package com.study.util;

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

public class RedisUtil {

    private static final String host = "192.168.150.129";
    
    private static final int port = 6379;
    
    private static final
 
 String password = "1234";
    
    private static JedisPool jedisPool;
    
    
    public static Jedis getJedis() {
        
        JedisPoolConfig config = new JedisPoolConfig(); 
        config.setMaxTotal(20); 
        config.setMaxIdle(5); 
        config.setTestOnBorrow(false); 
        
        jedisPool 
 
= new JedisPool(config,host, port,3000,password);
        Jedis jedis = jedisPool.getResource(); 
        String code = jedis.auth(password); //如果沒有配置密碼驗證，這註掉這句話
        //System.out.println("auth code :" + code);
        jedis.select(1);//選擇第二個數據庫演示
        return jedis;
    }
    
    
    
    public static
 
 void main(String[] args) {
        Jedis jedis = getJedis();
        jedis.close();
    }
    
}

redis連接時遇到的問題：Caused by: java.net.ConnectException: Connection refused: connect

Exception in thread "main" 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:226)
    at com.study.util.RedisUtil.main(RedisUtil.java:50)
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused: connect
    at redis.clients.jedis.Connection.connect(Connection.java:207)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:93)
    at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1767)
    at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:106)
    at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:889)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:433)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:362)
    at redis.clients.util.Pool.getResource(Pool.java:49)
    ... 2 more
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at redis.clients.jedis.Connection.connect(Connection.java:184)

解決方法：

查看是否將默認只能本地訪問redis改為所有IP均可以訪問

bind 127.0.0.1 改為 bind 0.0.0.0

修改redis的配置文件redis.conf 將bind改為0.0.0.0

遇到的問題二：Caused by: java.net.SocketTimeoutException: connect timed out

Exception in thread "main" 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:226)
    at com.study.util.RedisUtil.getJedis(RedisUtil.java:29)
    at com.study.util.RedisUtil.main(RedisUtil.java:39)
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: connect timed out
    at redis.clients.jedis.Connection.connect(Connection.java:207)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:93)
    at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1767)
    at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:106)
    at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:889)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:433)
    at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:362)
    at redis.clients.util.Pool.getResource(Pool.java:49)
    ... 3 more
Caused by: java.net.SocketTimeoutException: connect timed out
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at redis.clients.jedis.Connection.connect(Connection.java:184)
    ... 10 more

解決方法：

• 1.關閉防火墻

• systemctl stop firewalld.service

  

• 2 .開啟6379一個端口

• firewall-cmd --zone=public --add-port=6379/tcp --permanent

  --permanent永久生效，沒有此參數重啟後失效

• 重新載入

firewall-cmd --reload

代碼git地址：https://gitee.com/sjcq/redis.git

redis代碼連接及遇到的問題