[TOC]
# 目录
## 前言
> 比较突出的是 Lettuce 和 jedis。Lettuce 和 jedis 的都是连接 Redis Server的客户端,Jedis 在实现上是直连 redis server,多线程环境下非线程安全,除非使用连接池,为每个 redis实例增加 物理连接。<br/>
Lettuce 是 一种可伸缩,线程安全,完全非阻塞的Redis客户端,多个线程可以共享一个RedisConnection,它利用Netty NIO 框架来高效地管理多个连接,从而提供了异步和同步数据访问方式,用于构建非阻塞的反应性应用程序。
<font color="red"> **springboot 1.5.x版本的默认的Redis客户端是 Jedis实现
springboot 2.x版本中默认客户端是用 lettuce实现**</font>
### 依赖
```xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
</dependency>
```
### application.yml
```yml
spring:
redis:
database: 0 # 实例库
host: localhost # redis地址
port: 6369 # redis端口
password: eddie_pass # redis如若没有密码,缺省
timeout: 5000 # 超时时间
lettuce:
pool:
max-active: 8
max-wait: -1
max-idle: 8
min-idle: 0
```
### 配置类
```java
package com.test.common.config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
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.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
/**
* @author eddie.lee
* @className RedisConfigurer
* @description
* @date created in 2020-11-09 15:14
* @modified by
*/
@Configuration
@AutoConfigureAfter(RedisAutoConfiguration.class)
public class RedisConfigurer {
@Bean
RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
ObjectMapper mapper = new ObjectMapper();
mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
/**
* 使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值(默认使用JDK的序列化方式)
*/
Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<>(Object.class);
serializer.setObjectMapper(mapper);
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(redisConnectionFactory);
template.setValueSerializer(serializer);
template.setKeySerializer(new StringRedisSerializer());
template.setHashKeySerializer(new StringRedisSerializer());
template.setHashValueSerializer(serializer);
template.afterPropertiesSet();
return template;
}
}
```
SpringBoot2.x+ Redis支持lettuce