<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.7.3</version>
</dependency>

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

public class RedisUtils {
    //服務(wù)器IP地址
    private static String ADDR = "127.0.0.1";
//端口
    private static int PORT = 6379;
//密碼
    private static String AUTH = "123456";
//連接實(shí)例的最大連接數(shù)
    private static int MAX_ACTIVE = 1024;
  //控制一個(gè)pool最多有多少個(gè)狀態(tài)為idle(空閑的)的jedis實(shí)例，默認(rèn)值也是8。
    private static int MAX_IDLE = 200;

    //等待可用連接的最大時(shí)間，單位毫秒，默認(rèn)值為-1，表示永不超時(shí)。如果超過等待時(shí)間，則直接拋出JedisConnectionException
    private static int MAX_WAIT = 10000;

//連接超時(shí)的時(shí)間　　
    private static int TIMEOUT = 10000;

// 在borrow一個(gè)jedis實(shí)例時(shí)，是否提前進(jìn)行validate操作；如果為true，則得到的jedis實(shí)例均是可用的；
    private static boolean TEST_ON_BORROW = true;

    private static JedisPool jedisPool = null;

    /**
     * 初始化Redis連接池
     */

    static {

        try {

            JedisPoolConfig config = new JedisPoolConfig();
            config.setMaxTotal(MAX_ACTIVE);
            config.setMaxIdle(MAX_IDLE);
            config.setMaxWaitMillis(MAX_WAIT);
            config.setTestOnBorrow(TEST_ON_BORROW);
            jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT);

        } catch (Exception e) {

            e.printStackTrace();
        }

    }
    public synchronized  static Jedis getJedis(){
        if(jedisPool==null){
            return null;
        }
        return jedisPool.getResource();
    }
    public static void closeJedis(Jedis jedis){
        jedis.close();
    }

    public static void main(String[] args) {
        String a = getJedis().get("a");
        System.out.println(a);
    }
}