今天试了一下Jedis里连接池JedisPool的的使用。代码如下：

package com.myapp.jedis.pooldemo;import redis.clients.jedis.Jedis;import redis.clients.jedis.JedisPool;import redis.clients.jedis.JedisPoolConfig;/** * Created by baidu on 16/10/18. */public class TestPool {    private static JedisPool pool = null;    public static JedisPool getPool() {        if (pool == null) {            JedisPoolConfig config = new JedisPoolConfig();            config.setMaxTotal(500);            config.setMaxIdle(5);            config.setMaxWaitMillis(1000*10);            //在borrow一个jedis实例时，是否提前进行validate操作；如果为true，则得到的jedis实例均是可用的；            config.setTestOnBorrow(true);            //new JedisPool(config, ADDR, PORT, TIMEOUT, AUTH);            pool = new JedisPool(config, "[ip]", 8379, 10000, "[auth]");        }        return pool;    }    public synchronized static Jedis getResource() {        if (pool == null) {            pool = getPool();        }        return pool.getResource();    }    // 返还到连接池    // Deprecated    // 换成用完之后, redis.close()    /*    public static void returnResource(Jedis redis) {        if (redis != null) {            pool.returnResource(redis);        }    }    */    public static void main(String[] args) {        Jedis redis = null;        int loop = 1;        while (loop < 20) {            try {                long start = System.currentTimeMillis();                redis = getResource();                redis.set("k1", "v1");                String ret = redis.get("k1");                long end = System.currentTimeMillis();                System.out.printf("Get ret from redis: %s with %d millis\n", ret, end-start);            } finally {                if (redis != null) {                    redis.close();                }            }            loop++;        }    }}

其中，有个函数returnResource已经deprecated了，现在Jedis的close方法重写了，用Jedis.close来释放资源。

跑了20次，运行结果如下：

Get ret from redis: v1 with 564 millisGet ret from redis: v1 with 235 millisGet ret from redis: v1 with 225 millisGet ret from redis: v1 with 214 millisGet ret from redis: v1 with 210 millisGet ret from redis: v1 with 232 millisGet ret from redis: v1 with 209 millisGet ret from redis: v1 with 211 millisGet ret from redis: v1 with 239 millisGet ret from redis: v1 with 207 millisGet ret from redis: v1 with 215 millisGet ret from redis: v1 with 223 millisGet ret from redis: v1 with 291 millisGet ret from redis: v1 with 220 millisGet ret from redis: v1 with 214 millisGet ret from redis: v1 with 219 millisGet ret from redis: v1 with 257 millisGet ret from redis: v1 with 214 millisGet ret from redis: v1 with 211 millisProcess finished with exit code 0

可以看出，第一次500多毫秒，之后都是200多毫秒，速度有提高。