springboot系列 | 開啟快取(redis)
阿新 • • 發佈：2019-01-02
這篇基於redis在springboot中開啟快取處理
專案目錄結構
依賴包引入
<?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.cwh</groupId> <artifactId>springbootCache</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>springbootCache</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.10.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-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.0</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.29</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
配置檔案
spring.datasource.url=jdbc\:mysql\://127.0.0.1\:3306/springboots?useUnicode\=true&characterEncoding\=gbk&zeroDateTimeBehavior\=convertToNull spring.datasource.username=root spring.datasource.password= spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.type=com.alibaba.druid.pool.DruidDataSource # \u521D\u59CB\u5316\u5927\u5C0F\uFF0C\u6700\u5C0F\uFF0C\u6700\u5927 spring.datasource.initialSize=5 spring.datasource.minIdle=5 spring.datasource.maxActive=20 # \u914D\u7F6E\u83B7\u53D6\u8FDE\u63A5\u7B49\u5F85\u8D85\u65F6\u7684\u65F6\u95F4 spring.datasource.maxWait=60000 spring.datasource.show-sql=true mybatis.mapper-locations=classpath*:mapper/*Mapper.xml mybatis.type-aliases-package=com.cwh.springbootMybatis.entity spring.redis.host=localhost spring.redis.port=6379 spring.redis.password= spring.redis.database=1 spring.redis.pool.max-active=20 spring.redis.pool.max-wait=-1 spring.redis.pool.max-idle=500 spring.redis.pool.min-idle=5 spring.redis.timeout=0 logging.level.com.cwh.springbootCache=DEBUG
具體程式碼
UserMapper.xml：
UserMapper.java：<?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.cwh.springbootCache.mapper.UserMapper"> <select id="findUserInfo" resultType="com.cwh.springbootCache.entity.User" parameterType="java.lang.Integer"> select id,name from user where id=#{id} </select> <insert id="addUserInfo" parameterType="com.cwh.springbootCache.entity.User"> insert into user (id, name ) values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR} ) </insert> <insert id="updateUserInfo" parameterType="com.cwh.springbootCache.entity.User"> update user set name=#{name} where id=#{id} </insert> <delete id="delUserInfo" parameterType="java.lang.Integer"> delete from user where id = #{id,jdbcType=INTEGER} </delete> </mapper>
package com.cwh.springbootCache.mapper;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import com.cwh.springbootCache.entity.User;
@CacheConfig(cacheNames = "user")//快取名
@Mapper
public interface UserMapper {
/**
* #p0代表第一個引數，也就是id,
* 先從redis的user快取物件裡去查詢key等於傳過來的id的值。如果沒有，就去查表
* @param id
* @return
*/
@Cacheable(key = "#p0")
public List<User> findUserInfo(int id);
/**
* 代表往快取裡新增值，key為引數user的id屬性，
* 這樣當我們add一個User物件時，redis就會新增一個以id為key的User物件
* @param user
* @return
*/
@CachePut(key = "#p0.id")
public int addUserInfo(User user);
/**
* 代表往快取裡修改值，key為引數user的id屬性，
* 這樣當我們update一個User物件時，redis就會修改一個以id為key的User物件，
* 如果id為key的User物件沒有，redis則新增一個以id為key的User物件
* @param user
* @return
*/
@CachePut(key = "#p0.id")
public int updateUserInfo(User user);
/**
* 刪除快取
* @param id
* @return
*/
@CacheEvict(key = "#p0")
public int delUserInfo(int id);
}
UserService.java:
package com.cwh.springbootCache.service;
import java.util.List;
import com.cwh.springbootCache.entity.User;
public interface UserService {
public List<User> getUserInfo(int id);
public void insert(User user);
public void update(User user);
public void delete(int id);
}
package com.cwh.springbootCache.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.cwh.springbootCache.entity.User;
import com.cwh.springbootCache.mapper.UserMapper;
import com.cwh.springbootCache.service.UserService;
@Service
public class UserServiceImpl implements UserService{
@Autowired
private UserMapper userMapper;
public void insert(User user) {
userMapper.addUserInfo(user);
}
@Override
public List<User> getUserInfo(int id) {
return userMapper.findUserInfo(id);
}
@Override
public void update(User user) {
userMapper.updateUserInfo(user);
}
@Override
public void delete(int id) {
userMapper.delUserInfo(id);
}
}
package com.cwh.springbootCache.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.cwh.springbootCache.entity.User;
import com.cwh.springbootCache.service.UserService;
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/getUserInfo/{id}")
public List<User> getUserInfo(@PathVariable("id")String id) {
List<User> user = userService.getUserInfo(Integer.valueOf(id));
System.out.println(user.toString());
return user;
}
@RequestMapping("/addUserInfo")
public String addUserInfo() {
User user = new User();
user.setId(4L);
user.setName("cwh");
userService.insert(user);
return "success:"+user.toString();
}
@RequestMapping("/updateUserInfo")
public String updateUserInfo() {
User user = new User();
user.setId(4L);
user.setName("menco1");
userService.update(user);
return "success:"+user.toString();
}
@RequestMapping("/deleteUserInfo")
public String deleteUserInfo() {
userService.delete(4);
return "success";
}
}
Application.java:
package com.cwh.springbootCache;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
@SpringBootApplication
@EnableCaching //開啟快取
public class Application{
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}