异常Connection refused: connect 是什么原因呢

[不太快乐水]

照着教程视频写的，但是运行服务器类的时候报出这个异常，ip地址没错，不知道为什么，虚心请教

package morepeople;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

public class testServer {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		ServerSocket server = new ServerSocket(9999);

		boolean flag = true;
		while (flag) {
			Socket socket = server.accept();
			MessageHander mh = new MessageHander(socket);

			mh.start();

		}
		server.close();
	}

}

class MessageHander extends Thread {

	private Socket socket;

	public MessageHander(Socket socket) {
		super();
		this.socket = socket;
	}

	@Override
	public void run() {
		try {
			InputStream in = socket.getInputStream();
			InputStreamReader isr = new InputStreamReader(in);
			BufferedReader br = new BufferedReader(isr);

			OutputStream out = socket.getOutputStream();
			PrintStream ps = new PrintStream(out);

			String word;

			while ((word = br.readLine()) != null) {
				if ("bye".equals(word)) {
					break;
				}
				StringBuilder sb = new StringBuilder(word);
				sb.reverse();

				ps.println(sb.toString());
			}

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				socket.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

}

package morepeople;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class testClient {

	public static void main(String[] args) throws UnknownHostException, IOException {
		// TODO Auto-generated method stub
		Socket socket = new Socket("192.168.1.119", 9999);

		OutputStream out = socket.getOutputStream();
		PrintStream ps = new PrintStream(out);

		InputStream is = socket.getInputStream();
		InputStreamReader isr = new InputStreamReader(is);
		BufferedReader br = new BufferedReader(isr);

		Scanner sc = new Scanner(System.in);

		while (true) {
			System.out.println("请输入词语：");
			String word = sc.next();

			ps.println(word);

			if ("bye".equals(word)) {
				break;
			}
			String result = br.readLine();
			System.out.println("从服务器返回的结果：" + result);
		}

		is.close();
		socket.close();
	}

}

异常
Exception in thread "main" java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(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 java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at morepeople.testClient.main(testClient.java:16)

[大隐藏于寺]

如果testServer的main方法在你自己电脑上启动的,那么testClient方法中的socket初始化要修改下ip参数,像下面这样

Socket socket = new Socket("localhost", 9999);

[fastso]

这个异常除了IP地址有错，还有可能是你的服务器端的程序没有正常跑起来。

[小灰狼]

这种情况，基本上是数据库服务器的TCP连接不上，还没有到验证身份的那一步，比如服务器没有开机，数据库服务没有启动，端口被防火墙挡住 等

[Alpaca666]

ping ip 看通不通?telnet ip 端口 看通不通?先确定是不是网络问题

[淹死的虾]

引用 4 楼 Alpaca666 的回复:

ping ip 看通不通?telnet ip 端口 看通不通?先确定是不是网络问题

对

[淹死的虾]

引用 5 楼 淹死的虾 的回复:

引用 4 楼 Alpaca666 的回复:

ping ip 看通不通?telnet ip 端口 看通不通?先确定是不是网络问题

对

1