Java Socket

服务端

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;

public class SocketServer {
    public static void main(String[] args) throws IOException {
        int port=8999;
        int backlog=2;
        ServerSocket serverSocket=new ServerSocket(port,backlog);
        Socket socket=null;
        try {
            socket=serverSocket.accept();
            System.out.println("socket 连接: "+socket.getRemoteSocketAddress().toString());
            while (true){
                byte[] buf=new byte[1024];
                int len=socket.getInputStream().read(buf);
                System.out.println(new String(buf,0,len));
            }
        }catch (SocketException e){
            System.out.println("客户端断开连接.");
        }finally {
            System.out.println("socket 关闭: "+socket.getRemoteSocketAddress().toString());
            socket.close();
        }
    }
}

客户端

import java.io.*;
import java.net.InetSocketAddress;
import java.net.Socket;

public class SocketClient {
    public static void main(String[] args) throws IOException {
        Socket socket=new Socket();
        socket.connect(new InetSocketAddress(8999));
        OutputStream out=socket.getOutputStream();
        String s;
        BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
        while ((s=reader.readLine())!=null&&s.length()!=0){
            System.out.println(s);
            out.write(s.getBytes());
            out.flush();
        }
    }
}

 这个服务端一次只能处理一个客户端，可以使用telnet localhost 8999测试