Socket编程

/**
 *客户端
 */
import java.io.*;
import java.net.*;

public class Client {
    Socket socket;
    BufferedReader in;
    PrintWriter out;

    public Client() {
        try {
            socket = new Socket("xxx.xxx.xxx.xxx", 10000);
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            out = new PrintWriter(socket.getOutputStream(), true);
            BufferedReader line = new BufferedReader(new InputStreamReader(System.in));
            out.println(line.readLine());
            
            line.close();
            out.close();
            in.close();
            socket.close();
        } catch (IOException e) {
        }
    }

    public static void main(String[] args) {
        new Client();
    }
}

/**
 * 监听一个客户的服务器端
 */
import java.net.*;
import java.io.*;

public class Server {
    private ServerSocket ss;
    private Socket socket;
    private BufferedReader in;
    private PrintWriter out;

    public Server() {
        try {
            ss = new ServerSocket(10000);
            while (true) {
                socket = ss.accept();
                in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                out = new PrintWriter(socket.getOutputStream(), true);
                String line = in.readLine();
                out.println("you input is :" + line);
                
                out.close();
                in.close();
                socket.close();
                ss.close();
            }
        } catch (IOException e) {
        }
    }

    public static void main(String[] args) {
        new Server();
    }
}

/**
 * 监听多个客户的服务器端
 * 
 * 主程序监听一端口，等待客户接入；同时构造一个线程类，准备接管会话。
 * 当一个Socket会话产生后，将这个会话交给线程处理，然后主程序继续监听。
 */
import java.io.*;
import java.net.*;

public class MultiServer extends ServerSocket {
    private static final int SERVER_PORT = 10000;

    public MultiServer() throws IOException {
        super(SERVER_PORT);
        try {
            while (true) {
                Socket socket = accept();
                new CreateServerThread(socket);
            }
        } catch (IOException e) {
        } finally {
            close();
        }
    }

    // --- CreateServerThread
    class CreateServerThread extends Thread {
        private Socket client;
        private BufferedReader in;
        private PrintWriter out;

        public CreateServerThread(Socket s) throws IOException {
            client = s;
            in = new BufferedReader(new InputStreamReader(
                    client.getInputStream(), "GB2312"));
            out = new PrintWriter(client.getOutputStream(), true);
            out.println("--- Welcome ---");
            start();
        }

        public void run() {
            try {
                String line = in.readLine();
                while (!line.equals("bye")) {
                    String msg = createMessage(line);
                    out.println(msg);
                    line = in.readLine();
                }
                out.println("--- See you, bye! ---");
                client.close();
            } catch (IOException e) {
            }
        }

        private String createMessage(String line) {
            // xxxxxxxxx;
            return line;
        }
    }

    public static void main(String[] args) throws IOException {
        new MultiServer();
    }
}