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SpringBoot之Redis（六）——Redis缓存实现
1. 添加maven依赖
pom.xml文件内容如下：
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.springboot</groupId>
<artifactId>cache</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>cache</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<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>1.3.2</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>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2. 参数配置
application.yml文件内容如下：
spring:
datasource:
url: jdbc:mysql://localhost:3306/redisCache?characterEncoding=UTF-8&serverTimezone=GMT
username: root
password: 123456
driver-class-name: com.mysql.cj.jdbc.Driver
#默认隔离级别为读写提交
tomcat:
default-transaction-isolation: 2
redis:
database: 0
host: 127.0.0.1
port: 6379
password:
jedis:
pool:
max-active: 8
max-wait: -1ms
max-idle: 8
min-idle: 0
timeout: 2000ms
#redis缓存配置
cache:
type: redis
cache-names: redisCache
redis:
#禁止前缀
use-key-prefix: false
#自定义前缀
key-prefix:
#允许保存空值
cache-null-values: true
#定义超时时间，单位毫秒
time-to-live: 600000
logging:
config: classpath:logback-spring.xml
path: D:/springbootLog/springboot
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.springboot.cache.model
3. 实体类
User.java
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.io.Serializable;
/**
* Created by HuangJun
* 10:15 2018/11/26
*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User implements Serializable{
private static final long serialVersionUID = 7760614561073458247L ;
private Integer id;
private String username;
private String birthday;
private String sex;
private String address;
}
4. Dao
UserDao.java
import com.springboot.cache.model.User;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* Created by HuangJun
* 10:22 2018/11/26
*/
@Repository
public interface UserDao {
//获取单个用户
User getUser(Integer id);
//保存用户
Integer insertUser(User user);
//修改用户
Integer updateUser(User user);
//查询用户，指定MyBatis 的参数名称
List<User> findUsers(User user);
//删除用户
int deleteUser(Integer id);
}
UserMapper.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.springboot.cache.dao.UserDao">
<sql id="BASE_COLUMN">
id,username,birthday,sex,address
</sql>
<select id="getUser" resultType="com.springboot.cache.model.User" >
select
<include refid="BASE_COLUMN"/>
from user
where id = #{id}
</select>
<insert id="insertUser" useGeneratedKeys="true" keyProperty="id"
parameterType="com.springboot.cache.model.User">
insert into user(username,birthday,sex,address)
VALUES (#{username}, #{birthday}, #{sex}, #{address})
</insert>
<update id="updateUser">
UPDATE USER
<set>
<if test="username!= null">
username = #{username},
</if>
<if test="birthday!= null">
birthday = #{birthday},
</if>
<if test="sex!= null">
sex = #{sex},
</if>
<if test="address!= null">
address = #{address},
</if>
</set>
WHERE id = #{id}
</update>
<select id="findUsers" resultType="com.springboot.cache.model.User">
<include refid="BASE_COLUMN"/>
from user
<where>
<if test="username!= null">
and username = #{username}
</if>
<if test="birthday!= null">
and birthday = #{birthday}
</if>
<if test="sex!= null">
and sex = #{sex}
</if>
<if test="address!= null">
and address = #{address}
</if>
</where>
</select>
<delete id= "deleteUser">
delete from user where id = #{id}
</delete>
</mapper>
5. Service
UserService.java
import com.springboot.cache.model.User;
import java.util.List;
/**
* Created by HuangJun
* 10:46 2018/11/26
*/
public interface UserService {
//获取单个用户
User getUser(Integer id);
//保存用户
User insertUser(User user);
//修改用户
User updateUser(User user);
//查询用户，指定MyBatis 的参数名称
List<User> findUsers(User user);
//删除用户
int deleteUser(Integer id);
}
UserServiceImpl.java
import com.springboot.cache.dao.UserDao;
import com.springboot.cache.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import javax.transaction.Transactional;
import java.util.List;
/**
* Created by HuangJun
* 10:52 2018/11/26
*/
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
@Transactional
@Cacheable(value = "redisCache", key = "'redis_user_' + #id")
public User getUser(Integer id) {
return userDao.getUser(id);
}
@Override
@Transactional
@CachePut(value = "redisCache", key = "'redis_user_' + #result.id")
public User insertUser(User user) {
userDao.insertUser(user);
return user;
}
@Override
@Transactional
@CachePut(value = "redisCache", key = "'redis_user_' + #result.id")
public User updateUser(User user) {
userDao.updateUser(user);
return user;
}
@Override
public List<User> findUsers(User user) {
return userDao.findUsers(user);
}
@Override
@Transactional
@CacheEvict(value = "redisCache", key = "'redis_user_' + #id", beforeInvocation = false)
public int deleteUser(Integer id) {
return userDao.deleteUser(id);
}
}
6. Controller
UserController.java
import com.springboot.cache.model.User;
import com.springboot.cache.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Created by HuangJun
* 11:07 2018/11/26
*/
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@PostMapping("createUser")
public User createUser(User user){
userService.insertUser(user);
return user;
}
@PutMapping("updateUser")
public User updateUser(User user){
userService.updateUser(user);
return user;
}
@GetMapping("findUsers")
public List<User> findUsers(User user){
return userService.findUsers(user);
}
@RequestMapping("getUser")
public Map<String,Object> getUser(Integer id){
Map<String,Object> map = new HashMap<String,Object>();
User user = userService.getUser(id);
map.put("success",true);
map.put("user",user);
return map;
}
@RequestMapping("deleteUser")
public Map<String,Object> deleteUser(Integer id){
int ret = userService.deleteUser(id);
Map<String,Object> map = new HashMap<String,Object>();
if(ret==1){
map.put("success",true);
map.put("message","删除成功");
}else{
map.put("success",false);
map.put("message","删除失败");
}
return map;
}
}
7. 源码下载
源码下载地址：https://download.csdn.net/download/huangjun0210/10808220