Springdata redis与jedis关系
注：本文转自https://www.jianshu.com/p/c7b4cd47ad65
对于刚接触Spring boot data-redis
的同学，与jedis的关系很容易搞混，这里对data-redis于jedis做一个简单的说明，并提供整合方式
1. 区别与关系
jedis
jedis是redis的java客户端，通过它可以对redis进行操作。与之功能相似的还包括：Lettuce等
spring-data-redis
它依赖jedis或Lettuce，实际上是对jedis这些客户端的封装，提供一套与客户端无关的api供应用使用，从而你在从一个redis客户端切换为另一个客户端，不需要修改业务代码。
2. spring boot 整合data redis （默认依赖Lettuce）
spring-boot-data-redis 内部实现了对Lettuce和jedis两个客户端的封装，默认使用的是Lettuce
pom.xml
<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>4.0.0modelVersion>
<groupId>com.heichonggroupId>
<artifactId>demoartifactId>
<version>0.0.1-SNAPSHOTversion>
<packaging>jarpackaging>
<name>demoname>
<description>Demo project for Spring Bootdescription>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.0.4.RELEASEversion>
<relativePath/>
parent>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-redisartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
application.yml
spring:
redis:
database: 0
host: 192.168.1.191
port: 6379
SimpleService redis测试类
package com.heichong.demo.redis;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
@Service
public class SimpleService {
static Logger logger = LoggerFactory.getLogger(SimpleService.class) ;
@Autowired
StringRedisTemplate stringRedisTemplate ;
public void run(){
logger.info("redis连接工厂：{}",stringRedisTemplate.getConnectionFactory());
//添加key
stringRedisTemplate.opsForValue().set("user","张三");
//获取key
logger.info("从redis中获取key=user的值为：{}",stringRedisTemplate.opsForValue().get("user"));
//删除key
stringRedisTemplate.delete("user");
}
}
DemoApplication 启动类
package com.heichong.demo;
import com.heichong.demo.redis.SimpleService;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
ApplicationContext ctx = SpringApplication.run(DemoApplication.class, args);
SimpleService simpleService = ctx.getBean(SimpleService.class) ;
simpleService.run();
}
}
运行日志如下
2018-08-09 09:24:14.726 INFO 7108 --- [ main] com.heichong.demo.redis.SimpleService : redis连接工厂：org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory@62417a16
2018-08-09 09:24:14.839 INFO 7108 --- [ main] io.lettuce.core.EpollProvider : Starting without optional epoll library
2018-08-09 09:24:14.840 INFO 7108 --- [ main] io.lettuce.core.KqueueProvider : Starting without optional kqueue library
2018-08-09 09:24:14.955 INFO 7108 --- [ main] com.heichong.demo.redis.SimpleService : 从redis中获取key=user的值为：张三
从输出的工厂类为LettuceConnectionFactory我们就可以看出，默认使用的Lettuce
3. spring boot 整合data redis （jedis）
只需要修改pom，业务代码都不需要修改
pom.xml
<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>4.0.0modelVersion>
<groupId>com.heichonggroupId>
<artifactId>demoartifactId>
<version>0.0.1-SNAPSHOTversion>
<packaging>jarpackaging>
<name>demoname>
<description>Demo project for Spring Bootdescription>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.0.4.RELEASEversion>
<relativePath/>
parent>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-redisartifactId>
<exclusions>
<exclusion>
<groupId>io.lettucegroupId>
<artifactId>lettuce-coreartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>redis.clientsgroupId>
<artifactId>jedisartifactId>
<version>2.9.0version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
再次运行日志如下
2018-08-09 09:34:29.500 INFO 7131 --- [ main] com.heichong.demo.redis.SimpleService : redis连接工厂：org.springframework.data.redis.connection.jedis.JedisConnectionFactory@60d1a32f
2018-08-09 09:34:29.553 INFO 7131 --- [ main] com.heichong.demo.redis.SimpleService : 从redis中获取key=user的值为：张三
从输出的工厂类为JedisConnectionFactory我们就可以看出，redis客户端已经变为jedis