springboot2.0整合redis案例

首先创建一个springboot项目。
添加pom配置： <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>pom配置文件内容为：<?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.pangjh</groupId>
<artifactId>springboot-redis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>springboot-redis</name>
<description>redis缓存</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.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-web</artifactId>
</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-redis</artifactId>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>
创建redis配置文件RedisConfig.java：



内容为：package com.pangjh.conf;

import java.util.concurrent.CountDownLatch;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.listener.PatternTopic;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.data.redis.listener.adapter.MessageListenerAdapter;

/**
* redis配置
* @author pangjianhui
*
*/
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {

@Bean
RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory,
MessageListenerAdapter listenerAdapter) {

RedisMessageListenerContainer container = new RedisMessageListenerContainer();
container.setConnectionFactory(connectionFactory);
container.addMessageListener(listenerAdapter, new PatternTopic("chat"));

return container;
}

@Bean
MessageListenerAdapter listenerAdapter(Receiver receiver) {
return new MessageListenerAdapter(receiver, "receiveMessage");
}

@Bean
Receiver receiver(CountDownLatch latch) {
return new Receiver(latch);
}

@Bean
CountDownLatch latch() {
return new CountDownLatch(1);
}

@Bean
StringRedisTemplate template(RedisConnectionFactory connectionFactory) {
return new StringRedisTemplate(connectionFactory);
}

public class Receiver {

private CountDownLatch latch;

@Autowired
public Receiver(CountDownLatch latch) {
this.latch = latch;
}

public void receiveMessage(String message) {
latch.countDown();
}
}

}
redis配置：# REDIS
# Redis数据库索引（默认为0）
spring.redis.database=0
# Redis服务器地址 （默认为127.0.0.1）
spring.redis.host=127.0.0.1
# Redis服务器连接端口 （默认为6379）
spring.redis.port=6379
# Redis服务器连接密码（默认为空）
spring.redis.password=
# 连接超时时间（毫秒）
spring.redis.timeout=2000以上操作基本完成了springboot2.0与redis的整合，下面我们测试使用：

通过代码方式使用redis
    编写controller：package com.pangjh.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class PangjhController {

@Autowired
private StringRedisTemplate template;

@RequestMapping("/setValue")
public String setValue(){
if(!template.hasKey("shabao")){
template.opsForValue().append("shabao", "我是傻宝");
return "使用redis缓存保存数据成功";
}else{
template.delete("shabao");
return "key已存在";
}
}

@RequestMapping("/getValue")
public String getValue(){

if(!template.hasKey("shabao")){
return "key不存在，请先保存数据";
}else{
String shabao = template.opsForValue().get("shabao");//根据key获取缓存中的val
return "获取到缓存中的数据：shabao="+shabao;
}
}

}
启动项目（注意这里启动项目需要确保redis服务的开启状态）
请求：http://localhost:8080/setValue



存储数据到redis成功！
请求：http://localhost:8080/getValue，查询数据
    


通过注解方式使用redis
    编写model:
package com.pangjh.model;

import java.io.Serializable;

public class User implements Serializable {

private static final long serialVersionUID = 1L;

private String id;

private String name;

private int age;

public User() {
super();
}

public User(String id, String name, int age) {
super();
this.id = id;
this.name = name;
this.age = age;
}

public String getId() {
return id;
}

public void setId(String id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

}
编写接口：package com.pangjh.service;

import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;

import com.pangjh.model.User;

public interface UserService {

@Cacheable(value="users", key="'user_'+#id")
User getUser(String id);

@CacheEvict(value="users", key="'user_'+#id",condition="#id!=1")
void deleteUser(String id);

}
编写接口实现类：package com.pangjh.serviceImpl;

import org.springframework.stereotype.Service;

import com.pangjh.model.User;
import com.pangjh.service.UserService;

@Service
public class UserServiceImpl implements UserService {

@Override
public User getUser(String id) {
System.out.println(id+"进入实现类获取数据！");
User user = new User();
user.setId(id);
user.setName("香菇");
user.setAge(18);
return user;
}

@Override
public void deleteUser(String id) {
System.out.println(id+"进入实现类删除数据！");
}

}
编写controller：package com.pangjh.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.pangjh.model.User;
import com.pangjh.service.UserService;

@RestController
public class UserController {

@Autowired
private UserService userService;

@RequestMapping("/getUser")
public User getUser(){
User user = userService.getUser("xianggu");
return user;
}

@RequestMapping("/deleteUser")
public String deleteUser(){
userService.deleteUser("xianggu");
return "执行了删除";
}

}
项目结构如下：



启动项目
请求：http://localhost:8080/getUser



在缓存的有效时间内，重复请求，后台只会打印一次：



代码：https://github.com/pangjianhui1991/xianggu.git