（完结）Java项目实战笔记--基于SpringBoot3.0开发仿12306高并发售票系统--(三)项目优化

本文参考自

Springboot3+微服务实战12306高性能售票系统 - 慕课网 (imooc.com)

本文是仿12306项目实战第（三）章——项目优化，本篇将讲解该项目最后的优化部分以及一些压测知识点

本章目录

一、压力测试-高并发优化前后的性能对比
二、项目功能优化
三、只允许购买两周内的车次

一、压力测试-高并发优化前后的性能对比

1.压力测试相关概念讲解

在这里插入图片描述

我们项目测试的就是下单购票这一个接口，所以tps=qps，然后tps和吞吐量又是一个意思，所以目前三者相等

2.JMeter压测

先将令牌数设置充足

异步处理后的代码，测试下单购票接口的吞吐量，其实只是和前半部分有关，而前半部分如果令牌数不够，就直接快速失败了，所以防止这种情况导致测试结果不准确，我们直接把令牌数调大。

在这里插入图片描述

开始压测

这里我们设置500线程永远循环，通过聚合报告看结果

在这里插入图片描述

可以看到结果是900多

在这里插入图片描述

恢复代码到初版

在这里插入图片描述

测试前将座位调多一些然后生成多一些车票，因为是同步的，整个过程会去查询余票数了，没票会快速失败

在这里插入图片描述

由于如果还是500个线程的话，出现异常太多了，测试结果可能不太准确，我这里就只设置了50个线程来测试

结果：

可以看到吞吐量明显降低，经过我们上一章节的各种优化后（主要是异步），吞吐量提升了大概25倍多

在这里插入图片描述

3.将mq去除，改用成springboot自带的异步

实际项目中看情况增加中间件，并不是中间件越多越好，像这里我们用springboot的异步，也能达到同样的效果，吞吐量也擦不多

注释掉所有和mq相关的代码、依赖、配置

换成springboot自带的异步

BusinessApplication.java

@EnableAsync
public class BusinessApplication {

BeforeConfirmOrderService

package com.neilxu.train.business.service;

import cn.hutool.core.date.DateTime;
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.alibaba.fastjson.JSON;
import com.neilxu.train.business.domain.ConfirmOrder;
import com.neilxu.train.business.dto.ConfirmOrderMQDto;
import com.neilxu.train.business.enums.ConfirmOrderStatusEnum;
import com.neilxu.train.business.mapper.ConfirmOrderMapper;
import com.neilxu.train.business.req.ConfirmOrderDoReq;
import com.neilxu.train.business.req.ConfirmOrderTicketReq;
import com.neilxu.train.common.context.LoginMemberContext;
import com.neilxu.train.common.exception.BusinessException;
import com.neilxu.train.common.exception.BusinessExceptionEnum;
import com.neilxu.train.common.util.SnowUtil;
import jakarta.annotation.Resource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Date;
import java.util.List;

@Service
public class BeforeConfirmOrderService {

    private static final Logger LOG = LoggerFactory.getLogger(BeforeConfirmOrderService.class);

    @Resource
    private ConfirmOrderMapper confirmOrderMapper;

    @Autowired
    private SkTokenService skTokenService;

//    @Resource
//    public RocketMQTemplate rocketMQTemplate;
    @Resource
    private ConfirmOrderService confirmOrderService;

    @SentinelResource(value = "beforeDoConfirm", blockHandler = "beforeDoConfirmBlock")
    public Long beforeDoConfirm(ConfirmOrderDoReq req) {
        req.setMemberId(LoginMemberContext.getId());
        // 校验令牌余量
        boolean validSkToken = skTokenService.validSkToken(req.getDate(), req.getTrainCode(), LoginMemberContext.getId());
        if (validSkToken) {
            LOG.info("令牌校验通过");
        } else {
            LOG.info("令牌校验不通过");
            throw new BusinessException(BusinessExceptionEnum.CONFIRM_ORDER_SK_TOKEN_FAIL);
        }

        Date date = req.getDate();
        String trainCode = req.getTrainCode();
        String start = req.getStart();
        String end = req.getEnd();
        List<ConfirmOrderTicketReq> tickets = req.getTickets();

        // 保存确认订单表，状态初始
        DateTime now = DateTime.now();
        ConfirmOrder confirmOrder = new ConfirmOrder();
        confirmOrder.setId(SnowUtil.getSnowflakeNextId());
        confirmOrder.setCreateTime(now);
        confirmOrder.setUpdateTime(now);
        confirmOrder.setMemberId(req.getMemberId());
        confirmOrder.setDate(date);
        confirmOrder.setTrainCode(trainCode);
        confirmOrder.setStart(start);
        confirmOrder.setEnd(end);
        confirmOrder.setDailyTrainTicketId(req.getDailyTrainTicketId());
        confirmOrder.setStatus(ConfirmOrderStatusEnum.INIT.getCode());
        confirmOrder.setTickets(JSON.toJSONString(tickets));
        confirmOrderMapper.insert(confirmOrder);

        // 发送MQ排队购票
        ConfirmOrderMQDto confirmOrderMQDto = new ConfirmOrderMQDto();
        confirmOrderMQDto.setDate(req.getDate());
        confirmOrderMQDto.setTrainCode(req.getTrainCode());
        confirmOrderMQDto.setLogId(MDC.get("LOG_ID"));
        String reqJson = JSON.toJSONString(confirmOrderMQDto);
//        LOG.info("排队购票，发送mq开始，消息：{}", reqJson);
//        rocketMQTemplate.convertAndSend(RocketMQTopicEnum.CONFIRM_ORDER.getCode(), reqJson);
//        LOG.info("排队购票，发送mq结束");

        confirmOrderService.doConfirm(confirmOrderMQDto);

        return confirmOrder.getId();

    }

    /**
     * 降级方法，需包含限流方法的所有参数和BlockException参数
     * @param req
     * @param e
     */
    public void beforeDoConfirmBlock(ConfirmOrderDoReq req, BlockException e) {
        LOG.info("购票请求被限流：{}", req);
        throw new BusinessException(BusinessExceptionEnum.CONFIRM_ORDER_FLOW_EXCEPTION);
    }
}

ConfirmOrderService.java

@Async
@SentinelResource(value = "doConfirm", blockHandler = "doConfirmBlock")
public void doConfirm(ConfirmOrderMQDto dto) {
    MDC.put("LOG_ID", dto.getLogId());
    LOG.info("异步出票开始：{}", dto);

测试吞吐量

结果和mq的相差不大

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二、项目功能优化

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1.购票页面增加取消排队的功能

逻辑就是主动将订单状态改为取消

ConfirmOrderService.java

/**
 * 取消排队，只有I状态才能取消排队，所以按状态更新
 * @param id
 */
public Integer cancel(Long id) {
    ConfirmOrderExample confirmOrderExample = new ConfirmOrderExample();
    ConfirmOrderExample.Criteria criteria = confirmOrderExample.createCriteria();
    criteria.andIdEqualTo(id).andStatusEqualTo(ConfirmOrderStatusEnum.INIT.getCode());
    ConfirmOrder confirmOrder = new ConfirmOrder();
    confirmOrder.setStatus(ConfirmOrderStatusEnum.CANCEL.getCode());
    return confirmOrderMapper.updateByExampleSelective(confirmOrder, confirmOrderExample);
}

ConfirmOrderController.java

@GetMapping("/cancel/{id}")
public CommonResp<Integer> cancel(@PathVariable Long id) {
    Integer count = confirmOrderService.cancel(id);
    return new CommonResp<>(count);
}

order.vue

<template>
  <div class="order-train">
    <span class="order-train-main">{{dailyTrainTicket.date}}</span>&nbsp;
    <span class="order-train-main">{{dailyTrainTicket.trainCode}}</span>次&nbsp;
    <span class="order-train-main">{{dailyTrainTicket.start}}</span>站
    <span class="order-train-main">({{dailyTrainTicket.startTime}})</span>&nbsp;
    <span class="order-train-main">——</span>&nbsp;
    <span class="order-train-main">{{dailyTrainTicket.end}}</span>站
    <span class="order-train-main">({{dailyTrainTicket.endTime}})</span>&nbsp;

    <div class="order-train-ticket">
      <span v-for="item in seatTypes" :key="item.type">
        <span>{{item.desc}}</span>：
        <span class="order-train-ticket-main">{{item.price}}￥</span>&nbsp;
        <span class="order-train-ticket-main">{{item.count}}</span>&nbsp;张票&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      </span>
    </div>
  </div>
  <a-divider></a-divider>
  <b>勾选要购票的乘客：</b>&nbsp;
  <a-checkbox-group v-model:value="passengerChecks" :options="passengerOptions" />

  <div class="order-tickets">
    <a-row class="order-tickets-header" v-if="tickets.length > 0">
      <a-col :span="2">乘客</a-col>
      <a-col :span="6">身份证</a-col>
      <a-col :span="4">票种</a-col>
      <a-col :span="4">座位类型</a-col>
    </a-row>
    <a-row class="order-tickets-row" v-for="ticket in tickets" :key="ticket.passengerId">
      <a-col :span="2">{{ticket.passengerName}}</a-col>
      <a-col :span="6">{{ticket.passengerIdCard}}</a-col>
      <a-col :span="4">
        <a-select v-model:value="ticket.passengerType" style="width: 100%">
          <a-select-option v-for="item in PASSENGER_TYPE_ARRAY" :key="item.code" :value="item.code">
            {{item.desc}}
          </a-select-option>
        </a-select>
      </a-col>
      <a-col :span="4">
        <a-select v-model:value="ticket.seatTypeCode" style="width: 100%">
          <a-select-option v-for="item in seatTypes" :key="item.code" :value="item.code">
            {{item.desc}}
          </a-select-option>
        </a-select>
      </a-col>
    </a-row>
  </div>
  <div v-if="tickets.length > 0">
    <a-button type="primary" size="large" @click="finishCheckPassenger">提交订单</a-button>
  </div>

  <a-modal v-model:visible="visible" title="请核对以下信息"
           style="top: 50px; width: 800px"
           ok-text="确认" cancel-text="取消"
           @ok="showFirstImageCodeModal">
    <div class="order-tickets">
      <a-row class="order-tickets-header" v-if="tickets.length > 0">
        <a-col :span="3">乘客</a-col>
        <a-col :span="15">身份证</a-col>
        <a-col :span="3">票种</a-col>
        <a-col :span="3">座位类型</a-col>
      </a-row>
      <a-row class="order-tickets-row" v-for="ticket in tickets" :key="ticket.passengerId">
        <a-col :span="3">{{ticket.passengerName}}</a-col>
        <a-col :span="15">{{ticket.passengerIdCard}}</a-col>
        <a-col :span="3">
          <span v-for="item in PASSENGER_TYPE_ARRAY" :key="item.code">
            <span v-if="item.code === ticket.passengerType">
              {{item.desc}}
            </span>
          </span>
        </a-col>
        <a-col :span="3">
          <span v-for="item in seatTypes" :key="item.code">
            <span v-if="item.code === ticket.seatTypeCode">
              {{item.desc}}
            </span>
          </span>
        </a-col>
      </a-row>
      <br/>
      <div v-if="chooseSeatType === 0" style="color: red;">
        您购买的车票不支持选座
        <div>12306规则：只有全部是一等座或全部是二等座才支持选座</div>
        <div>12306规则：余票小于一定数量时，不允许选座（本项目以20为例）</div>
      </div>
      <div v-else style="text-align: center">
        <a-switch class="choose-seat-item" v-for="item in SEAT_COL_ARRAY" :key="item.code"
                  v-model:checked="chooseSeatObj[item.code + '1']" :checked-children="item.desc" :un-checked-children="item.desc" />
        <div v-if="tickets.length > 1">
          <a-switch class="choose-seat-item" v-for="item in SEAT_COL_ARRAY" :key="item.code"
                    v-model:checked="chooseSeatObj[item.code + '2']" :checked-children="item.desc" :un-checked-children="item.desc" />
        </div>
        <div style="color: #999999">提示：您可以选择{{tickets.length}}个座位</div>
      </div>
      <!--<br/>-->
      <!--最终购票：{{tickets}}-->
      <!--最终选座：{{chooseSeatObj}}-->
    </div>
  </a-modal>

  <!-- 第二层验证码 后端 -->
  <a-modal v-model:visible="imageCodeModalVisible" :title="null" :footer="null" :closable="false"
           style="top: 50px; width: 400px">
    <p style="text-align: center; font-weight: bold; font-size: 18px">
      使用服务端验证码削弱瞬时高峰<br/>
      防止机器人刷票
    </p>
    <p>
      <a-input v-model:value="imageCode" placeholder="图片验证码">
        <template #suffix>
          <img v-show="!!imageCodeSrc" :src="imageCodeSrc" alt="验证码" v-on:click="loadImageCode()"/>
        </template>
      </a-input>
    </p>
    <a-button type="danger" block @click="handleOk">输入验证码后开始购票</a-button>
  </a-modal>

  <!-- 第一层验证码 纯前端 -->
  <a-modal v-model:visible="firstImageCodeModalVisible" :title="null" :footer="null" :closable="false"
           style="top: 50px; width: 400px">
    <p style="text-align: center; font-weight: bold; font-size: 18px">
      使用纯前端验证码削弱瞬时高峰<br/>
      减小后端验证码接口的压力
    </p>
    <p>
      <a-input v-model:value="firstImageCodeTarget" placeholder="验证码">
        <template #suffix>
          {{firstImageCodeSourceA}} + {{firstImageCodeSourceB}}
        </template>
      </a-input>
    </p>
    <a-button type="danger" block @click="validFirstImageCode">提交验证码</a-button>
  </a-modal>

  <a-modal v-model:visible="lineModalVisible" title="排队购票" :footer="null" :maskClosable="false" :closable="false"
           style="top: 50px; width: 400px">
    <div class="book-line">
      <div v-show="confirmOrderLineCount < 0">
        <loading-outlined /> 系统正在处理中...
      </div>
      <div v-show="confirmOrderLineCount >= 0">
        <loading-outlined /> 您前面还有{{confirmOrderLineCount}}位用户在购票，排队中，请稍候
      </div>
    </div>
    <br/>
    <a-button type="danger" @click="onCancelOrder">取消购票</a-button>
  </a-modal>
</template>

<script>

import {defineComponent, ref, onMounted, watch, computed} from 'vue';
import axios from "axios";
import {notification} from "ant-design-vue";

export default defineComponent({
  name: "order-view",
  setup() {
    const passengers = ref([]);
    const passengerOptions = ref([]);
    const passengerChecks = ref([]);
    const dailyTrainTicket = SessionStorage.get(SESSION_ORDER) || {};
    console.log("下单的车次信息", dailyTrainTicket);

    const SEAT_TYPE = window.SEAT_TYPE;
    console.log(SEAT_TYPE)
    // 本车次提供的座位类型seatTypes，含票价，余票等信息，例：
    // {
    //   type: "YDZ",
    //   code: "1",
    //   desc: "一等座",
    //   count: "100",
    //   price: "50",
    // }
    // 关于SEAT_TYPE[KEY]：当知道某个具体的属性xxx时，可以用obj.xxx，当属性名是个变量时，可以使用obj[xxx]
    const seatTypes = [];
    for (let KEY in SEAT_TYPE) {
      let key = KEY.toLowerCase();
      if (dailyTrainTicket[key] >= 0) {
        seatTypes.push({
          type: KEY,
          code: SEAT_TYPE[KEY]["code"],
          desc: SEAT_TYPE[KEY]["desc"],
          count: dailyTrainTicket[key],
          price: dailyTrainTicket[key + 'Price'],
        })
      }
    }
    console.log("本车次提供的座位：", seatTypes)
    // 购票列表，用于界面展示，并传递到后端接口，用来描述：哪个乘客购买什么座位的票
    // {
    //   passengerId: 123,
    //   passengerType: "1",
    //   passengerName: "张三",
    //   passengerIdCard: "12323132132",
    //   seatTypeCode: "1",
    //   seat: "C1"
    // }
    const tickets = ref([]);
    const PASSENGER_TYPE_ARRAY = window.PASSENGER_TYPE_ARRAY;
    const visible = ref(false);
    const lineModalVisible = ref(false);
    const confirmOrderId = ref();
    const confirmOrderLineCount = ref(-1);

    // 勾选或去掉某个乘客时，在购票列表中加上或去掉一张表
    watch(() => passengerChecks.value, (newVal, oldVal)=>{
      console.log("勾选乘客发生变化", newVal, oldVal)
      // 每次有变化时，把购票列表清空，重新构造列表
      tickets.value = [];
      passengerChecks.value.forEach((item) => tickets.value.push({
        passengerId: item.id,
        passengerType: item.type,
        seatTypeCode: seatTypes[0].code,
        passengerName: item.name,
        passengerIdCard: item.idCard
      }))
    }, {immediate: true});

    // 0：不支持选座；1：选一等座；2：选二等座
    const chooseSeatType = ref(0);
    // 根据选择的座位类型，计算出对应的列，比如要选的是一等座，就筛选出ACDF，要选的是二等座，就筛选出ABCDF
    const SEAT_COL_ARRAY = computed(() => {
      return window.SEAT_COL_ARRAY.filter(item => item.type === chooseSeatType.value);
    });
    // 选择的座位
    // {
    //   A1: false, C1: true，D1: false, F1: false，
    //   A2: false, C2: false，D2: true, F2: false
    // }
    const chooseSeatObj = ref({});
    watch(() => SEAT_COL_ARRAY.value, () => {
      chooseSeatObj.value = {};
      for (let i = 1; i <= 2; i++) {
        SEAT_COL_ARRAY.value.forEach((item) => {
          chooseSeatObj.value[item.code + i] = false;
        })
      }
      console.log("初始化两排座位，都是未选中：", chooseSeatObj.value);
    }, {immediate: true});

    const handleQueryPassenger = () => {
      axios.get("/member/passenger/query-mine").then((response) => {
        let data = response.data;
        if (data.success) {
          passengers.value = data.content;
          passengers.value.forEach((item) => passengerOptions.value.push({
            label: item.name,
            value: item
          }))
        } else {
          notification.error({description: data.message});
        }
      });
    };

    const finishCheckPassenger = () => {
      console.log("购票列表：", tickets.value);

      if (tickets.value.length > 5) {
        notification.error({description: '最多只能购买5张车票'});
        return;
      }

      // 校验余票是否充足，购票列表中的每个座位类型，都去车次座位余票信息中，看余票是否充足
      // 前端校验不一定准，但前端校验可以减轻后端很多压力
      // 注意：这段只是校验，必须copy出seatTypesTemp变量来扣减，用原始的seatTypes去扣减，会影响真实的库存
      let seatTypesTemp = Tool.copy(seatTypes);
      for (let i = 0; i < tickets.value.length; i++) {
        let ticket = tickets.value[i];
        for (let j = 0; j < seatTypesTemp.length; j++) {
          let seatType = seatTypesTemp[j];
          // 同类型座位余票-1，这里扣减的是临时copy出来的库存，不是真正的库存，只是为了校验
          if (ticket.seatTypeCode === seatType.code) {
            seatType.count--;
            if (seatType.count < 0) {
              notification.error({description: seatType.desc + '余票不足'});
              return;
            }
          }
        }
      }
      console.log("前端余票校验通过");

      // 判断是否支持选座，只有纯一等座和纯二等座支持选座
      // 先筛选出购票列表中的所有座位类型，比如四张表：[1, 1, 2, 2]
      let ticketSeatTypeCodes = [];
      for (let i = 0; i < tickets.value.length; i++) {
        let ticket = tickets.value[i];
        ticketSeatTypeCodes.push(ticket.seatTypeCode);
      }
      // 为购票列表中的所有座位类型去重：[1, 2]
      const ticketSeatTypeCodesSet = Array.from(new Set(ticketSeatTypeCodes));
      console.log("选好的座位类型：", ticketSeatTypeCodesSet);
      if (ticketSeatTypeCodesSet.length !== 1) {
        console.log("选了多种座位，不支持选座");
        chooseSeatType.value = 0;
      } else {
        // ticketSeatTypeCodesSet.length === 1，即只选择了一种座位（不是一个座位，是一种座位）
        if (ticketSeatTypeCodesSet[0] === SEAT_TYPE.YDZ.code) {
          console.log("一等座选座");
          chooseSeatType.value = SEAT_TYPE.YDZ.code;
        } else if (ticketSeatTypeCodesSet[0] === SEAT_TYPE.EDZ.code) {
          console.log("二等座选座");
          chooseSeatType.value = SEAT_TYPE.EDZ.code;
        } else {
          console.log("不是一等座或二等座，不支持选座");
          chooseSeatType.value = 0;
        }

        // 余票小于20张时，不允许选座，否则选座成功率不高，影响出票
        if (chooseSeatType.value !== 0) {
          for (let i = 0; i < seatTypes.length; i++) {
            let seatType = seatTypes[i];
            // 找到同类型座位
            if (ticketSeatTypeCodesSet[0] === seatType.code) {
              // 判断余票，小于20张就不支持选座
              if (seatType.count < 20) {
                console.log("余票小于20张就不支持选座")
                chooseSeatType.value = 0;
                break;
              }
            }
          }
        }
      }

      // 弹出确认界面
      visible.value = true;

    };

    const handleOk = () => {
      if (Tool.isEmpty(imageCode.value)) {
        notification.error({description: '验证码不能为空'});
        return;
      }

      console.log("选好的座位：", chooseSeatObj.value);

      // 设置每张票的座位
      // 先清空购票列表的座位，有可能之前选了并设置座位了，但选座数不对被拦截了，又重新选一遍
      for (let i = 0; i < tickets.value.length; i++) {
        tickets.value[i].seat = null;
      }
      let i = -1;
      // 要么不选座位，要么所选座位应该等于购票数，即i === (tickets.value.length - 1)
      for (let key in chooseSeatObj.value) {
        if (chooseSeatObj.value[key]) {
          i++;
          if (i > tickets.value.length - 1) {
            notification.error({description: '所选座位数大于购票数'});
            return;
          }
          tickets.value[i].seat = key;
        }
      }
      if (i > -1 && i < (tickets.value.length - 1)) {
        notification.error({description: '所选座位数小于购票数'});
        return;
      }

      console.log("最终购票：", tickets.value);

      axios.post("/business/confirm-order/do", {
        dailyTrainTicketId: dailyTrainTicket.id,
        date: dailyTrainTicket.date,
        trainCode: dailyTrainTicket.trainCode,
        start: dailyTrainTicket.start,
        end: dailyTrainTicket.end,
        tickets: tickets.value,
        imageCodeToken: imageCodeToken.value,
        imageCode: imageCode.value,
      }).then((response) => {
        let data = response.data;
        if (data.success) {
          // notification.success({description: "下单成功！"});
          visible.value = false;
          imageCodeModalVisible.value = false;
          lineModalVisible.value = true;
          confirmOrderId.value = data.content;
          queryLineCount();
        } else {
          notification.error({description: data.message});
        }
      });
    }

    /* ------------------- 定时查询订单状态 --------------------- */
    // 确认订单后定时查询
    let queryLineCountInterval;

    // 定时查询订单结果/排队数量
    const queryLineCount = () => {
      confirmOrderLineCount.value = -1;
      queryLineCountInterval = setInterval(function () {
        axios.get("/business/confirm-order/query-line-count/" + confirmOrderId.value).then((response) => {
          let data = response.data;
          if (data.success) {
            let result = data.content;
            switch (result) {
              case -1 :
                notification.success({description: "购票成功！"});
                lineModalVisible.value = false;
                clearInterval(queryLineCountInterval);
                break;
              case -2:
                notification.error({description: "购票失败！"});
                lineModalVisible.value = false;
                clearInterval(queryLineCountInterval);
                break;
              case -3:
                notification.error({description: "抱歉，没票了！"});
                lineModalVisible.value = false;
                clearInterval(queryLineCountInterval);
                break;
              default:
                confirmOrderLineCount.value = result;
            }
          } else {
            notification.error({description: data.message});
          }
        });
      }, 500);
    };

    /* ------------------- 第二层验证码 --------------------- */
    const imageCodeModalVisible = ref();
    const imageCodeToken = ref();
    const imageCodeSrc = ref();
    const imageCode = ref();
    /**
     * 加载图形验证码
     */
    const loadImageCode = () => {
      imageCodeToken.value = Tool.uuid(8);
      imageCodeSrc.value = process.env.VUE_APP_SERVER + '/business/kaptcha/image-code/' + imageCodeToken.value;
    };

    const showImageCodeModal = () => {
      loadImageCode();
      imageCodeModalVisible.value = true;
    };

    /* ------------------- 第一层验证码 --------------------- */
    const firstImageCodeSourceA = ref();
    const firstImageCodeSourceB = ref();
    const firstImageCodeTarget = ref();
    const firstImageCodeModalVisible = ref();

    /**
     * 加载第一层验证码
     */
    const loadFirstImageCode = () => {
      // 获取1~10的数：Math.floor(Math.random()*10 + 1)
      firstImageCodeSourceA.value = Math.floor(Math.random()*10 + 1) + 10;
      firstImageCodeSourceB.value = Math.floor(Math.random()*10 + 1) + 20;
    };

    /**
     * 显示第一层验证码弹出框
     */
    const showFirstImageCodeModal = () => {
      loadFirstImageCode();
      firstImageCodeModalVisible.value = true;
    };

    /**
     * 校验第一层验证码
     */
    const validFirstImageCode = () => {
      if (parseInt(firstImageCodeTarget.value) === parseInt(firstImageCodeSourceA.value + firstImageCodeSourceB.value)) {
        // 第一层验证通过
        firstImageCodeModalVisible.value = false;
        showImageCodeModal();
      } else {
        notification.error({description: '验证码错误'});
      }
    };

    /**
     * 取消排队
     */
    const onCancelOrder = () => {
      axios.get("/business/confirm-order/cancel/" + confirmOrderId.value).then((response) => {
        let data = response.data;
        if (data.success) {
          let result = data.content;
          if (result === 1) {
            notification.success({description: "取消成功！"});
            // 取消成功时，不用再轮询排队结果
            clearInterval(queryLineCountInterval);
            lineModalVisible.value = false;
          } else {
            notification.error({description: "取消失败！"});
          }
        } else {
          notification.error({description: data.message});
        }
      });
    };

    onMounted(() => {
      handleQueryPassenger();
    });

    return {
      passengers,
      dailyTrainTicket,
      seatTypes,
      passengerOptions,
      passengerChecks,
      tickets,
      PASSENGER_TYPE_ARRAY,
      visible,
      finishCheckPassenger,
      chooseSeatType,
      chooseSeatObj,
      SEAT_COL_ARRAY,
      handleOk,
      imageCodeToken,
      imageCodeSrc,
      imageCode,
      showImageCodeModal,
      imageCodeModalVisible,
      loadImageCode,
      firstImageCodeSourceA,
      firstImageCodeSourceB,
      firstImageCodeTarget,
      firstImageCodeModalVisible,
      showFirstImageCodeModal,
      validFirstImageCode,
      lineModalVisible,
      confirmOrderId,
      confirmOrderLineCount,
      onCancelOrder
    };
  },
});
</script>

<style>
.order-train .order-train-main {
  font-size: 18px;
  font-weight: bold;
}
.order-train .order-train-ticket {
  margin-top: 15px;
}
.order-train .order-train-ticket .order-train-ticket-main {
  color: red;
  font-size: 18px;
}

.order-tickets {
  margin: 10px 0;
}
.order-tickets .ant-col {
  padding: 5px 10px;
}
.order-tickets .order-tickets-header {
  background-color: cornflowerblue;
  border: solid 1px cornflowerblue;
  color: white;
  font-size: 16px;
  padding: 5px 0;
}
.order-tickets .order-tickets-row {
  border: solid 1px cornflowerblue;
  border-top: none;
  vertical-align: middle;
  line-height: 30px;
}

.order-tickets .choose-seat-item {
  margin: 5px 5px;
}
</style>

效果

在这里插入图片描述

2.余票查询页面增加显示车站信息

完善余票查询的功能体验，可以看到某个车次的所有途径车站和到站出站时间信息

DailyTrainStationQueryAllReq.java

package com.neilxu.train.business.req;

import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import lombok.Data;
import org.springframework.format.annotation.DateTimeFormat;

import java.util.Date;

@Data
public class DailyTrainStationQueryAllReq {

    /**
     * 日期
     */
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    @NotNull(message = "【日期】不能为空")
    private Date date;

    /**
     * 车次编号
     */
    @NotBlank(message = "【车次编号】不能为空")
    private String trainCode;
    
}

DailyTrainStationService.java

/**
 * 按车次日期查询车站列表，用于界面显示一列车经过的车站
 */
public List<DailyTrainStationQueryResp> queryByTrain(Date date, String trainCode) {
    DailyTrainStationExample dailyTrainStationExample = new DailyTrainStationExample();
    dailyTrainStationExample.setOrderByClause("`index` asc");
    dailyTrainStationExample.createCriteria().andDateEqualTo(date).andTrainCodeEqualTo(trainCode);
    List<DailyTrainStation> list = dailyTrainStationMapper.selectByExample(dailyTrainStationExample);
    return BeanUtil.copyToList(list, DailyTrainStationQueryResp.class);
}

DailyTrainStationController.java

package com.neilxu.train.business.controller;

import com.neilxu.train.business.req.DailyTrainStationQueryAllReq;
import com.neilxu.train.business.resp.DailyTrainStationQueryResp;
import com.neilxu.train.business.service.DailyTrainStationService;
import com.neilxu.train.common.resp.CommonResp;
import jakarta.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@RequestMapping("/daily-train-station")
public class DailyTrainStationController {

    @Autowired
    private DailyTrainStationService dailyTrainStationService;

    @GetMapping("/query-by-train-code")
    public CommonResp<List<DailyTrainStationQueryResp>> queryByTrain(@Valid DailyTrainStationQueryAllReq req) {
        List<DailyTrainStationQueryResp> list = dailyTrainStationService.queryByTrain(req.getDate(), req.getTrainCode());
        return new CommonResp<>(list);
    }

}

ticket.vue

<template>
  <p>
    <a-space>
      <a-date-picker v-model:value="params.date" valueFormat="YYYY-MM-DD" placeholder="请选择日期"></a-date-picker>
      <station-select-view v-model="params.start" width="200px"></station-select-view>
      <station-select-view v-model="params.end" width="200px"></station-select-view>
      <a-button type="primary" @click="handleQuery()">查找</a-button>
    </a-space>
  </p>
  <a-table :dataSource="dailyTrainTickets"
           :columns="columns"
           :pagination="pagination"
           @change="handleTableChange"
           :loading="loading">
    <template #bodyCell="{ column, record }">
      <template v-if="column.dataIndex === 'operation'">
        <a-space>
          <a-button type="primary" @click="toOrder(record)">预订</a-button>
          <a-button type="primary" @click="showStation(record)">途经车站</a-button>
        </a-space>
      </template>
      <template v-else-if="column.dataIndex === 'station'">
        {{record.start}}<br/>
        {{record.end}}
      </template>
      <template v-else-if="column.dataIndex === 'time'">
        {{record.startTime}}<br/>
        {{record.endTime}}
      </template>
      <template v-else-if="column.dataIndex === 'duration'">
        {{calDuration(record.startTime, record.endTime)}}<br/>
        <div v-if="record.startTime.replaceAll(':', '') >= record.endTime.replaceAll(':', '')">
          次日到达
        </div>
        <div v-else>
          当日到达
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'ydz'">
        <div v-if="record.ydz >= 0">
          {{record.ydz}}<br/>
          {{record.ydzPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'edz'">
        <div v-if="record.edz >= 0">
          {{record.edz}}<br/>
          {{record.edzPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'rw'">
        <div v-if="record.rw >= 0">
          {{record.rw}}<br/>
          {{record.rwPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'yw'">
        <div v-if="record.yw >= 0">
          {{record.yw}}<br/>
          {{record.ywPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
    </template>
  </a-table>

  <!-- 途经车站 -->
  <a-modal style="top: 30px" v-model:visible="visible" :title="null" :footer="null" :closable="false">
    <a-table :data-source="stations" :pagination="false">
      <a-table-column key="index" title="站序" data-index="index" />
      <a-table-column key="name" title="站名" data-index="name" />
      <a-table-column key="inTime" title="进站时间" data-index="inTime">
        <template #default="{ record }">
          {{record.index === 0 ? '-' : record.inTime}}
        </template>
      </a-table-column>
      <a-table-column key="outTime" title="出站时间" data-index="outTime">
        <template #default="{ record }">
          {{record.index === (stations.length - 1) ? '-' : record.outTime}}
        </template>
      </a-table-column>
      <a-table-column key="stopTime" title="停站时长" data-index="stopTime">
        <template #default="{ record }">
          {{record.index === 0 || record.index === (stations.length - 1) ? '-' : record.stopTime}}
        </template>
      </a-table-column>
    </a-table>
  </a-modal>
</template>

<script>
import { defineComponent, ref, onMounted } from 'vue';
import {notification} from "ant-design-vue";
import axios from "axios";
import StationSelectView from "@/components/station-select";
import dayjs from "dayjs";
import router from "@/router";

export default defineComponent({
  name: "ticket-view",
  components: {StationSelectView},
  setup() {
    const visible = ref(false);
    let dailyTrainTicket = ref({
      id: undefined,
      date: undefined,
      trainCode: undefined,
      start: undefined,
      startPinyin: undefined,
      startTime: undefined,
      startIndex: undefined,
      end: undefined,
      endPinyin: undefined,
      endTime: undefined,
      endIndex: undefined,
      ydz: undefined,
      ydzPrice: undefined,
      edz: undefined,
      edzPrice: undefined,
      rw: undefined,
      rwPrice: undefined,
      yw: undefined,
      ywPrice: undefined,
      createTime: undefined,
      updateTime: undefined,
    });
    const dailyTrainTickets = ref([]);
    // 分页的三个属性名是固定的
    const pagination = ref({
      total: 0,
      current: 1,
      pageSize: 10,
    });
    let loading = ref(false);
    const params = ref({});
    const columns = [
      {
        title: '车次编号',
        dataIndex: 'trainCode',
        key: 'trainCode',
      },
      {
        title: '车站',
        dataIndex: 'station',
      },
      {
        title: '时间',
        dataIndex: 'time',
      },
      {
        title: '历时',
        dataIndex: 'duration',
      },
      {
        title: '一等座',
        dataIndex: 'ydz',
        key: 'ydz',
      },
      {
        title: '二等座',
        dataIndex: 'edz',
        key: 'edz',
      },
      {
        title: '软卧',
        dataIndex: 'rw',
        key: 'rw',
      },
      {
        title: '硬卧',
        dataIndex: 'yw',
        key: 'yw',
      },
      {
        title: '操作',
        dataIndex: 'operation',
      },
    ];


    const handleQuery = (param) => {
      if (Tool.isEmpty(params.value.date)) {
        notification.error({description: "请输入日期"});
        return;
      }
      if (Tool.isEmpty(params.value.start)) {
        notification.error({description: "请输入出发地"});
        return;
      }
      if (Tool.isEmpty(params.value.end)) {
        notification.error({description: "请输入目的地"});
        return;
      }
      if (!param) {
        param = {
          page: 1,
          size: pagination.value.pageSize
        };
      }

      // 保存查询参数
      SessionStorage.set(SESSION_TICKET_PARAMS, params.value);

      loading.value = true;
      axios.get("/business/daily-train-ticket/query-list", {
        params: {
          page: param.page,
          size: param.size,
          trainCode: params.value.trainCode,
          date: params.value.date,
          start: params.value.start,
          end: params.value.end
        }
      }).then((response) => {
        loading.value = false;
        let data = response.data;
        if (data.success) {
          dailyTrainTickets.value = data.content.list;
          // 设置分页控件的值
          pagination.value.current = param.page;
          pagination.value.total = data.content.total;
        } else {
          notification.error({description: data.message});
        }
      });
    };

    const handleTableChange = (page) => {
      // console.log("看看自带的分页参数都有啥：" + JSON.stringify(page));
      pagination.value.pageSize = page.pageSize;
      handleQuery({
        page: page.current,
        size: page.pageSize
      });
    };

    const calDuration = (startTime, endTime) => {
      let diff = dayjs(endTime, 'HH:mm:ss').diff(dayjs(startTime, 'HH:mm:ss'), 'seconds');
      return dayjs('00:00:00', 'HH:mm:ss').second(diff).format('HH:mm:ss');
    };

    const toOrder = (record) => {
      dailyTrainTicket.value = Tool.copy(record);
      SessionStorage.set(SESSION_ORDER, dailyTrainTicket.value);
      router.push("/order")
    };

    // ---------------------- 途经车站 ----------------------
    const stations = ref([]);
    const showStation = record => {
      visible.value = true;
      axios.get("/business/daily-train-station/query-by-train-code", {
        params: {
          date: record.date,
          trainCode: record.trainCode
        }
      }).then((response) => {
        let data = response.data;
        if (data.success) {
          stations.value = data.content;
        } else {
          notification.error({description: data.message});
        }
      });
    };

    onMounted(() => {
      //  "|| {}"是常用技巧，可以避免空指针异常
      params.value = SessionStorage.get(SESSION_TICKET_PARAMS) || {};
      if (Tool.isNotEmpty(params.value)) {
        handleQuery({
          page: 1,
          size: pagination.value.pageSize
        });
      }
    });

    return {
      dailyTrainTicket,
      visible,
      dailyTrainTickets,
      pagination,
      columns,
      handleTableChange,
      handleQuery,
      loading,
      params,
      calDuration,
      toOrder,
      showStation,
      stations
    };
  },
});
</script>

效果

在这里插入图片描述

3.购票页面增加发起多人排队功能

本质就是一次下多条订单，最后返给前端的是最后一条订单的id，给前端的效果就是我是排队在最后面的那个订单

ConfirmOrderDoReq.java

/**
 * 加入排队人数，用于体验排队功能
 */
private int lineNumber;

@Override
public String toString() {
    return "ConfirmOrderDoReq{" +
            "memberId=" + memberId +
            ", date=" + date +
            ", trainCode='" + trainCode + '\'' +
            ", start='" + start + '\'' +
            ", end='" + end + '\'' +
            ", dailyTrainTicketId=" + dailyTrainTicketId +
            ", tickets=" + tickets +
            ", imageCode='" + imageCode + '\'' +
            ", imageCodeToken='" + imageCodeToken + '\'' +
            ", logId='" + logId + '\'' +
            ", lineNumber=" + lineNumber +
            '}';
}

BeforeConfirmOrderService.java

@SentinelResource(value = "beforeDoConfirm", blockHandler = "beforeDoConfirmBlock")
public Long beforeDoConfirm(ConfirmOrderDoReq req) {
    Long id = null;
    // 根据前端传值，加入排队人数
    for (int i = 0; i < req.getLineNumber() + 1; i++) {
        req.setMemberId(LoginMemberContext.getId());
        // 校验令牌余量
        boolean validSkToken = skTokenService.validSkToken(req.getDate(), req.getTrainCode(), LoginMemberContext.getId());
        if (validSkToken) {
            LOG.info("令牌校验通过");
        } else {
            LOG.info("令牌校验不通过");
            throw new BusinessException(BusinessExceptionEnum.CONFIRM_ORDER_SK_TOKEN_FAIL);
        }

        Date date = req.getDate();
        String trainCode = req.getTrainCode();
        String start = req.getStart();
        String end = req.getEnd();
        List<ConfirmOrderTicketReq> tickets = req.getTickets();

        // 保存确认订单表，状态初始
        DateTime now = DateTime.now();
        ConfirmOrder confirmOrder = new ConfirmOrder();
        confirmOrder.setId(SnowUtil.getSnowflakeNextId());
        confirmOrder.setCreateTime(now);
        confirmOrder.setUpdateTime(now);
        confirmOrder.setMemberId(req.getMemberId());
        confirmOrder.setDate(date);
        confirmOrder.setTrainCode(trainCode);
        confirmOrder.setStart(start);
        confirmOrder.setEnd(end);
        confirmOrder.setDailyTrainTicketId(req.getDailyTrainTicketId());
        confirmOrder.setStatus(ConfirmOrderStatusEnum.INIT.getCode());
        confirmOrder.setTickets(JSON.toJSONString(tickets));
        confirmOrderMapper.insert(confirmOrder);

        // 发送MQ排队购票
        ConfirmOrderMQDto confirmOrderMQDto = new ConfirmOrderMQDto();
        confirmOrderMQDto.setDate(req.getDate());
        confirmOrderMQDto.setTrainCode(req.getTrainCode());
        confirmOrderMQDto.setLogId(MDC.get("LOG_ID"));
        String reqJson = JSON.toJSONString(confirmOrderMQDto);
        // LOG.info("排队购票，发送mq开始，消息：{}", reqJson);
        // rocketMQTemplate.convertAndSend(RocketMQTopicEnum.CONFIRM_ORDER.getCode(), reqJson);
        // LOG.info("排队购票，发送mq结束");
        confirmOrderService.doConfirm(confirmOrderMQDto);
        id = confirmOrder.getId();
    }
    return id;
}

order.vue

<template>
  <div class="order-train">
    <span class="order-train-main">{{dailyTrainTicket.date}}</span>&nbsp;
    <span class="order-train-main">{{dailyTrainTicket.trainCode}}</span>次&nbsp;
    <span class="order-train-main">{{dailyTrainTicket.start}}</span>站
    <span class="order-train-main">({{dailyTrainTicket.startTime}})</span>&nbsp;
    <span class="order-train-main">——</span>&nbsp;
    <span class="order-train-main">{{dailyTrainTicket.end}}</span>站
    <span class="order-train-main">({{dailyTrainTicket.endTime}})</span>&nbsp;

    <div class="order-train-ticket">
      <span v-for="item in seatTypes" :key="item.type">
        <span>{{item.desc}}</span>：
        <span class="order-train-ticket-main">{{item.price}}￥</span>&nbsp;
        <span class="order-train-ticket-main">{{item.count}}</span>&nbsp;张票&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      </span>
    </div>
  </div>
  <a-divider></a-divider>
  <b>勾选要购票的乘客：</b>&nbsp;
  <a-checkbox-group v-model:value="passengerChecks" :options="passengerOptions" />

  <div class="order-tickets">
    <a-row class="order-tickets-header" v-if="tickets.length > 0">
      <a-col :span="2">乘客</a-col>
      <a-col :span="6">身份证</a-col>
      <a-col :span="4">票种</a-col>
      <a-col :span="4">座位类型</a-col>
    </a-row>
    <a-row class="order-tickets-row" v-for="ticket in tickets" :key="ticket.passengerId">
      <a-col :span="2">{{ticket.passengerName}}</a-col>
      <a-col :span="6">{{ticket.passengerIdCard}}</a-col>
      <a-col :span="4">
        <a-select v-model:value="ticket.passengerType" style="width: 100%">
          <a-select-option v-for="item in PASSENGER_TYPE_ARRAY" :key="item.code" :value="item.code">
            {{item.desc}}
          </a-select-option>
        </a-select>
      </a-col>
      <a-col :span="4">
        <a-select v-model:value="ticket.seatTypeCode" style="width: 100%">
          <a-select-option v-for="item in seatTypes" :key="item.code" :value="item.code">
            {{item.desc}}
          </a-select-option>
        </a-select>
      </a-col>
    </a-row>
  </div>
  <div v-if="tickets.length > 0">
    <a-button type="primary" size="large" @click="finishCheckPassenger">提交订单</a-button>
  </div>

  <a-modal v-model:visible="visible" title="请核对以下信息"
           style="top: 50px; width: 800px"
           ok-text="确认" cancel-text="取消"
           @ok="showFirstImageCodeModal">
    <div class="order-tickets">
      <a-row class="order-tickets-header" v-if="tickets.length > 0">
        <a-col :span="3">乘客</a-col>
        <a-col :span="15">身份证</a-col>
        <a-col :span="3">票种</a-col>
        <a-col :span="3">座位类型</a-col>
      </a-row>
      <a-row class="order-tickets-row" v-for="ticket in tickets" :key="ticket.passengerId">
        <a-col :span="3">{{ticket.passengerName}}</a-col>
        <a-col :span="15">{{ticket.passengerIdCard}}</a-col>
        <a-col :span="3">
          <span v-for="item in PASSENGER_TYPE_ARRAY" :key="item.code">
            <span v-if="item.code === ticket.passengerType">
              {{item.desc}}
            </span>
          </span>
        </a-col>
        <a-col :span="3">
          <span v-for="item in seatTypes" :key="item.code">
            <span v-if="item.code === ticket.seatTypeCode">
              {{item.desc}}
            </span>
          </span>
        </a-col>
      </a-row>
      <br/>
      <div v-if="chooseSeatType === 0" style="color: red;">
        您购买的车票不支持选座
        <div>12306规则：只有全部是一等座或全部是二等座才支持选座</div>
        <div>12306规则：余票小于一定数量时，不允许选座（本项目以20为例）</div>
      </div>
      <div v-else style="text-align: center">
        <a-switch class="choose-seat-item" v-for="item in SEAT_COL_ARRAY" :key="item.code"
                  v-model:checked="chooseSeatObj[item.code + '1']" :checked-children="item.desc" :un-checked-children="item.desc" />
        <div v-if="tickets.length > 1">
          <a-switch class="choose-seat-item" v-for="item in SEAT_COL_ARRAY" :key="item.code"
                    v-model:checked="chooseSeatObj[item.code + '2']" :checked-children="item.desc" :un-checked-children="item.desc" />
        </div>
        <div style="color: #999999">提示：您可以选择{{tickets.length}}个座位</div>
      </div>
      <br>
      <div style="color: red">
        体验排队购票，加入多人一起排队购票：
        <a-input-number v-model:value="lineNumber" :min="0" :max="20" />
      </div>
      <!--<br/>-->
      <!--最终购票：{{tickets}}-->
      <!--最终选座：{{chooseSeatObj}}-->
    </div>
  </a-modal>

  <!-- 第二层验证码 后端 -->
  <a-modal v-model:visible="imageCodeModalVisible" :title="null" :footer="null" :closable="false"
           style="top: 50px; width: 400px">
    <p style="text-align: center; font-weight: bold; font-size: 18px">
      使用服务端验证码削弱瞬时高峰<br/>
      防止机器人刷票
    </p>
    <p>
      <a-input v-model:value="imageCode" placeholder="图片验证码">
        <template #suffix>
          <img v-show="!!imageCodeSrc" :src="imageCodeSrc" alt="验证码" v-on:click="loadImageCode()"/>
        </template>
      </a-input>
    </p>
    <a-button type="danger" block @click="handleOk">输入验证码后开始购票</a-button>
  </a-modal>

  <!-- 第一层验证码 纯前端 -->
  <a-modal v-model:visible="firstImageCodeModalVisible" :title="null" :footer="null" :closable="false"
           style="top: 50px; width: 400px">
    <p style="text-align: center; font-weight: bold; font-size: 18px">
      使用纯前端验证码削弱瞬时高峰<br/>
      减小后端验证码接口的压力
    </p>
    <p>
      <a-input v-model:value="firstImageCodeTarget" placeholder="验证码">
        <template #suffix>
          {{firstImageCodeSourceA}} + {{firstImageCodeSourceB}}
        </template>
      </a-input>
    </p>
    <a-button type="danger" block @click="validFirstImageCode">提交验证码</a-button>
  </a-modal>

  <a-modal v-model:visible="lineModalVisible" title="排队购票" :footer="null" :maskClosable="false" :closable="false"
           style="top: 50px; width: 400px">
    <div class="book-line">
      <div v-show="confirmOrderLineCount < 0">
        <loading-outlined /> 系统正在处理中...
      </div>
      <div v-show="confirmOrderLineCount >= 0">
        <loading-outlined /> 您前面还有{{confirmOrderLineCount}}位用户在购票，排队中，请稍候
      </div>
    </div>
    <br/>
    <a-button type="danger" @click="onCancelOrder">取消购票</a-button>
  </a-modal>
</template>

<script>

import {defineComponent, ref, onMounted, watch, computed} from 'vue';
import axios from "axios";
import {notification} from "ant-design-vue";

export default defineComponent({
  name: "order-view",
  setup() {
    const passengers = ref([]);
    const passengerOptions = ref([]);
    const passengerChecks = ref([]);
    const dailyTrainTicket = SessionStorage.get(SESSION_ORDER) || {};
    console.log("下单的车次信息", dailyTrainTicket);

    const SEAT_TYPE = window.SEAT_TYPE;
    console.log(SEAT_TYPE)
    // 本车次提供的座位类型seatTypes，含票价，余票等信息，例：
    // {
    //   type: "YDZ",
    //   code: "1",
    //   desc: "一等座",
    //   count: "100",
    //   price: "50",
    // }
    // 关于SEAT_TYPE[KEY]：当知道某个具体的属性xxx时，可以用obj.xxx，当属性名是个变量时，可以使用obj[xxx]
    const seatTypes = [];
    for (let KEY in SEAT_TYPE) {
      let key = KEY.toLowerCase();
      if (dailyTrainTicket[key] >= 0) {
        seatTypes.push({
          type: KEY,
          code: SEAT_TYPE[KEY]["code"],
          desc: SEAT_TYPE[KEY]["desc"],
          count: dailyTrainTicket[key],
          price: dailyTrainTicket[key + 'Price'],
        })
      }
    }
    console.log("本车次提供的座位：", seatTypes)
    // 购票列表，用于界面展示，并传递到后端接口，用来描述：哪个乘客购买什么座位的票
    // {
    //   passengerId: 123,
    //   passengerType: "1",
    //   passengerName: "张三",
    //   passengerIdCard: "12323132132",
    //   seatTypeCode: "1",
    //   seat: "C1"
    // }
    const tickets = ref([]);
    const PASSENGER_TYPE_ARRAY = window.PASSENGER_TYPE_ARRAY;
    const visible = ref(false);
    const lineModalVisible = ref(false);
    const confirmOrderId = ref();
    const confirmOrderLineCount = ref(-1);
    const lineNumber = ref(5);

    // 勾选或去掉某个乘客时，在购票列表中加上或去掉一张表
    watch(() => passengerChecks.value, (newVal, oldVal)=>{
      console.log("勾选乘客发生变化", newVal, oldVal)
      // 每次有变化时，把购票列表清空，重新构造列表
      tickets.value = [];
      passengerChecks.value.forEach((item) => tickets.value.push({
        passengerId: item.id,
        passengerType: item.type,
        seatTypeCode: seatTypes[0].code,
        passengerName: item.name,
        passengerIdCard: item.idCard
      }))
    }, {immediate: true});

    // 0：不支持选座；1：选一等座；2：选二等座
    const chooseSeatType = ref(0);
    // 根据选择的座位类型，计算出对应的列，比如要选的是一等座，就筛选出ACDF，要选的是二等座，就筛选出ABCDF
    const SEAT_COL_ARRAY = computed(() => {
      return window.SEAT_COL_ARRAY.filter(item => item.type === chooseSeatType.value);
    });
    // 选择的座位
    // {
    //   A1: false, C1: true，D1: false, F1: false，
    //   A2: false, C2: false，D2: true, F2: false
    // }
    const chooseSeatObj = ref({});
    watch(() => SEAT_COL_ARRAY.value, () => {
      chooseSeatObj.value = {};
      for (let i = 1; i <= 2; i++) {
        SEAT_COL_ARRAY.value.forEach((item) => {
          chooseSeatObj.value[item.code + i] = false;
        })
      }
      console.log("初始化两排座位，都是未选中：", chooseSeatObj.value);
    }, {immediate: true});

    const handleQueryPassenger = () => {
      axios.get("/member/passenger/query-mine").then((response) => {
        let data = response.data;
        if (data.success) {
          passengers.value = data.content;
          passengers.value.forEach((item) => passengerOptions.value.push({
            label: item.name,
            value: item
          }))
        } else {
          notification.error({description: data.message});
        }
      });
    };

    const finishCheckPassenger = () => {
      console.log("购票列表：", tickets.value);

      if (tickets.value.length > 5) {
        notification.error({description: '最多只能购买5张车票'});
        return;
      }

      // 校验余票是否充足，购票列表中的每个座位类型，都去车次座位余票信息中，看余票是否充足
      // 前端校验不一定准，但前端校验可以减轻后端很多压力
      // 注意：这段只是校验，必须copy出seatTypesTemp变量来扣减，用原始的seatTypes去扣减，会影响真实的库存
      let seatTypesTemp = Tool.copy(seatTypes);
      for (let i = 0; i < tickets.value.length; i++) {
        let ticket = tickets.value[i];
        for (let j = 0; j < seatTypesTemp.length; j++) {
          let seatType = seatTypesTemp[j];
          // 同类型座位余票-1，这里扣减的是临时copy出来的库存，不是真正的库存，只是为了校验
          if (ticket.seatTypeCode === seatType.code) {
            seatType.count--;
            if (seatType.count < 0) {
              notification.error({description: seatType.desc + '余票不足'});
              return;
            }
          }
        }
      }
      console.log("前端余票校验通过");

      // 判断是否支持选座，只有纯一等座和纯二等座支持选座
      // 先筛选出购票列表中的所有座位类型，比如四张表：[1, 1, 2, 2]
      let ticketSeatTypeCodes = [];
      for (let i = 0; i < tickets.value.length; i++) {
        let ticket = tickets.value[i];
        ticketSeatTypeCodes.push(ticket.seatTypeCode);
      }
      // 为购票列表中的所有座位类型去重：[1, 2]
      const ticketSeatTypeCodesSet = Array.from(new Set(ticketSeatTypeCodes));
      console.log("选好的座位类型：", ticketSeatTypeCodesSet);
      if (ticketSeatTypeCodesSet.length !== 1) {
        console.log("选了多种座位，不支持选座");
        chooseSeatType.value = 0;
      } else {
        // ticketSeatTypeCodesSet.length === 1，即只选择了一种座位（不是一个座位，是一种座位）
        if (ticketSeatTypeCodesSet[0] === SEAT_TYPE.YDZ.code) {
          console.log("一等座选座");
          chooseSeatType.value = SEAT_TYPE.YDZ.code;
        } else if (ticketSeatTypeCodesSet[0] === SEAT_TYPE.EDZ.code) {
          console.log("二等座选座");
          chooseSeatType.value = SEAT_TYPE.EDZ.code;
        } else {
          console.log("不是一等座或二等座，不支持选座");
          chooseSeatType.value = 0;
        }

        // 余票小于20张时，不允许选座，否则选座成功率不高，影响出票
        if (chooseSeatType.value !== 0) {
          for (let i = 0; i < seatTypes.length; i++) {
            let seatType = seatTypes[i];
            // 找到同类型座位
            if (ticketSeatTypeCodesSet[0] === seatType.code) {
              // 判断余票，小于20张就不支持选座
              if (seatType.count < 20) {
                console.log("余票小于20张就不支持选座")
                chooseSeatType.value = 0;
                break;
              }
            }
          }
        }
      }

      // 弹出确认界面
      visible.value = true;

    };

    const handleOk = () => {
      if (Tool.isEmpty(imageCode.value)) {
        notification.error({description: '验证码不能为空'});
        return;
      }

      console.log("选好的座位：", chooseSeatObj.value);

      // 设置每张票的座位
      // 先清空购票列表的座位，有可能之前选了并设置座位了，但选座数不对被拦截了，又重新选一遍
      for (let i = 0; i < tickets.value.length; i++) {
        tickets.value[i].seat = null;
      }
      let i = -1;
      // 要么不选座位，要么所选座位应该等于购票数，即i === (tickets.value.length - 1)
      for (let key in chooseSeatObj.value) {
        if (chooseSeatObj.value[key]) {
          i++;
          if (i > tickets.value.length - 1) {
            notification.error({description: '所选座位数大于购票数'});
            return;
          }
          tickets.value[i].seat = key;
        }
      }
      if (i > -1 && i < (tickets.value.length - 1)) {
        notification.error({description: '所选座位数小于购票数'});
        return;
      }

      console.log("最终购票：", tickets.value);

      axios.post("/business/confirm-order/do", {
        dailyTrainTicketId: dailyTrainTicket.id,
        date: dailyTrainTicket.date,
        trainCode: dailyTrainTicket.trainCode,
        start: dailyTrainTicket.start,
        end: dailyTrainTicket.end,
        tickets: tickets.value,
        imageCodeToken: imageCodeToken.value,
        imageCode: imageCode.value,
        lineNumber: lineNumber.value
      }).then((response) => {
        let data = response.data;
        if (data.success) {
          // notification.success({description: "下单成功！"});
          visible.value = false;
          imageCodeModalVisible.value = false;
          lineModalVisible.value = true;
          confirmOrderId.value = data.content;
          queryLineCount();
        } else {
          notification.error({description: data.message});
        }
      });
    }

    /* ------------------- 定时查询订单状态 --------------------- */
    // 确认订单后定时查询
    let queryLineCountInterval;

    // 定时查询订单结果/排队数量
    const queryLineCount = () => {
      confirmOrderLineCount.value = -1;
      queryLineCountInterval = setInterval(function () {
        axios.get("/business/confirm-order/query-line-count/" + confirmOrderId.value).then((response) => {
          let data = response.data;
          if (data.success) {
            let result = data.content;
            switch (result) {
              case -1 :
                notification.success({description: "购票成功！"});
                lineModalVisible.value = false;
                clearInterval(queryLineCountInterval);
                break;
              case -2:
                notification.error({description: "购票失败！"});
                lineModalVisible.value = false;
                clearInterval(queryLineCountInterval);
                break;
              case -3:
                notification.error({description: "抱歉，没票了！"});
                lineModalVisible.value = false;
                clearInterval(queryLineCountInterval);
                break;
              default:
                confirmOrderLineCount.value = result;
            }
          } else {
            notification.error({description: data.message});
          }
        });
      }, 500);
    };

    /* ------------------- 第二层验证码 --------------------- */
    const imageCodeModalVisible = ref();
    const imageCodeToken = ref();
    const imageCodeSrc = ref();
    const imageCode = ref();
    /**
     * 加载图形验证码
     */
    const loadImageCode = () => {
      imageCodeToken.value = Tool.uuid(8);
      imageCodeSrc.value = process.env.VUE_APP_SERVER + '/business/kaptcha/image-code/' + imageCodeToken.value;
    };

    const showImageCodeModal = () => {
      loadImageCode();
      imageCodeModalVisible.value = true;
    };

    /* ------------------- 第一层验证码 --------------------- */
    const firstImageCodeSourceA = ref();
    const firstImageCodeSourceB = ref();
    const firstImageCodeTarget = ref();
    const firstImageCodeModalVisible = ref();

    /**
     * 加载第一层验证码
     */
    const loadFirstImageCode = () => {
      // 获取1~10的数：Math.floor(Math.random()*10 + 1)
      firstImageCodeSourceA.value = Math.floor(Math.random()*10 + 1) + 10;
      firstImageCodeSourceB.value = Math.floor(Math.random()*10 + 1) + 20;
    };

    /**
     * 显示第一层验证码弹出框
     */
    const showFirstImageCodeModal = () => {
      loadFirstImageCode();
      firstImageCodeModalVisible.value = true;
    };

    /**
     * 校验第一层验证码
     */
    const validFirstImageCode = () => {
      if (parseInt(firstImageCodeTarget.value) === parseInt(firstImageCodeSourceA.value + firstImageCodeSourceB.value)) {
        // 第一层验证通过
        firstImageCodeModalVisible.value = false;
        showImageCodeModal();
      } else {
        notification.error({description: '验证码错误'});
      }
    };

    /**
     * 取消排队
     */
    const onCancelOrder = () => {
      axios.get("/business/confirm-order/cancel/" + confirmOrderId.value).then((response) => {
        let data = response.data;
        if (data.success) {
          let result = data.content;
          if (result === 1) {
            notification.success({description: "取消成功！"});
            // 取消成功时，不用再轮询排队结果
            clearInterval(queryLineCountInterval);
            lineModalVisible.value = false;
          } else {
            notification.error({description: "取消失败！"});
          }
        } else {
          notification.error({description: data.message});
        }
      });
    };

    onMounted(() => {
      handleQueryPassenger();
    });

    return {
      passengers,
      dailyTrainTicket,
      seatTypes,
      passengerOptions,
      passengerChecks,
      tickets,
      PASSENGER_TYPE_ARRAY,
      visible,
      finishCheckPassenger,
      chooseSeatType,
      chooseSeatObj,
      SEAT_COL_ARRAY,
      handleOk,
      imageCodeToken,
      imageCodeSrc,
      imageCode,
      showImageCodeModal,
      imageCodeModalVisible,
      loadImageCode,
      firstImageCodeSourceA,
      firstImageCodeSourceB,
      firstImageCodeTarget,
      firstImageCodeModalVisible,
      showFirstImageCodeModal,
      validFirstImageCode,
      lineModalVisible,
      confirmOrderId,
      confirmOrderLineCount,
      onCancelOrder,
      lineNumber
    };
  },
});
</script>

<style>
.order-train .order-train-main {
  font-size: 18px;
  font-weight: bold;
}
.order-train .order-train-ticket {
  margin-top: 15px;
}
.order-train .order-train-ticket .order-train-ticket-main {
  color: red;
  font-size: 18px;
}

.order-tickets {
  margin: 10px 0;
}
.order-tickets .ant-col {
  padding: 5px 10px;
}
.order-tickets .order-tickets-header {
  background-color: cornflowerblue;
  border: solid 1px cornflowerblue;
  color: white;
  font-size: 16px;
  padding: 5px 0;
}
.order-tickets .order-tickets-row {
  border: solid 1px cornflowerblue;
  border-top: none;
  vertical-align: middle;
  line-height: 30px;
}

.order-tickets .choose-seat-item {
  margin: 5px 5px;
}
</style>

效果

在这里插入图片描述

4.增加座位销售图

额外的功能，最终展现类似电影院座位销售图的效果

1.增加查询座位销售详情接口

com.neilxu.train.business.req.SeatSellReq

package com.neilxu.train.business.req;

import jakarta.validation.constraints.NotNull;
import lombok.Data;
import org.springframework.format.annotation.DateTimeFormat;

import java.util.Date;

@Data
public class SeatSellReq {

    /**
     * 日期
     */
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    @NotNull(message = "【日期】不能为空")
    private Date date;

    /**
     * 车次编号
     */
    @NotNull(message = "【车次编号】不能为空")
    private String trainCode;

}

com.neilxu.train.business.resp.SeatSellResp

package com.neilxu.train.business.resp;

import lombok.Data;

@Data
public class SeatSellResp {

    /**
     * 箱序
     */
    private Integer carriageIndex;

    /**
     * 排号|01, 02
     */
    private String row;

    /**
     * 列号|枚举[SeatColEnum]
     */
    private String col;

    /**
     * 座位类型|枚举[SeatTypeEnum]
     */
    private String seatType;

    /**
     * 售卖情况|将经过的车站用01拼接，0表示可卖，1表示已卖
     */
    private String sell;

}

com.neilxu.train.business.service.DailyTrainSeatService

/**
 * 查询某日某车次的所有座位
 */
public List<SeatSellResp> querySeatSell(SeatSellReq req) {
    Date date = req.getDate();
    String trainCode = req.getTrainCode();
    LOG.info("查询日期【{}】车次【{}】的座位销售信息", DateUtil.formatDate(date), trainCode);
    DailyTrainSeatExample dailyTrainSeatExample = new DailyTrainSeatExample();
    dailyTrainSeatExample.setOrderByClause("`carriage_index` asc, carriage_seat_index asc");
    dailyTrainSeatExample.createCriteria()
            .andDateEqualTo(date)
            .andTrainCodeEqualTo(trainCode);
    return BeanUtil.copyToList(dailyTrainSeatMapper.selectByExample(dailyTrainSeatExample), SeatSellResp.class);
}

com.neilxu.train.business.controller.SeatSellController

package com.neilxu.train.business.controller;

import com.neilxu.train.business.req.SeatSellReq;
import com.neilxu.train.business.resp.SeatSellResp;
import com.neilxu.train.business.service.DailyTrainSeatService;
import com.neilxu.train.common.resp.CommonResp;
import jakarta.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

;

@RestController
@RequestMapping("/seat-sell")
public class SeatSellController {

    @Autowired
    private DailyTrainSeatService dailyTrainSeatService;

    @GetMapping("/query")
    public CommonResp<List<SeatSellResp>> query(@Valid SeatSellReq req) {
        List<SeatSellResp> seatList = dailyTrainSeatService.querySeatSell(req);
        return new CommonResp<>(seatList);
    }

}

测试

http/business-seat.http

GET http://localhost:8000/business/seat-sell/query?date=2024-04-10&trainCode=D2
Accept: application/json
token: {{token}}

###

在这里插入图片描述

2.增加座位销售图路由及页面，实现页面跳转和参数传递

web/src/views/main/seat.vue

<template>
  <div v-if="!param.date">
    请到余票查询里选择一趟列车，
    <router-link to="/ticket">
      跳转到余票查询
    </router-link>
  </div>
  <div v-else>
    <p>
      日期：{{param.date}}，车次：{{param.trainCode}}，出发站：{{param.start}}，到达站：{{param.end}}
    </p>
  </div>
</template>

<script>

import { defineComponent, ref } from 'vue';
import {useRoute} from "vue-router";

export default defineComponent({
  name: "welcome-view",
  setup() {
    const route = useRoute();
    const param = ref({});
    param.value = route.query;

    return {
      param
    };
  },
});
</script>

增加路由、侧边栏、顶部菜单栏

操作同之前

web/src/views/main/ticket.vue

<template>
  <p>
    <a-space>
      <a-date-picker v-model:value="params.date" valueFormat="YYYY-MM-DD" placeholder="请选择日期"></a-date-picker>
      <station-select-view v-model="params.start" width="200px"></station-select-view>
      <station-select-view v-model="params.end" width="200px"></station-select-view>
      <a-button type="primary" @click="handleQuery()">查找</a-button>
    </a-space>
  </p>
  <a-table :dataSource="dailyTrainTickets"
           :columns="columns"
           :pagination="pagination"
           @change="handleTableChange"
           :loading="loading">
    <template #bodyCell="{ column, record }">
      <template v-if="column.dataIndex === 'operation'">
        <a-space>
          <a-button type="primary" @click="toOrder(record)">预订</a-button>
          <router-link :to="{
            path: '/seat',
            query: {
              date: record.date,
              trainCode: record.trainCode,
              start: record.start,
              startIndex: record.startIndex,
              end: record.end,
              endIndex: record.endIndex
            }
          }">
            <a-button type="primary">座位销售图</a-button>
          </router-link>
          <a-button type="primary" @click="showStation(record)">途经车站</a-button>
        </a-space>
      </template>
      <template v-else-if="column.dataIndex === 'station'">
        {{record.start}}<br/>
        {{record.end}}
      </template>
      <template v-else-if="column.dataIndex === 'time'">
        {{record.startTime}}<br/>
        {{record.endTime}}
      </template>
      <template v-else-if="column.dataIndex === 'duration'">
        {{calDuration(record.startTime, record.endTime)}}<br/>
        <div v-if="record.startTime.replaceAll(':', '') >= record.endTime.replaceAll(':', '')">
          次日到达
        </div>
        <div v-else>
          当日到达
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'ydz'">
        <div v-if="record.ydz >= 0">
          {{record.ydz}}<br/>
          {{record.ydzPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'edz'">
        <div v-if="record.edz >= 0">
          {{record.edz}}<br/>
          {{record.edzPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'rw'">
        <div v-if="record.rw >= 0">
          {{record.rw}}<br/>
          {{record.rwPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'yw'">
        <div v-if="record.yw >= 0">
          {{record.yw}}<br/>
          {{record.ywPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
    </template>
  </a-table>

  <!-- 途经车站 -->
  <a-modal style="top: 30px" v-model:visible="visible" :title="null" :footer="null" :closable="false">
    <a-table :data-source="stations" :pagination="false">
      <a-table-column key="index" title="站序" data-index="index" />
      <a-table-column key="name" title="站名" data-index="name" />
      <a-table-column key="inTime" title="进站时间" data-index="inTime">
        <template #default="{ record }">
          {{record.index === 0 ? '-' : record.inTime}}
        </template>
      </a-table-column>
      <a-table-column key="outTime" title="出站时间" data-index="outTime">
        <template #default="{ record }">
          {{record.index === (stations.length - 1) ? '-' : record.outTime}}
        </template>
      </a-table-column>
      <a-table-column key="stopTime" title="停站时长" data-index="stopTime">
        <template #default="{ record }">
          {{record.index === 0 || record.index === (stations.length - 1) ? '-' : record.stopTime}}
        </template>
      </a-table-column>
    </a-table>
  </a-modal>
</template>

<script>
import { defineComponent, ref, onMounted } from 'vue';
import {notification} from "ant-design-vue";
import axios from "axios";
import StationSelectView from "@/components/station-select";
import dayjs from "dayjs";
import router from "@/router";

export default defineComponent({
  name: "ticket-view",
  components: {StationSelectView},
  setup() {
    const visible = ref(false);
    let dailyTrainTicket = ref({
      id: undefined,
      date: undefined,
      trainCode: undefined,
      start: undefined,
      startPinyin: undefined,
      startTime: undefined,
      startIndex: undefined,
      end: undefined,
      endPinyin: undefined,
      endTime: undefined,
      endIndex: undefined,
      ydz: undefined,
      ydzPrice: undefined,
      edz: undefined,
      edzPrice: undefined,
      rw: undefined,
      rwPrice: undefined,
      yw: undefined,
      ywPrice: undefined,
      createTime: undefined,
      updateTime: undefined,
    });
    const dailyTrainTickets = ref([]);
    // 分页的三个属性名是固定的
    const pagination = ref({
      total: 0,
      current: 1,
      pageSize: 10,
    });
    let loading = ref(false);
    const params = ref({});
    const columns = [
      {
        title: '车次编号',
        dataIndex: 'trainCode',
        key: 'trainCode',
      },
      {
        title: '车站',
        dataIndex: 'station',
      },
      {
        title: '时间',
        dataIndex: 'time',
      },
      {
        title: '历时',
        dataIndex: 'duration',
      },
      {
        title: '一等座',
        dataIndex: 'ydz',
        key: 'ydz',
      },
      {
        title: '二等座',
        dataIndex: 'edz',
        key: 'edz',
      },
      {
        title: '软卧',
        dataIndex: 'rw',
        key: 'rw',
      },
      {
        title: '硬卧',
        dataIndex: 'yw',
        key: 'yw',
      },
      {
        title: '操作',
        dataIndex: 'operation',
      },
    ];


    const handleQuery = (param) => {
      if (Tool.isEmpty(params.value.date)) {
        notification.error({description: "请输入日期"});
        return;
      }
      if (Tool.isEmpty(params.value.start)) {
        notification.error({description: "请输入出发地"});
        return;
      }
      if (Tool.isEmpty(params.value.end)) {
        notification.error({description: "请输入目的地"});
        return;
      }
      if (!param) {
        param = {
          page: 1,
          size: pagination.value.pageSize
        };
      }

      // 保存查询参数
      SessionStorage.set(SESSION_TICKET_PARAMS, params.value);

      loading.value = true;
      axios.get("/business/daily-train-ticket/query-list", {
        params: {
          page: param.page,
          size: param.size,
          trainCode: params.value.trainCode,
          date: params.value.date,
          start: params.value.start,
          end: params.value.end
        }
      }).then((response) => {
        loading.value = false;
        let data = response.data;
        if (data.success) {
          dailyTrainTickets.value = data.content.list;
          // 设置分页控件的值
          pagination.value.current = param.page;
          pagination.value.total = data.content.total;
        } else {
          notification.error({description: data.message});
        }
      });
    };

    const handleTableChange = (page) => {
      // console.log("看看自带的分页参数都有啥：" + JSON.stringify(page));
      pagination.value.pageSize = page.pageSize;
      handleQuery({
        page: page.current,
        size: page.pageSize
      });
    };

    const calDuration = (startTime, endTime) => {
      let diff = dayjs(endTime, 'HH:mm:ss').diff(dayjs(startTime, 'HH:mm:ss'), 'seconds');
      return dayjs('00:00:00', 'HH:mm:ss').second(diff).format('HH:mm:ss');
    };

    const toOrder = (record) => {
      dailyTrainTicket.value = Tool.copy(record);
      SessionStorage.set(SESSION_ORDER, dailyTrainTicket.value);
      router.push("/order")
    };

    // ---------------------- 途经车站 ----------------------
    const stations = ref([]);
    const showStation = record => {
      visible.value = true;
      axios.get("/business/daily-train-station/query-by-train-code", {
        params: {
          date: record.date,
          trainCode: record.trainCode
        }
      }).then((response) => {
        let data = response.data;
        if (data.success) {
          stations.value = data.content;
        } else {
          notification.error({description: data.message});
        }
      });
    };

    onMounted(() => {
      //  "|| {}"是常用技巧，可以避免空指针异常
      params.value = SessionStorage.get(SESSION_TICKET_PARAMS) || {};
      if (Tool.isNotEmpty(params.value)) {
        handleQuery({
          page: 1,
          size: pagination.value.pageSize
        });
      }
    });

    return {
      dailyTrainTicket,
      visible,
      dailyTrainTickets,
      pagination,
      columns,
      handleTableChange,
      handleQuery,
      loading,
      params,
      calDuration,
      toOrder,
      showStation,
      stations
    };
  },
});
</script>

3.座位销售图页面获得销售信息，同一趟车，不管查哪个区间，查到的销售信息是一样的，由界面再去截取区间的销售信息。功能设计经验：对于复杂的操作，能放到前端的都放到前端，减小后端的压力。

web/src/views/main/seat.vue

<template>
  <div v-if="!param.date">
    请到余票查询里选择一趟列车，
    <router-link to="/ticket">
      跳转到余票查询
    </router-link>
  </div>
  <div v-else>
    <p>
      日期：{{param.date}}，车次：{{param.trainCode}}，出发站：{{param.start}}，到达站：{{param.end}}
    </p>
    <p>
      {{list}}
    </p>
  </div>
</template>

<script>

import { defineComponent, ref, onMounted } from 'vue';
import axios from "axios";
import {notification} from "ant-design-vue";
import {useRoute} from "vue-router";

export default defineComponent({
  name: "welcome-view",
  setup() {
    const route = useRoute();
    const param = ref({});
    param.value = route.query;
    const list = ref();

    // 查询一列火车的所有销售信息
    const querySeat = () => {
      axios.get("/business/seat-sell/query", {
        params: {
          date: param.value.date,
          trainCode: param.value.trainCode,
        }
      }).then((response) => {
        let data = response.data;
        if (data.success) {
          list.value = data.content;
        } else {
          notification.error({description: data.message});
        }
      });
    };

    onMounted(() => {
      if (param.value.date) {
        querySeat();
      }
    });

    return {
      param,
      querySeat,
      list
    };
  },
});
</script>

4.显示各车厢各座位的销售详情，使用橙色灰色代码座位可卖与卖出

train-station.vue

<a-form-item label="站序">
  <a-input v-model:value="trainStation.index" />
  <span style="color: red">重要：第1站是0，对显示销售图有影响</span>
</a-form-item>

seat.vue

<template>
  <div v-if="!param.date">
    请到余票查询里选择一趟列车，
    <router-link to="/ticket">
      跳转到余票查询
    </router-link>
  </div>
  <div v-else>
    <p style="font-weight: bold;">
      日期：{{param.date}}，车次：{{param.trainCode}}，出发站：{{param.start}}，到达站：{{param.end}}
    </p>

    <table>
      <tr>
        <td style="width: 25px; background: #FF9900;"></td>
        <td>：已被购买</td>
        <td style="width: 20px;"></td>
        <td style="width: 25px; background: #999999;"></td>
        <td>：未被购买</td>
      </tr>
    </table>
    <br>
    <div v-for="(seatObj, carriage) in train" :key="carriage"
         style="border: 3px solid #99CCFF;
                 margin-bottom: 30px;
                 padding: 5px;
                 border-radius: 4px">
      <div style="display:block;
                  width:50px;
                  height:10px;
                  position:relative;
                  top:-15px;
                  text-align: center;
                  background: white;">
        {{carriage}}
      </div>
      <table>
        <tr>
          <td v-for="(sell, index) in Object.values(seatObj)[0]" :key="index"
              style="text-align: center">
            {{index + 1}}
          </td>
        </tr>
        <tr v-for="(sellList, col) in seatObj" :key="col">
          <td v-for="(sell, index) in sellList" :key="index"
              style="text-align: center;
                      border: 2px solid white;
                      background: grey;
                      padding: 0 4px;
                      color: white;
                      "
              :style="{background: (sell > 0 ? '#FF9900' : '#999999')}">{{col}}</td>
        </tr>
      </table>
    </div>
  </div>
</template>

<script>

import {defineComponent, onMounted, ref} from 'vue';
import axios from "axios";
import {notification} from "ant-design-vue";
import {useRoute} from "vue-router";

export default defineComponent({
  name: "seat-view",
  setup() {
    const route = useRoute();
    const param = ref({});
    param.value = route.query;
    const list = ref();
    // 使用对象更便于组装数组，三维数组只能存储最终的01，不能存储“车箱1”，“A”这些数据
    // {
    //   "车箱1": {
    //      "A" : ["000", "001", "001", "001"],
    //      "B" : ["000", "001", "001", "001"],
    //      "C" : ["000", "001", "001", "001"],
    //      "D" : ["000", "001", "001", "001"]
    //    }, "车箱2": {
    //      "A" : ["000", "001", "001", "001"],
    //      "B" : ["000", "001", "001", "001"],
    //      "C" : ["000", "001", "001", "001"],
    //      "D" : ["000", "001", "001", "001"],
    //      "D" : ["000", "001", "001", "001"]
    //    }
    // }
    let train = ref({});

    // 查询一列火车的所有车站
    const querySeat = () => {
      axios.get("/business/seat-sell/query", {
        params: {
          date: param.value.date,
          trainCode: param.value.trainCode,
        }
      }).then((response) => {
        let data = response.data;
        if (data.success) {
          list.value = data.content;
          format();
        } else {
          notification.error({description: data.message});
        }
      });
    };

    /**
     * 截取出当前区间的销售信息，并判断是否有票
     */
    const format = () => {
      let _train = {};

      for (let i = 0; i < list.value.length; i++) {
        let item = list.value[i];

        // 计算当前区间是否还有票，约定：站序是从0开始
        let sellDB = item.sell;

        // 假设6站：start = 1, end = 3, sellDB = 11111，最终得到：sell = 01110，转int 1100，不可买
        // 假设6站：start = 1, end = 3, sellDB = 11011，最终得到：sell = 01010，转int 1000，不可买
        // 假设6站：start = 1, end = 3, sellDB = 10001，最终得到：sell = 00000，转int 0，可买
        // 验证代码：
        // let sellDB = "123456789";
        // let start = 1;
        // let end = 3;
        // let sell = sellDB.substr(start, end - start)
        // console.log(sell)
        let sell = sellDB.substr(param.value.startIndex, param.value.endIndex - param.value.startIndex);
        // console.log("完整的销卖信息：", sellDB, "区间内的销卖信息", sell);

        // 将sell放入火车数据中
        if (!_train["车箱" + item.carriageIndex]) {
          _train["车箱" + item.carriageIndex] = {};
        }
        if (!_train["车箱" + item.carriageIndex][item.col]) {
          _train["车箱" + item.carriageIndex][item.col] = [];
        }
        _train["车箱" + item.carriageIndex][item.col].push(parseInt(sell));
      }

      train.value = _train;
    }

    onMounted(() => {
      if (param.value.date) {
        querySeat();
      }
    });

    return {
      param,
      train
    };
  },
});
</script>

测试效果

在这里插入图片描述

三、只允许购买两周内的车次

ticket.vue

<template>
  <p>
    <a-space>
      <a-date-picker v-model:value="params.date" valueFormat="YYYY-MM-DD" :disabled-date="disabledDate" placeholder="请选择日期"></a-date-picker>
      <station-select-view v-model="params.start" width="200px"></station-select-view>
      <station-select-view v-model="params.end" width="200px"></station-select-view>
      <a-button type="primary" @click="handleQuery()">查找</a-button>
    </a-space>
  </p>
  <a-table :dataSource="dailyTrainTickets"
           :columns="columns"
           :pagination="pagination"
           @change="handleTableChange"
           :loading="loading">
    <template #bodyCell="{ column, record }">
      <template v-if="column.dataIndex === 'operation'">
        <a-space>
          <a-button type="primary" @click="toOrder(record)" :disabled="isExpire(record)">{{isExpire(record) ? "过期" : "预订"}}</a-button>
          <router-link :to="{
            path: '/seat',
            query: {
              date: record.date,
              trainCode: record.trainCode,
              start: record.start,
              startIndex: record.startIndex,
              end: record.end,
              endIndex: record.endIndex
            }
          }">
            <a-button type="primary">座位销售图</a-button>
          </router-link>
          <a-button type="primary" @click="showStation(record)">途经车站</a-button>
        </a-space>
      </template>
      <template v-else-if="column.dataIndex === 'station'">
        {{record.start}}<br/>
        {{record.end}}
      </template>
      <template v-else-if="column.dataIndex === 'time'">
        {{record.startTime}}<br/>
        {{record.endTime}}
      </template>
      <template v-else-if="column.dataIndex === 'duration'">
        {{calDuration(record.startTime, record.endTime)}}<br/>
        <div v-if="record.startTime.replaceAll(':', '') >= record.endTime.replaceAll(':', '')">
          次日到达
        </div>
        <div v-else>
          当日到达
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'ydz'">
        <div v-if="record.ydz >= 0">
          {{record.ydz}}<br/>
          {{record.ydzPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'edz'">
        <div v-if="record.edz >= 0">
          {{record.edz}}<br/>
          {{record.edzPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'rw'">
        <div v-if="record.rw >= 0">
          {{record.rw}}<br/>
          {{record.rwPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
      <template v-else-if="column.dataIndex === 'yw'">
        <div v-if="record.yw >= 0">
          {{record.yw}}<br/>
          {{record.ywPrice}}￥
        </div>
        <div v-else>
          --
        </div>
      </template>
    </template>
  </a-table>

  <!-- 途经车站 -->
  <a-modal style="top: 30px" v-model:visible="visible" :title="null" :footer="null" :closable="false">
    <a-table :data-source="stations" :pagination="false">
      <a-table-column key="index" title="站序" data-index="index" />
      <a-table-column key="name" title="站名" data-index="name" />
      <a-table-column key="inTime" title="进站时间" data-index="inTime">
        <template #default="{ record }">
          {{record.index === 0 ? '-' : record.inTime}}
        </template>
      </a-table-column>
      <a-table-column key="outTime" title="出站时间" data-index="outTime">
        <template #default="{ record }">
          {{record.index === (stations.length - 1) ? '-' : record.outTime}}
        </template>
      </a-table-column>
      <a-table-column key="stopTime" title="停站时长" data-index="stopTime">
        <template #default="{ record }">
          {{record.index === 0 || record.index === (stations.length - 1) ? '-' : record.stopTime}}
        </template>
      </a-table-column>
    </a-table>
  </a-modal>
</template>

<script>
import { defineComponent, ref, onMounted } from 'vue';
import {notification} from "ant-design-vue";
import axios from "axios";
import StationSelectView from "@/components/station-select";
import dayjs from "dayjs";
import router from "@/router";

export default defineComponent({
  name: "ticket-view",
  components: {StationSelectView},
  setup() {
    const visible = ref(false);
    let dailyTrainTicket = ref({
      id: undefined,
      date: undefined,
      trainCode: undefined,
      start: undefined,
      startPinyin: undefined,
      startTime: undefined,
      startIndex: undefined,
      end: undefined,
      endPinyin: undefined,
      endTime: undefined,
      endIndex: undefined,
      ydz: undefined,
      ydzPrice: undefined,
      edz: undefined,
      edzPrice: undefined,
      rw: undefined,
      rwPrice: undefined,
      yw: undefined,
      ywPrice: undefined,
      createTime: undefined,
      updateTime: undefined,
    });
    const dailyTrainTickets = ref([]);
    // 分页的三个属性名是固定的
    const pagination = ref({
      total: 0,
      current: 1,
      pageSize: 10,
    });
    let loading = ref(false);
    const params = ref({});
    const columns = [
      {
        title: '车次编号',
        dataIndex: 'trainCode',
        key: 'trainCode',
      },
      {
        title: '车站',
        dataIndex: 'station',
      },
      {
        title: '时间',
        dataIndex: 'time',
      },
      {
        title: '历时',
        dataIndex: 'duration',
      },
      {
        title: '一等座',
        dataIndex: 'ydz',
        key: 'ydz',
      },
      {
        title: '二等座',
        dataIndex: 'edz',
        key: 'edz',
      },
      {
        title: '软卧',
        dataIndex: 'rw',
        key: 'rw',
      },
      {
        title: '硬卧',
        dataIndex: 'yw',
        key: 'yw',
      },
      {
        title: '操作',
        dataIndex: 'operation',
      },
    ];


    const handleQuery = (param) => {
      if (Tool.isEmpty(params.value.date)) {
        notification.error({description: "请输入日期"});
        return;
      }
      if (Tool.isEmpty(params.value.start)) {
        notification.error({description: "请输入出发地"});
        return;
      }
      if (Tool.isEmpty(params.value.end)) {
        notification.error({description: "请输入目的地"});
        return;
      }
      if (!param) {
        param = {
          page: 1,
          size: pagination.value.pageSize
        };
      }

      // 保存查询参数
      SessionStorage.set(SESSION_TICKET_PARAMS, params.value);

      loading.value = true;
      axios.get("/business/daily-train-ticket/query-list", {
        params: {
          page: param.page,
          size: param.size,
          trainCode: params.value.trainCode,
          date: params.value.date,
          start: params.value.start,
          end: params.value.end
        }
      }).then((response) => {
        loading.value = false;
        let data = response.data;
        if (data.success) {
          dailyTrainTickets.value = data.content.list;
          // 设置分页控件的值
          pagination.value.current = param.page;
          pagination.value.total = data.content.total;
        } else {
          notification.error({description: data.message});
        }
      });
    };

    const handleTableChange = (page) => {
      // console.log("看看自带的分页参数都有啥：" + JSON.stringify(page));
      pagination.value.pageSize = page.pageSize;
      handleQuery({
        page: page.current,
        size: page.pageSize
      });
    };

    const calDuration = (startTime, endTime) => {
      let diff = dayjs(endTime, 'HH:mm:ss').diff(dayjs(startTime, 'HH:mm:ss'), 'seconds');
      return dayjs('00:00:00', 'HH:mm:ss').second(diff).format('HH:mm:ss');
    };

    const toOrder = (record) => {
      dailyTrainTicket.value = Tool.copy(record);
      SessionStorage.set(SESSION_ORDER, dailyTrainTicket.value);
      router.push("/order")
    };

    // ---------------------- 途经车站 ----------------------
    const stations = ref([]);
    const showStation = record => {
      visible.value = true;
      axios.get("/business/daily-train-station/query-by-train-code", {
        params: {
          date: record.date,
          trainCode: record.trainCode
        }
      }).then((response) => {
        let data = response.data;
        if (data.success) {
          stations.value = data.content;
        } else {
          notification.error({description: data.message});
        }
      });
    };

    // 不能选择今天以前及两周以后的日期
    const disabledDate = current => {
      return current && (current <= dayjs().add(-1, 'day') || current > dayjs().add(14, 'day'));
    };

    // 判断是否过期
    const isExpire = (record) => {
      // 标准时间：2000/01/01 00:00:00
      let startDateTimeString = record.date.replace(/-/g, "/") + " " + record.startTime;
      let startDateTime = new Date(startDateTimeString);

      //当前时间
      let now = new Date();

      console.log(startDateTime)
      return now.valueOf() >= startDateTime.valueOf();
    };

    onMounted(() => {
      //  "|| {}"是常用技巧，可以避免空指针异常
      params.value = SessionStorage.get(SESSION_TICKET_PARAMS) || {};
      if (Tool.isNotEmpty(params.value)) {
        handleQuery({
          page: 1,
          size: pagination.value.pageSize
        });
      }
    });

    return {
      dailyTrainTicket,
      visible,
      dailyTrainTickets,
      pagination,
      columns,
      handleTableChange,
      handleQuery,
      loading,
      params,
      calDuration,
      toOrder,
      showStation,
      stations,
      disabledDate,
      isExpire
    };
  },
});
</script>

效果

在这里插入图片描述