socket服务端和client端

package com.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

/**
* 服务器端Socket
*
* @author Administrator
*
*/

public class MyServer {
private Socket socket;
private ServerSocket ss;

public MyServer() throws IOException {
//		ss = new ServerSocket(7777);
//		while (true) {
//			socket = ss.accept();
//			BufferedReader br = new BufferedReader(new InputStreamReader(socket
//					.getInputStream()));
//			System.out.println("you input is : " + br.readLine());
//		}
ServerSocket server=new ServerSocket(9002);
System.out.println("服务成功启动！");
Socket socket=server.accept();
System.out.println("连接成功！");
}

public static void main(String[] args) {
try {
new MyServer();
} catch (IOException e) {
e.printStackTrace();
}
}
}

package com.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.UnknownHostException;

public class MyClient {
Socket client;
PrintWriter pw;

public MyClient() throws UnknownHostException, IOException {
//		client = new Socket("127.0.0.1", 7777);
//		pw = new PrintWriter(client.getOutputStream());
//		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
//		pw.write(br.readLine());
//		pw.close();
//		br.close();
Socket socket= new Socket();
SocketAddress sa;
sa = new InetSocketAddress(InetAddress.getLocalHost(), 9002);
socket.connect(sa, 10000);
}

public static void main(String[] args) {
try {
new MyClient();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}

启动前先运行server端的main方法，然后运行client端的main方法，不然的话 会报错，报：java.net.ConnectException: Connection refused: connect