SpringBoot整合实战

一、SpringBoot整合Redis

1、在pom.xml中导入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
    <version>2.3.7.RELEASE</version>
</dependency>

2、在application.properties中编写相关配置

spring.redis.host=127.0.0.1
spring.redis.port=6379

3、在测试类中进行测试

package com.kuang;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.kuang.pojo.User;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;

@SpringBootTest
class Springboot09RedisApplicationTests {

    @Autowired
    @Qualifier("redisTemplates")
    private RedisTemplate redisTemplate;

    @Test
    void contextLoads() {
        /*//获取redis的连接对象
        RedisConnection connection = redisTemplate.getConnectionFactory().getConnection();
        connection.flushDb();
        connection.flushAll();*/
        redisTemplate.opsForValue().set("mykey","kuangshen");
        System.out.println(redisTemplate.opsForValue().get("mykey"));
    }

    @Test
    public void test() throws JsonProcessingException {
        //真实的开发一般都使用json来传递对象
        User user = new User("狂神说", 3);
        String jsonUser = new ObjectMapper().writeValueAsString(user);
        redisTemplate.opsForValue().set("user",jsonUser);
        System.out.println(redisTemplate.opsForValue().get("user"));
    }

}

二、SpringBoot整合Swagger2

前后端分离开发，后端需要编写接口说明文档，会耗时比较多的时间。

swagger是一个用于生成服务器接口的规范性文档、并且能够对接口进行测试的工具。

1、作用

• 生成接口文档
• 可以对接口进行测试

2、整合

SpringBoot 2.3.7.RELEASE

2.1、在pom.xml中添加依赖

<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.9.2</version>
</dependency>
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.9.2</version>
</dependency>
<dependency>
    <groupId>com.github.xiaoymin</groupId>
    <artifactId>swagger-bootstrap-ui</artifactId>
    <version>1.9.6</version>
</dependency>

2.2、创建Swagger的配置（Java配置方式）

package com.zyb.xmmall.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;

@Configuration
public class Swagger2Config {

    /*封装接口文档信息*/
        @Bean
        public Docket getDocket(){
            return new Docket(DocumentationType.SWAGGER_2).apiInfo(apiInfo()).select()
                    .apis(RequestHandlerSelectors.basePackage("com.zyb.xmmall.controller"))
                    .paths(PathSelectors.any())
                    .build();
        }

        private ApiInfo apiInfo(){
            return new ApiInfoBuilder().title("《小米商城后端接口说明》")
                    .description("详细描述了后端提供给前端的接口的说明")
                    .contact(new Contact("管理员","",""))
                    .version("v 1.0.0")
                    .build();
        }
    }

2.3、编写测试的Controller类

@Api(tags="测试接口模板")
@Controller
@RequestMapping("api/v1")
public class TestController {
	
	@ApiOperation("test测试")
	@RequestMapping(value="/ha",method=RequestMethod.GET)
    @ResponseBody
	public String test(){
		return "test测试成功";
	}
	
	@ApiOperation("Area删除")
	@RequestMapping(value="/a",method=RequestMethod.POST)
    @ResponseBody
	public String ha(){
		return "Area删除成功";
	}
	
}

2.4、SpringBoot启动类

package com.zyb.xmmall;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@SpringBootApplication
@EnableSwagger2
public class XmmallApplication {

    public static void main(String[] args) {
        SpringApplication.run(XmmallApplication.class, args);
    }

}

2.5、项目运行截图

http://localhost:8080/swagger-ui.html

http://localhost:8080/doc.html

三、SpringBoot整合EasyExcel

1、在pom.xml中导入依赖

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.2.0</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.0</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>easyexcel</artifactId>
        <version>3.0.5</version>
    </dependency>
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.11.0</version>
    </dependency>
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.4</version>
    </dependency>
</dependencies>

2、在application.properties中编写相关配置

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/testexcel?characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456
mybatis.type-aliases-package=com.example.pojo
mybatis.mapper-locations=classpath:mapper/*.xml
logging.level.com.example.dao=debug

3、编写实体类

package com.example.pojo;

import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Data;

@Data
public class Student {

    @ExcelProperty(value = "编号",index = 0)
    private Integer id;

    @ExcelProperty(value = "姓名",index = 1)
    private String name;

    @ExcelProperty(value = "性别",index = 2)
    private String sex;

    @ExcelProperty(value = "年龄",index = 3)
    private Integer age;

}

4、编写dao层

package com.example.dao;

import com.example.pojo.Student;
import org.springframework.stereotype.Repository;
import java.util.List;

@Repository
public interface StudentDao {

    //查询全部学生信息
    List<Student> selectAll();

    //批量插入学生数据
    int saveStudent(List<Student> studentList);

}

5、在resources下mapper文件中编写StudentMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.dao.StudentDao">

    <resultMap id="stuMap" type="com.example.pojo.Student">
        <id column="id" property="id"/>
        <result column="name" property="name"/>
        <result column="sex" property="sex"/>
        <result column="age" property="age"/>
    </resultMap>

    <select id="selectAll" resultMap="stuMap">
        select * from student
    </select>

    <insert id="saveStudent" parameterType="list">
        insert into student(name,sex,age)
        <foreach collection="studentList" item="item"  separator="," index="index">
            (#{name},#{sex},#{age})
        </foreach>
    </insert>

</mapper>

6、编写service层

package com.example.service;

import com.example.pojo.Student;
import java.util.List;

public interface StudentService {
    //查询全部学生信息
    List<Student> selectAll();

    //批量插入学生数据
    int saveStudent(List<Student> studentList);
}

package com.example.service.impl;

import com.example.dao.StudentDao;
import com.example.pojo.Student;
import com.example.service.StudentService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

/**
 * 类名：
 * 创建时间：2021/12/16-15:15
 * 功能：
 */
@Service
public class StudentServiceImpl implements StudentService {

    @Resource
    private StudentDao studentDao;

    @Override
    public List<Student> selectAll() {
        return studentDao.selectAll();
    }

    @Override
    public int saveStudent(List<Student> studentList) {
        return studentDao.saveStudent(studentList);
    }
}

7、编写controller层

package com.example.controller;

import com.alibaba.excel.EasyExcel;
import com.example.pojo.Student;
import com.example.service.StudentService;
import com.example.utils.ExcelListener;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import javax.annotation.Resource;
import java.io.File;
import java.util.List;

@RestController
@RequestMapping("/easyexcel")
public class EasyExcelController {

    @Resource
    private StudentService service;

    @RequestMapping("/selectList")
    public List<Student> selectAll(){
        return service.selectAll();
    }

    @PostMapping("/import")
    public void impostExcel(String filename){
        EasyExcel.read(filename, Student.class,new ExcelListener()).sheet().doRead();
    }

    @PostMapping("/download")
    public void downloadExcel(MultipartFile file){
        EasyExcel.write((File) file,Student.class).sheet("").doWrite(service.selectAll());
    }

}

8、编写数据监听

package com.example.utils;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.example.pojo.Student;

import java.util.Map;

/**
 * 类名：数据监听
 */
public class ExcelListener extends AnalysisEventListener<Student> {
    //一行一行读取
    @Override
    public void invoke(Student data, AnalysisContext context) {
        System.out.println("====开始读取一行数据====");
        System.out.println("**" + data);
        System.out.println();
    }

    //读取表头内容
    @Override
    public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
        System.out.println("表头：" + headMap);
    }

    //读取完成之后
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
        System.out.println("====数据读取完毕====");
    }


}