8、Redis-Jedis、Lettuce和一个Demo

一、Jedis

二、Lettuce

三、一个Demo

Java集成Redis主要有3个方案：Jedis、Lettuce和Redisson。

其中，Jedis、Lettuce侧重于单例Redis，而Redisson侧重于分布式服务。

项目资源在文末

一、Jedis

1、创建SpringBoot项目

2、引入依赖

其中，jedis是所需要的依赖，lombok是为了方便后续配置

        <dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency>

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3、配置yml

#redis配置--jedis版
jedis:pool:#redis服务器的IPhost: localhost#redis服务器的Portport: 6379#数据库密码password:#连接超时时间timeout: 7200#最大活动对象数maxTotall: 100#最大能够保持idel状态的对象数maxIdle: 100#最小能够保持idel状态的对象数minIdle: 50#当池内没有返回对象时，最大等待时间maxWaitMillis: 10000#当调用borrow Object方法时，是否进行有效性检查testOnBorrow: true#当调用return Object方法时，是否进行有效性检查testOnReturn: true#“空闲链接”检测线程，检测的周期，毫秒数。如果为负值，表示不运行“检测线程”。默认为-1.timeBetweenEvictionRunsMillis: 30000#向调用者输出“链接”对象时，是否检测它的空闲超时；testWhileIdle: true# 对于“空闲链接”检测线程而言，每次检测的链接资源的个数。默认为3.numTestsPerEvictionRun: 50

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4、导入配置文件和加载配置类

导入配置文件：JedisProperties，导入yml文件内容

加载配置类：JedisConfig，加载JedisProperties内容

①JedisProperties

package com.example.redis_java.config;import lombok.Getter;
import lombok.Setter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;@Component
@ConfigurationProperties(prefix = "jedis.pool")
@Getter
@Setter
public class JedisProperties {private int maxTotall;private int maxIdle;private int minIdle;private int maxWaitMillis;private boolean testOnBorrow;private boolean testOnReturn;private int timeBetweenEvictionRunsMillis;private boolean testWhileIdle;private int numTestsPerEvictionRun;private String host;private String password;private int port;private int timeout;
}

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②JedisConfig

说明：如果SpringBoot是2.x版本，JedisConfig请使用注释掉的两行代码而不是它们对应的上面的代码

package com.example.redis_java.config;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.StringUtils;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;import java.time.Duration;@Configuration
public class JedisConfig {/*** jedis连接池** @param jedisProperties* @return*/@Beanpublic JedisPool jedisPool(JedisProperties jedisProperties) {JedisPoolConfig config = new JedisPoolConfig();config.setMaxTotal(jedisProperties.getMaxTotall());config.setMaxIdle(jedisProperties.getMaxIdle());config.setMinIdle(jedisProperties.getMinIdle());config.setMaxWait(Duration.ofMillis(jedisProperties.getMaxWaitMillis()));// config.setMaxWaitMillis(jedisProperties.getMaxWaitMillis());config.setTestOnBorrow(jedisProperties.isTestOnBorrow());config.setTestOnReturn(jedisProperties.isTestOnReturn());config.setTimeBetweenEvictionRuns(Duration.ofMillis(jedisProperties.getTimeBetweenEvictionRunsMillis()));// config.setTimeBetweenEvictionRunsMillis(jedisProperties.getTimeBetweenEvictionRunsMillis());config.setTestWhileIdle(jedisProperties.isTestWhileIdle());config.setNumTestsPerEvictionRun(jedisProperties.getNumTestsPerEvictionRun());if (StringUtils.hasText(jedisProperties.getPassword())) {return new JedisPool(config, jedisProperties.getHost(), jedisProperties.getPort(), jedisProperties.getTimeout(), jedisProperties.getPassword());}return new JedisPool(config, jedisProperties.getHost(), jedisProperties.getPort(), jedisProperties.getTimeout());}
}

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③项目结构

5、测试

①测试前

②测试类

package com.example.redis_java;import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;@SpringBootTest
public class JedisTest {@Autowiredprivate JedisPool jedisPool;@Testpublic void testConnection() {System.out.println(jedisPool);Jedis jedis = jedisPool.getResource();jedis.set("name", "Trxcx");System.out.println(jedis.get("name"));jedis.sadd("mySet", "a", "b", "d");System.out.println(jedis.smembers("mySet"));// jedis的方法名就是redis的命令jedis.close();}
}

③项目结构

④运行测试类

⑤测试后

说明：jedis的方法名就是redis的命令。如sadd、smembers。

二、Lettuce

Lettuce配置比较简单，这里直接在上一个项目的基础上进行配置，新项目配置Lettuce方法一致。

1、引入依赖

        <!--Lettuce依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency>

2、配置yml

如果有密码，设置对应的密码。

spring:redis:host: 127.0.0.1port: 6379# password: admin

3、测试

①编写测试类

package com.example.redis_java;import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.StringRedisTemplate;@SpringBootTest
public class LettureTest {@Autowiredprivate StringRedisTemplate template;// 约定：// 操作redis的key是字符串// value是字符串类型或字符串类型元素@Testpublic void testRedis() {template.opsForValue().set("name", "Trxcx");System.out.println(template.opsForValue().get("name"));template.opsForSet().add("Games","RDR2","CS2","ACOd");System.out.println(template.opsForSet().members("Games"));// 操作string// template.opsForValue().xx();// 操作hash// template.opsForHash().xx();// 操作list// template.opsForList().xx();// 操作set// template.opsForSet().xx();// 操作zset// template.opsForZSet().xx();// spring-data-redis方法是redis命令全称// template.opsForList().rightPush()  //rpush// 全局命令在template类上// template.keys("*");}
}

②项目结构