Redis版本：3.2.0 Jedis版本：2.8.1
下面是我连接redis的java代码：

public class TestRedis {
    public static void main(String[] args) {
        String host = args[0];
        int port = Integer.parseInt(args[1]);
        try (Jedis jedis = new Jedis(host, port)) {
            System.out.println("Connected to jedis " + jedis.ping());
        } catch(Exception e){
            e.printStackTrace();
        }
    }
}

我在安装了redis的机器上运行这个程序。公网IP地址为192.168.1.57
如果我提供host=“localhost”和port =“6379”作为参数，那么我就可以成功连接到redis。
然而，如果我在参数中给予host=”192.168.1.57“和port =“6379”，我最终会得到以下异常：

redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused
    at redis.clients.jedis.Connection.connect(Connection.java:164)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:80)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:100)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:95)
    at redis.clients.jedis.BinaryClient.ping(BinaryClient.java:93)
    at redis.clients.jedis.BinaryJedis.ping(BinaryJedis.java:105)
    at TestRedis.main(TestRedis.java:14)
Caused by: java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:579)
    at redis.clients.jedis.Connection.connect(Connection.java:158)
    ... 6 more

请帮帮我...