Redis-1-解决报错：ERR Client sent AUTH, but no password及Could not get a resource from the pool

1.报错：

redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
	at redis.clients.util.Pool.getResource(Pool.java:53)
	at redis.clients.jedis.JedisPool.getResource(JedisPool.java:99)
	at com.jyc.LowSpeed.Redis.RedisUtil.getJedis(RedisUtil.java:58)
	at com.jyc.LowSpeed.middleWare.ServerMQTT.main(ServerMQTT.java:122)
Caused by: redis.clients.jedis.exceptions.JedisDataException: ERR Client sent AUTH, but no password is set
	at redis.clients.jedis.Protocol.processError(Protocol.java:117)
	at redis.clients.jedis.Protocol.process(Protocol.java:151)
	at redis.clients.jedis.Protocol.read(Protocol.java:205)
	at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:297)
	at redis.clients.jedis.Connection.getStatusCodeReply(Connection.java:196)
	at redis.clients.jedis.BinaryJedis.auth(BinaryJedis.java:2049)
	at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:89)
	at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:836)
	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:434)
	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:361)
	at redis.clients.util.Pool.getResource(Pool.java:49)

2.解决办法：

很明显，提示Redis并没有设置密码，而你在创建时设置了密码，所以请将密码去掉 （也不能设置为空）

下面是Redis工具类封装，推荐使用：

注意改为：jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT);

package com.jyc.LowSpeed.Redis;

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

public final class RedisUtil {

    //Redis服务器IP
    private static String ADDR = "localhost";

    //Redis的端口号
    private static int PORT = 6379;

    //访问密码  Redis配置文件内修改
    private static String AUTH = "foobared";

    //可用连接实例的最大数目，默认值为8；
    //如果赋值为-1，则表示不限制；如果pool已经分配了maxActive个jedis实例，则此时pool的状态为exhausted(耗尽)。
    private static int MAX_ACTIVE = 1024;

    //控制一个pool最多有多少个状态为idle(空闲的)的jedis实例，默认值也是8。
    private static int MAX_IDLE = 200;

    //等待可用连接的最大时间，单位毫秒，默认值为-1，表示永不超时。如果超过等待时间，则直接抛出JedisConnectionException；
    private static int MAX_WAIT = 10000;

    private static int TIMEOUT = 100000;

    //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；
    private static boolean TEST_ON_BORROW = true;

    private static JedisPool jedisPool = null;

    /**
     * 初始化Redis连接池
     */
    static {
        try {
            JedisPoolConfig config = new JedisPoolConfig();
            config.setMaxTotal(MAX_ACTIVE);
            config.setMaxIdle(MAX_IDLE);
            config.setTestOnBorrow(TEST_ON_BORROW);
//            jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT, AUTH);
            jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取Jedis实例
     * @return
     */
    public synchronized static Jedis getJedis() {
        try {
            if (jedisPool != null) {
                Jedis resource = jedisPool.getResource();
                return resource;
            } else {
                return null;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 释放jedis资源
     * @param jedis
     */
    public static void returnResource(final Jedis jedis) {
        if (jedis != null) {
            jedis.close();
        }
    }
}