尚硅谷智慧校园 —— 1、简介及环境搭建

智慧校园管理系统：主要是以年级、班级为单位，进行老师和学生信息记录和统计功能。项目采用前后端分离架构思想，前端采用 HTML+CSS+VUE来实现页面效果展示，后端采用 SpringBoot+MybatisPlus 框架实现数据存储等服务。存储层使用高性能的 MySQL，服务器使用 SpringBoot 内置的Tomcat9.x，项目构建工具使用Maven来管理jar包和项目构建。

1.2、项目模块

1.3、使用的技术

2、环境搭建

2.1、使用 IDEA的 SpringBoot 创建一个Maven项目

设置好包名及存放位置即可，无需添加其他功能，后面会对 pom.xml 大改，其他功能通过 maven 添加即可

2.2、在 pom.xml 导入依赖

为了避免影响其他插件的使用，需要使用较低的 SpringBoot 的版本

由于我的数据库是 mysql5，导入的依赖也应该是 5.x 版本的

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <!-- 继承方式使用SpringBoot -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/>
    </parent>

    <groupId>com.zyj</groupId>
    <artifactId>myzhxy</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--单元测试启动器-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- thymeleaf支持-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <!--  mybatis-plus-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.1</version>
        </dependency>

        <!-- 简化POJO实体类开发 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!--mysql-->
        <!--<dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.3.1</version>
        </dependency>

        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.31</version>
        </dependency>

        <!--swagger-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.7.0</version>
        </dependency>

        <!--swagger ui-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.7.0</version>
        </dependency>

        <!--swagger2  增强版接口文档-->
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>knife4j-spring-boot-starter</artifactId>
            <version>2.0.4</version>
        </dependency>


        <!--开发者工具-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.29</version>
        </dependency>

        <!-- JWT生成Token-->
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.7.0</version>
        </dependency>

        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.4</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <!--spring boot maven插件 , 可以将项目运行依赖的jar包打到我们的项目中-->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2.3、准备目录结构

java目录下
1. config : 项目的配置类
2. controller: 控制层
3. mapper : 持久层接口
4. pojo : 实体类
5. service: 服务层
6. util: 工具类包
resources目录下
1. mapper :持久层映射文件
2. public/upload:文件上传目录
3. static: 静态资源目录
4. application.yml :SpringBoot核心配置文件

2.4、配置 application.yaml

server:
  port: 8080  #指定当前项目启动的端口号
spring:
  #解决SpringBoot2.6.0与swagger冲突问题【原因是在springboot2.6.0中将SpringMVC 默认路径匹配策略从AntPathMatcher 更改为PathPatternParser，导致出错，解决办法是切换回原先的AntPathMatcher】
  mvc:
    pathmatch:
      matching-strategy: ant_path_matcher
  #配置数据源
  datasource:
    #配置数据源类型
    type: com.zaxxer.hikari.HikariDataSource
    #配置数据库连接属性
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/zhxy_db?characterEncoding=utf-8&useSSL=false   #&serverTimezone=GMT%2B8
    username: root
    password: zyj123
    hikari:
      connection-test-query: SELECT 1
      connection-timeout: 60000
      idle-timeout: 500000
      max-lifetime: 540000
      maximum-pool-size: 12
      minimum-idle: 10
      pool-name: GuliHikariPool
  thymeleaf:
    #模板的模式，支持 HTML, XML TEXT JAVASCRIPT
    mode: HTML5
    #编码 可不用配置
    encoding: UTF-8
    #开发配置为false,避免修改模板还要重启服务器
    cache: false
    #配置模板路径，默认是templates，可以不用配置
    prefix: classpath:/static/
  jackson:
    # 时间格式
    date-format: yyyy-MM-dd HH:mm:ss
    # 时区
    time-zone: GMT+8
  servlet:
    #设置文件上传上限
    multipart:
      # 单个文件最大大小
      max-file-size: 10MB
      # 多个文件总共最大大小
      max-request-size: 100MB
mybatis-plus:
  configuration:
    #添加日志支持
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  mapper-locations: classpath*:/mapper/**/*.xml

2.5、准备分页插件的配置类

@Configuration
@MapperScan("com.zyj.myzhxy.mapper")
public class MyConfig {

    @Bean
    public PaginationInterceptor paginationInterceptor(){
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        return paginationInterceptor;
    }

}

2.6、准备 swagger2 的配置类

若想查看，需访问 localhost:端口号/swagger-ui.html

只有有 Api 相关的注解才会生成

@Api 标注在类上，示例：@Api(tags = "年级控制器")

@ApiOperation 标注在方法上，示例：@ApiOperation("(批量)删除年级信息")

@ApiParam 标注在方法参数上，示例：@ApiParam("要删除的年级信息的id的JSON集合") @RequestBody List<Integer> ids

import com.google.common.base.Predicates;
import io.swagger.annotations.ApiOperation;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.ParameterBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.schema.ModelRef;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.service.Parameter;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;
import java.util.List;

/**
 * Swagger2配置信息
 */
@Configuration
@EnableSwagger2
public class Swagger2Config {

    @Bean
    public Docket webApiConfig(){

        //添加head参数start
        List<Parameter> pars = new ArrayList<>();
        ParameterBuilder tokenPar = new ParameterBuilder();
        tokenPar.name("userId")
                .description("用户ID")
                .defaultValue("1")
                .modelRef(new ModelRef("string"))
                .parameterType("header")
                .required(false)
                .build();
        pars.add(tokenPar.build());

        ParameterBuilder tmpPar = new ParameterBuilder();
        tmpPar.name("userTempId")
                .description("临时用户ID")
                .defaultValue("1")
                .modelRef(new ModelRef("string"))
                .parameterType("header")
                .required(false)
                .build();
        pars.add(tmpPar.build());
        //添加head参数end

        return new Docket(DocumentationType.SWAGGER_2)
                .groupName("webApi")
                .apiInfo(webApiInfo())
                .select()
                //可以测试请求头中：输入token
                // 有 ApiOperation 注解才生成
                //.apis(RequestHandlerSelectors.withClassAnnotation(ApiOperation.class))
                // 扫描的基础包
                .apis(RequestHandlerSelectors.basePackage("com.zyj.myzhxy.controller"))
                //过滤掉admin路径下的所有页面
                //.paths(Predicates.and(PathSelectors.regex("/sms/.*")))
                //过滤掉所有error或error.*页面
                //.paths(Predicates.not(PathSelectors.regex("/error.*")))
                .build()
                .globalOperationParameters(pars);

    }



    private ApiInfo webApiInfo(){

        return new ApiInfoBuilder()
                .title("网站-API文档")
                .description("本文档描述了网站微服务接口定义")
                .version("1.0")
                .contact(new Contact("atguigu", "http://atguigu.com", "[email protected]"))
                .build();
    }

    private ApiInfo adminApiInfo(){

        return new ApiInfoBuilder()
                .title("后台管理系统-API文档")
                .description("本文档描述了后台管理系统微服务接口定义")
                .version("1.0")
                .contact(new Contact("atguigu", "http://atguigu.com", "[email protected]"))
                .build();
    }

}

2.7、准备 util 下的工具类

2.7.1、验证码图片工具类

import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.Random;

/**
 * @project: ssm_sms
 * @description: 绘制验证码图片
 */
public class CreateVerifiCodeImage {

    private static int WIDTH = 90;
    private static int HEIGHT = 35;
    private static int FONT_SIZE = 20; //字符大小
    private static char[] verifiCode; //验证码
    private static BufferedImage verifiCodeImage; //验证码图片

    /**
     * @description: 获取验证码图片
     * @param: no
     * @return: java.awt.image.BufferedImage
     */
    public static BufferedImage getVerifiCodeImage() {
        verifiCodeImage = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_BGR);// create a image
        Graphics graphics = verifiCodeImage.getGraphics();

        verifiCode = generateCheckCode();
        drawBackground(graphics);
        drawRands(graphics, verifiCode);

        graphics.dispose();

        return verifiCodeImage;
    }

    /**
     * @description: 获取验证码
     * @param: no
     * @return: char[]
     */
    public static char[] getVerifiCode() {
        return verifiCode;
    }

    /**
     * @description: 随机生成验证码
     * @param: no
     * @return: char[]
     */
    private static char[] generateCheckCode() {
        String chars = "0123456789abcdefghijklmnopqrstuvwxyz" + "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        char[] rands = new char[4];
        for (int i = 0; i < 4; i++) {
            int rand = (int) (Math.random() * (10 + 26 * 2));
            rands[i] = chars.charAt(rand);
        }
        return rands;
    }

    /**
     * @description: 绘制验证码
     * @param: g
     * @param: rands
     * @return: void
     */
    private static void drawRands(Graphics g, char[] rands) {
        g.setFont(new Font("Console", Font.BOLD, FONT_SIZE));

        for (int i = 0; i < rands.length; i++) {

            g.setColor(getRandomColor());
            g.drawString("" + rands[i], i * FONT_SIZE + 10, 25);
        }
    }

    /**
     * @description: 绘制验证码图片背景
     * @param: g
     * @return: void
     */
    private static void drawBackground(Graphics g) {

        g.setColor(Color.white);
        g.fillRect(0, 0, WIDTH, HEIGHT);

        // 绘制验证码干扰点
        for (int i = 0; i < 200; i++) {
            int x = (int) (Math.random() * WIDTH);
            int y = (int) (Math.random() * HEIGHT);
            g.setColor(getRandomColor());
            g.drawOval(x, y, 1, 1);

        }
    }


    /**
     * @description: 获取随机颜色
     * @param: no
     * @return: java.awt.Color
     */
    private static Color getRandomColor() {
        Random ran = new Random();
        return new Color(ran.nextInt(220), ran.nextInt(220), ran.nextInt(220));
    }
}

2.7.2、token口令生成工具 JwtHelper

package com.zyj.myzhxy.util;

/**
 * @Author zhang
 * @Date 2022/4/17 - 23:18
 * @Version 1.0
 */
import io.jsonwebtoken.*;
import org.springframework.util.StringUtils;

import java.util.Date;

public class JwtHelper {
    // 一天的毫秒数
    private static long tokenExpiration = 24*60*60*1000;
    // 后缀信息，用于增加保密性
    private static String tokenSignKey = "123456";

    //生成token字符串(根据tokenExpiration和tokenSignKey)
    public static String createToken(Long userId, Integer userType) {
        String token = Jwts.builder()

                .setSubject("YYGH-USER")

                .setExpiration(new Date(System.currentTimeMillis() + tokenExpiration))

                .claim("userId", userId)
//                .claim("userName", userName)
                .claim("userType", userType)

                .signWith(SignatureAlgorithm.HS512, tokenSignKey)
                .compressWith(CompressionCodecs.GZIP)
                .compact();
        return token;
    }

    //从token字符串获取userid
    public static Long getUserId(String token) {
        if(StringUtils.isEmpty(token)) return null;
        Jws<Claims> claimsJws = Jwts.parser().setSigningKey(tokenSignKey).parseClaimsJws(token);
        Claims claims = claimsJws.getBody();
        Integer userId = (Integer)claims.get("userId");
        return userId.longValue();
    }

    //从token字符串获取userType
    public static Integer getUserType(String token) {
        if(StringUtils.isEmpty(token)) return null;
        Jws<Claims> claimsJws
                = Jwts.parser().setSigningKey(tokenSignKey).parseClaimsJws(token);
        Claims claims = claimsJws.getBody();
        return (Integer)(claims.get("userType"));
    }

    //从token字符串获取userName
    public static String getUserName(String token) {
        if(StringUtils.isEmpty(token)) return "";
        Jws<Claims> claimsJws
                = Jwts.parser().setSigningKey(tokenSignKey).parseClaimsJws(token);
        Claims claims = claimsJws.getBody();
        return (String)claims.get("userName");
    }

    //判断token是否有效
    public static boolean isExpiration(String token){
        try {
            boolean isExpire = Jwts.parser()
                    .setSigningKey(tokenSignKey)
                    .parseClaimsJws(token)
                    .getBody()
                    .getExpiration().before(new Date());
            //没有过期，有效，返回false
            return isExpire;
        }catch(Exception e) {
            //过期出现异常，返回true
            return true;
        }
    }


    /**
     * 刷新Token
     * @param token
     * @return
     */
    public String refreshToken(String token) {
        String refreshedToken;
        try {
            final Claims claims = Jwts.parser()
                    .setSigningKey(tokenSignKey)
                    .parseClaimsJws(token)
                    .getBody();
            refreshedToken = JwtHelper.createToken(getUserId(token), getUserType(token));
        } catch (Exception e) {
            refreshedToken = null;
        }
        return refreshedToken;
    }

    public static void main(String[] args) {
//        String token = JwtHelper.createToken(1L, "lucy");
//        System.out.println(token);
//        System.out.println(JwtHelper.getUserId(token));
//        System.out.println(JwtHelper.getUserName(token));
    }
}

2.7.3、解析request请求中的 token口令的工具AuthContextHolder

import javax.servlet.http.HttpServletRequest;

public class AuthContextHolder {

    //从请求头token获取userid
    public static Long getUserIdToken(HttpServletRequest request) {
        //从请求头token
        String token = request.getHeader("token");
        //调用工具类
        Long userId = JwtHelper.getUserId(token);
        return userId;
    }

    //从请求头token获取name
    public static String getUserName(HttpServletRequest request) {
        //从header获取token
        String token = request.getHeader("token");
        //jwt从token获取username
        String userName = JwtHelper.getUserName(token);
        return userName;
    }
}

2.7.4、MD5加密工具类

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


public final class MD5 {

    /**
     * 将明文转为密文
     * @param strSrc 明文
     * @return 密文
     */
    public static String encrypt(String strSrc) {
        try {
            char hexChars[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8',
                    '9', 'a', 'b', 'c', 'd', 'e', 'f' };
            byte[] bytes = strSrc.getBytes();
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(bytes);
            bytes = md.digest();
            int j = bytes.length;
            char[] chars = new char[j * 2];
            int k = 0;
            for (int i = 0; i < bytes.length; i++) {
                byte b = bytes[i];
                chars[k++] = hexChars[b >>> 4 & 0xf];
                chars[k++] = hexChars[b & 0xf];
            }
            return new String(chars);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            throw new RuntimeException("MD5加密出错！！+" + e);
        }
    }
    
}

2.7.5、响应结果类型码枚举

import lombok.Getter;

/**
 * 统一返回结果状态信息类
 *
 */
@Getter
public enum ResultCodeEnum {

    SUCCESS(200,"成功"),
    FAIL(201, "失败"),
    SERVICE_ERROR(2012, "服务异常"),
    ILLEGAL_REQUEST( 204, "非法请求"),
    PAY_RUN(205, "支付中"),
    ARGUMENT_VALID_ERROR(206, "参数校验错误"),

    LOGIN_ERROR(207, "用户名或密码错误"),
    LOGIN_AUTH(208, "未登陆"),
    PERMISSION(209, "没有权限"),
    SECKILL_NO_START(210, "秒杀还没开始"),
    SECKILL_RUN(211, "正在排队中"),
    SECKILL_NO_PAY_ORDER(212, "您有未支付的订单"),
    SECKILL_FINISH(213, "已售罄"),
    SECKILL_END(214, "秒杀已结束"),
    SECKILL_SUCCESS(215, "抢单成功"),
    SECKILL_FAIL(216, "抢单失败"),
    SECKILL_ILLEGAL(217, "请求不合法"),
    SECKILL_ORDER_SUCCESS(218, "下单成功"),
    COUPON_GET(220, "优惠券已经领取"),
    COUPON_LIMIT_GET(221, "优惠券已发放完毕"),
    //2022-02-22
    LOGIN_CODE(222,"长时间未操作,会话已失效,请刷新页面后重试!"),
    CODE_ERROR(223,"验证码错误!"),
    TOKEN_ERROR(224,"Token无效!")
    ;

    private Integer code;

    private String message;

    private ResultCodeEnum(Integer code, String message) {
        this.code = code;
        this.message = message;
    }
}

2.7.6、JSON响应结果格式封装类

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

/**
 * 全局统一返回结果类
 *
 */
@Data
@ApiModel(value = "全局统一返回结果")
public class Result<T> {

    @ApiModelProperty(value = "返回码")
    private Integer code;

    @ApiModelProperty(value = "返回消息")
    private String message;

    @ApiModelProperty(value = "返回数据")
    private T data;

    public Result(){}

    // 返回数据
    protected static <T> Result<T> build(T data) {
        Result<T> result = new Result<T>();
        if (data != null)
            result.setData(data);
        return result;
    }

    public static <T> Result<T> build(T body, ResultCodeEnum resultCodeEnum) {
        Result<T> result = build(body);
        result.setCode(resultCodeEnum.getCode());
        result.setMessage(resultCodeEnum.getMessage());
        return result;
    }

    public static<T> Result<T> ok(){
        return Result.ok(null);
    }

    /**
     * 操作成功
     * @param data
     * @param <T>
     * @return
     */
    public static<T> Result<T> ok(T data){
        Result<T> result = build(data);
        return build(data, ResultCodeEnum.SUCCESS);
    }

    public static<T> Result<T> fail(){
        return Result.fail(null);
    }

    /**
     * 操作失败
     * @param data
     * @param <T>
     * @return
     */
    public static<T> Result<T> fail(T data){
        Result<T> result = build(data);
        return build(data, ResultCodeEnum.FAIL);
    }

    public Result<T> message(String msg){
        this.setMessage(msg);
        return this;
    }

    public Result<T> code(Integer code){
        this.setCode(code);
        return this;
    }

    public boolean isOk() {
        if(this.getCode().intValue() == ResultCodeEnum.SUCCESS.getCode().intValue()) {
            return true;
        }
        return false;
    }
}

2.7.7、文件上传工具类

import org.apache.commons.io.filefilter.SuffixFileFilter;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

/**
 * @project: zhxy
 * @description: 上传文件的工具类
 */
public class UploadFile {

    //存储文件上传失败的错误信息
    private static Map<String, Object> error_result = new HashMap<>();
    //存储头像的上传结果信息
    private static Map<String, Object> upload_result = new HashMap<>();

    /**
     * @description: 效验所上传图片的大小及格式等信息...
     * @param: photo
     * @param: path
     * @return: java.util.Map<java.lang.String, java.lang.Object>
     */
    private static Map<String, Object> uploadPhoto(MultipartFile photo, String path) {
        //限制头像大小(20M)
        int MAX_SIZE = 20971520;
        //获取图片的原始名称
        String orginalName = photo.getOriginalFilename();
        //如果保存文件的路径不存在,则创建该目录
        File filePath = new File(path);
        if (!filePath.exists()) {
            filePath.mkdirs();
        }
        //限制上传文件的大小
        if (photo.getSize() > MAX_SIZE) {
            error_result.put("success", false);
            error_result.put("msg", "上传的图片大小不能超过20M哟!");
            return error_result;
        }
        // 限制上传的文件类型
        String[] suffixs = new String[]{".png", ".PNG", ".jpg", ".JPG", ".jpeg", ".JPEG", ".gif", ".GIF", ".bmp", ".BMP"};
        SuffixFileFilter suffixFileFilter = new SuffixFileFilter(suffixs);
        if (!suffixFileFilter.accept(new File(path + orginalName))) {
            error_result.put("success", false);
            error_result.put("msg", "禁止上传此类型文件! 请上传图片哟!");
            return error_result;
        }

        return null;
    }

    /**
     * @description: (提取公共代码 : 提高代码的可重用性)获取头像的上传结果信息
     * @param: photo
     * @param: dirPaht
     * @param: portraitPath
     * @return: java.util.Map<java.lang.String, java.lang.Object>
     */
    public static Map<String, Object> getUploadResult(MultipartFile photo, String dirPaht, String portraitPath) {

        if (!photo.isEmpty() && photo.getSize() > 0) {
            //获取图片的原始名称
            String orginalName = photo.getOriginalFilename();
            //上传图片,error_result:存储头像上传失败的错误信息
            Map<String, Object> error_result = UploadFile.uploadPhoto(photo, dirPaht);
            if (error_result != null) {
                return error_result;
            }
            //使用UUID重命名图片名称(uuid__原始图片名称)
            String newPhotoName = UUID.randomUUID() + "__" + orginalName;
            //将上传的文件保存到目标目录下
            try {
                photo.transferTo(new File(dirPaht + newPhotoName));
                upload_result.put("success", true);
                upload_result.put("portrait_path", portraitPath + newPhotoName);//将存储头像的项目路径返回给页面
            } catch (IOException e) {
                e.printStackTrace();
                upload_result.put("success", false);
                upload_result.put("msg", "上传文件失败! 服务器端发生异常!");
                return upload_result;
            }

        } else {
            upload_result.put("success", false);
            upload_result.put("msg", "头像上传失败! 未找到指定图片!");
        }
        return upload_result;
    }
}

2.8、创建数据表及数据

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for tb_admin
-- ----------------------------
DROP TABLE IF EXISTS `tb_admin`;
CREATE TABLE `tb_admin`  (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `gender` CHAR(1) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `password` VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `telephone` VARCHAR(12) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `address` VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `portrait_path` VARCHAR(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = INNODB AUTO_INCREMENT = 157 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = DYNAMIC;

-- ----------------------------
-- Records of tb_admin
-- ----------------------------
INSERT INTO `tb_admin` VALUES (101, 'admin', '女', '21232f297a57a5a743894a0e4a801fc3', '[email protected]', '13260161111', '昌平', 'upload/default.jpg');
INSERT INTO `tb_admin` VALUES (102, 'admin1', '男', '21232f297a57a5a743894a0e4a801fc3', '[email protected]', '13260166090', '北京', 'upload/default.jpg');
INSERT INTO `tb_admin` VALUES (103, 'admin2', '男', '21232f297a57a5a743894a0e4a801fc3', '[email protected]', '13260166090', '北京', 'upload/default.jpg');
INSERT INTO `tb_admin` VALUES (104, 'admin3', '男', '21232f297a57a5a743894a0e4a801fc3', '[email protected]', '13666666666', '宏福苑', 'upload/default.jpg');

-- ----------------------------
-- Table structure for tb_clazz
-- ----------------------------
DROP TABLE IF EXISTS `tb_clazz`;
CREATE TABLE `tb_clazz`  (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `number` INT(3) NULL DEFAULT NULL,
  `introducation` VARCHAR(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `headmaster` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `telephone` VARCHAR(12) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `grade_name` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = INNODB AUTO_INCREMENT = 10 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = DYNAMIC;

-- ----------------------------
-- Records of tb_clazz
-- ----------------------------
INSERT INTO `tb_clazz` VALUES (1, '一年一班', 30, '大圣的一年一班好', '大圣', '[email protected]', '13260166090', '一年级');
INSERT INTO `tb_clazz` VALUES (2, '一年二班', 28, '小张的一年二班好', '小张', '[email protected]', '13260166090', '一年级');
INSERT INTO `tb_clazz` VALUES (3, '二年一班', 35, '小韩的二年一班好', '小韩', '[email protected]', '13260166090', '二年级');
INSERT INTO `tb_clazz` VALUES (4, '二年二班', 30, '小强的二年二班好', '小强', '[email protected]', '13260166090', '二年级');
INSERT INTO `tb_clazz` VALUES (5, '三年一班', 30, '小花的三年一班好', '小花', '[email protected]', '13260166090', '三年级');
INSERT INTO `tb_clazz` VALUES (6, '三年二班', 30, '小赵的三年二班好', '小赵', '[email protected]', '13260166090', '三年级');
INSERT INTO `tb_clazz` VALUES (7, '四年一班', 30, '小赵的三年二班好', '小飞', '[email protected]', '13260166090', '四年级');

-- ----------------------------
-- Table structure for tb_grade
-- ----------------------------
DROP TABLE IF EXISTS `tb_grade`;
CREATE TABLE `tb_grade`  (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '',
  `manager` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `telephone` VARCHAR(12) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `introducation` VARCHAR(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`, `name`) USING BTREE
) ENGINE = INNODB AUTO_INCREMENT = 12 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = DYNAMIC;

-- ----------------------------
-- Records of tb_grade
-- ----------------------------
INSERT INTO `tb_grade` VALUES (1, '一年级', '大圣', '[email protected]', '13260166090', '大学一年级');
INSERT INTO `tb_grade` VALUES (2, '二年级', '小魏', '[email protected]', '13260166090', '大学二年级');
INSERT INTO `tb_grade` VALUES (3, '三年级', '小李', '[email protected]', '13666666666', '三年级,这个班级的孩子们很有才艺');
INSERT INTO `tb_grade` VALUES (4, '五年级', '小丽', '[email protected]', '13666666666', '这个年级的同学多才多活力');
INSERT INTO `tb_grade` VALUES (5, '六年级', '小明', '[email protected]', '13666666666', '这个年级的主任是小明');

-- ----------------------------
-- Table structure for tb_student
-- ----------------------------
DROP TABLE IF EXISTS `tb_student`;
CREATE TABLE `tb_student`  (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `sno` VARCHAR(20) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `name` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `gender` CHAR(1) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `password` VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `telephone` VARCHAR(12) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `address` VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `introducation` VARCHAR(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `portrait_path` VARCHAR(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `clazz_name` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = INNODB AUTO_INCREMENT = 10 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = DYNAMIC;

-- ----------------------------
-- Records of tb_student
-- ----------------------------
INSERT INTO `tb_student` VALUES (1, '1001', '张小明', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京天通苑', '这个学生学习好', 'upload/default.jpg', '一年一班');
INSERT INTO `tb_student` VALUES (2, '1002', '郭建超', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京昌平', '这个学生会功夫', 'upload/default.jpg', '一年一班');
INSERT INTO `tb_student` VALUES (3, '1003', '史汶鑫', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京昌平', '这个学生酒量好', 'upload/default.jpg', '二年一班');
INSERT INTO `tb_student` VALUES (4, '1004', '高建军', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京昌平', '这个学生会做饭', 'upload/default.jpg', '二年一班');
INSERT INTO `tb_student` VALUES (5, '1005', '邹伟斌', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京昌平', '这个学生能吃辣', 'upload/default.jpg', '三年一班');
INSERT INTO `tb_student` VALUES (6, '1006', '刘路', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京昌平', '这个学生是学霸', 'upload/default.jpg', '三年二班');
INSERT INTO `tb_student` VALUES (7, '1007', '庞家仨', '女', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京昌平', '这个学生海拔高', 'upload/default.jpg', '三年二班');
INSERT INTO `tb_student` VALUES (8, '1008', '谭帅', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京昌平', '这个学生想考研', 'upload/default.jpg', '四年一班');

-- ----------------------------
-- Table structure for tb_teacher
-- ----------------------------
DROP TABLE IF EXISTS `tb_teacher`;
CREATE TABLE `tb_teacher`  (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `tno` VARCHAR(20) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `name` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `gender` CHAR(1) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `password` VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` VARCHAR(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `telephone` VARCHAR(12) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `address` VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `portrait_path` VARCHAR(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `clazz_name` VARCHAR(15) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = INNODB AUTO_INCREMENT = 9 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = DYNAMIC;

-- ----------------------------
-- Records of tb_teacher
-- ----------------------------
INSERT INTO `tb_teacher` VALUES (1, '101', '大圣', '女', '123456', '[email protected]', '13260166090', '北京昌平', 'upload/default.jpg', '一年一班');
INSERT INTO `tb_teacher` VALUES (2, '102', '小张', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京海淀', 'upload/default.jpg', '一年二班');
INSERT INTO `tb_teacher` VALUES (3, '103', '小韩', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京朝阳', 'upload/default.jpg', '二年一班');
INSERT INTO `tb_teacher` VALUES (4, '104', '小强', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京通州', 'upload/default.jpg', '二年二班');
INSERT INTO `tb_teacher` VALUES (5, '105', '小花', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京顺义', 'upload/default.jpg', '三年一班');
INSERT INTO `tb_teacher` VALUES (6, '106', '小赵', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京东城', 'upload/default.jpg', '三年二班');
INSERT INTO `tb_teacher` VALUES (7, '107', '小飞', '男', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13260166090', '北京西城', 'upload/default.jpg', '四年一班');
INSERT INTO `tb_teacher` VALUES (8, '108', '秀秀', '女', 'e10adc3949ba59abbe56e057f20f883e', '[email protected]', '13855555555', '海淀', 'upload/12fe07bf8b6d493b96294f1ef0552339default.jpg', '一年一班');

SET FOREIGN_KEY_CHECKS = 1;

2.9、根据数据表准备pojo、mapper、controller、service及其实现类

这里只写 admin，其他类似

@Data
@AllArgsConstructor
@NoArgsConstructor
@TableName("tb_admin")
public class Admin {
    @TableId(value = "id", type = IdType.AUTO)
    private Integer id;
    private String name;
    private Character gender;
    private String password;
    private String email;
    private String telephone;
    private String address;
    private String portraitPath;  // 头像图片路径
}

@Mapper
public interface AdminMapper extends BaseMapper<Admin> {
}

public interface AdminService extends IService<Admin> {
}

@Service("adminServiceImpl")
@Transactional
public class AdminServiceImpl extends ServiceImpl<AdminMapper, Admin> implements AdminService {
}

@RestController
@RequestMapping("/sms/adminController")
public class AdminController {
}

3、测试访问首页的问题：数据库版本不一致

完成以上搭建后，应该可以实现对首页的访问，但我这里失败了。后来发现是因为数据库版本的不一致的问题。

由于我的 MySQL 版本为 5.7，这里需要在 pom.xml 中更改导入的数据库驱动版本

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>

application.yaml 中数据库的配置也要与 5.7 版本的格式对应

    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/zhxy_db?characterEncoding=utf-8&useSSL=false   #&serverTimezone=GMT%2B8
    username: root
    password: zyj123