[Java知识库]java连接redis失败解决方案

具体情境~
在win下的idea连接linux中已经开启的redis,

看java代码~

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

public class jredisDemo01 {

    public static void main(String[] args) {
   /*    JedisPool jedisPool = new JedisPool("192.168.135.145",6379);
        Jedis jedis1 = jedisPool.getResource();
        jedis1.set("person","name");*/
        try {
            Jedis jedis = new Jedis("192.168.135.145",6379);
            jedis.set("fruit","lisi");
            String fruit = jedis.get("fruit");
            System.out.println(fruit);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

运行后报错~

redis.clients.jedis.exceptions.JedisConnectionException: Failed to connect to any host resolved for DNS name.
	at redis.clients.jedis.DefaultJedisSocketFactory.connectToFirstSuccessfulHost(DefaultJedisSocketFactory.java:63)
	at redis.clients.jedis.DefaultJedisSocketFactory.createSocket(DefaultJedisSocketFactory.java:87)
	at redis.clients.jedis.Connection.connect(Connection.java:180)
	at redis.clients.jedis.Connection.sendCommand(Connection.java:152)
	at redis.clients.jedis.Connection.executeCommand(Connection.java:121)
	at redis.clients.jedis.Jedis.set(Jedis.java:4725)
	at com.gavin.jredisDemo01.main(jredisDemo01.java:16)
	Suppressed: java.net.SocketTimeoutException: connect timed out
		at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method)
		at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:107)
		at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
		at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
		at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
		at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)
		at java.base/java.net.Socket.connect(Socket.java:591)
		at redis.clients.jedis.DefaultJedisSocketFactory.connectToFirstSuccessfulHost(DefaultJedisSocketFactory.java:73)
		... 6 more

异常~Failed to connect to any host resolved for DNS name. connect timed out
异常发生之前----->>

1,注掉redis配置文件中bind—>>使得外部可以连接到redis (也可以指定连接地址)

2,保护模式已经关闭—>>不用输入密码可以连接

3,以设置守护模式 -->>使得redis可以在后台运行

最后查看端口号是否对外开放~

[root@localhost bin]# sudo firewall-cmd --zone=public --add-port=6379/tcp --permanent
success
[root@localhost bin]# systemctl restart firewalld

注意~之后要重启防火墙,使得开放端口生效

再次运行代码~

正常了