redis

需要导入的jar

<dependency>
<groupId>redis.clients</groupI>
<artifactId>jedis</artifactId>
<version>2.6.0</version>
</dependency>

一些配置，交给spring来管理
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http
4000
://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 构建连接池配置信息 -->
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<!-- 设置最大连接数 -->
<property name="maxTotal" value="${redis.maxTotal}" />
</bean>

<!-- 定义集群连接池 -->
<bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool">
<constructor-arg index="0" ref="jedisPoolConfig" />
<constructor-arg index="1">
<array>
<!-- 配置分片式集群信息 -->
<bean class="redis.clients.jedis.JedisShardInfo">
<!-- 访问ip,type属性设置参数类型 -->
<constructor-arg index="0" value="${redis.host1}" />
<!-- 端口号 -->
<constructor-arg index="1" value="${redis.port1}" />
</bean>
<!-- <bean class="redis.clients.jedis.JedisShardInfo"> -->
<!-- <constructor-arg index="0" value="${redis.host2}"/> -->
<!-- <constructor-arg index="1" value="${redis.port2}"/> -->
<!-- </bean> -->
</array>
</constructor-arg>
</bean>
</beans>


redis.properties
redis.maxTotal=50

#分片式集群信息
redis.host1=127.0.0.1
redis.port1=6379

#redis.host2=127.0.0.1
#redis.port2=6380

编写业务逻辑RedisService
package com.mulancang.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import redis.clients.jedis.ShardedJedis;
import redis.clients.jedis.ShardedJedisPool;

import com.mulancang.service.Function;
import com.mulancang.service.RedisService;

@Service
public class RedisServiceImpl implements RedisService{

@Autowired(required = false)
private ShardedJedisPool shardedJedisPool;

public String set(final String key, final String value) {
return execute(new Function<String, ShardedJedis>() {

public String callback(ShardedJedis shardedJedis) {
// 具体的业务逻辑
return shardedJedis.set(key, value);
}
});
}

public String get(final String key) {
return execute(new Function<String, ShardedJedis>() {

public String callback(ShardedJedis shardedJedis) {
// 具体的业务逻辑
return shardedJedis.get(key);
}
});
}

public Long delete(final String key) {
return execute(new Function<Long, ShardedJedis>() {

public Long callback(ShardedJedis shardedJedis) {
// 具体的业务逻辑
return shardedJedis.del(key);
}
});
}

public Long expire(final String key, final Integer seconds) {
return execute(new Function<Long, ShardedJedis>() {

public Long callback(ShardedJedis shardedJedis) {
// 具体的业务逻辑
// 设置存活时间
return shardedJedis.expire(key, seconds);
}
});
}

public Long set(final String key, final String value, final Integer seconds) {
return execute(new Function<Long, ShardedJedis>() {

public Long callback(ShardedJedis shardedJedis) {
// 具体的业务逻辑
// 保存数据
shardedJedis.set(key, value);
// 设置存活时间
return shardedJedis.expire(key, seconds);
}
});
}

private <T> T execute(Function<T, ShardedJedis> fun) {
// return fun.exe();
ShardedJedis shardedJedis = null;
try {
// 从集群连接池中获取到jedis分片对象
shardedJedis = shardedJedisPool.getResource();

// 具体的业务逻辑
return fun.callback(shardedJedis);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (null != shardedJedis) {
// 关闭，检测连接是否有效，有效则放回到连接池中，无效则重置状态
shardedJedis.close();
}
}
return null;
}
}


Function
package com.mulancang.service;

public interface Function<T, E> {
public T callback(E e);

}