springboot2.0整合redis案例
首先创建一个springboot项目。
添加pom配置：
org.springframework.boot
spring-boot-starter-data-redis
pom配置文件内容为：
4.0.0
com.pangjh
springboot-redis
0.0.1-SNAPSHOT
jar
springboot-redis
redis缓存
org.springframework.boot
spring-boot-starter-parent
2.0.0.RELEASE
UTF-8
UTF-8
1.8
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-starter-data-redis
org.springframework.boot
spring-boot-maven-plugin
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