增删改查

第一步 依赖

在项目pom.xml文件添加依赖

<?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> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.nmgdz</groupId> <artifactId>bigdata</artifactId> <version>0.0.1-SNAPSHOT</version> <name>bigdata</name> <description>init project</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!-- druid数据库连接池--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency> <!--lombok依赖--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <!--redis依赖配置--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <!--Swagger-UI API文档生产工具--> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.7.0</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.7.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>

第二步 application.yml中添加配置

在resource文件夹下的application.yml中添加配置

spring: datasource: type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/test?useSSL=false&useUnicode=true&characterEncoding=utf-8&autoReconnect=true&serverTimezone=Asia/Shanghai username: root password: 123456 initialSize: 20 minIdle: 50 maxActive: 500 jpa: hibernate: ddl-auto: update show-sql: true redis: host: localhost # Redis服务器地址 database: 0 # Redis数据库索引（默认为0） port: 6379 # Redis服务器连接端口 password: 123456 # Redis服务器连接密码（默认为空） jedis: pool: max-active: 8 # 连接池最大连接数（使用负值表示没有限制） max-wait: -1ms # 连接池最大阻塞等待时间（使用负值表示没有限制） max-idle: 8 # 连接池中的最大空闲连接 min-idle: 0 # 连接池中的最小空闲连接 timeout: 3000ms # 连接超时时间（毫秒）

第三步 增删改查的配置

package com.nmgdz.bigdata.controller; import com.nmgdz.bigdata.entity.User; import com.nmgdz.bigdata.service.RedisService; import com.nmgdz.bigdata.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; /** * @auther: gxq * @Date: 2020/9/1/11:15 */ @RestController @RequestMapping("user") public class UserController { @Autowired private UserService userService; @Autowired private RedisService redisService; /** * 查询 * * @param id * @return */ @GetMapping("/queryById") public String queryById(int id) { //从redis获取key为Id User String userStr = redisService.get(id + ""); //判断是否存在 if (userStr != null) { //查询 设置到redis redisService.set(id + "", userService.queryById(id).toString()); } return userStr; } /** * 增 改 * @param user * @return */ @PostMapping("/saveOrUpdate") public User saveOrUpdateUser(User user) { return userService.save(user); } /** * 删除用户 * @param id * @return */ @DeleteMapping("/delete") public Boolean deleteUser(int id) { userService.deletUserById(id); return true; } }

第四步 效果图