Java Socket 示例01

Server 端代码：

package ServerSide;

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

public class EchoServer {

    private int port = 8088;
    private ServerSocket serverSocket;

    public EchoServer() {

        try {
            serverSocket = new ServerSocket(port);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public String echo(String msg) {

        return "echo: " + msg;
    }

    private PrintWriter getWriter(Socket socket) {

        OutputStream socketOut = null;
        try {
            socketOut = socket.getOutputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new PrintWriter(socketOut, true);
    }

    private BufferedReader getReader(Socket socket) {

        InputStream socketIn = null;
        try {
            socketIn = socket.getInputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new BufferedReader(new InputStreamReader(socketIn));
    }

    public void service() {

        while(true) {
            Socket socket = null;
            try {
                socket = serverSocket.accept();
                System.out.println("New connection accepted " + socket.getInetAddress() + ":" + socket.getPort());

                BufferedReader br = getReader(socket);
                PrintWriter pw = getWriter(socket);

                String msg = null;
                while((msg = br.readLine()) != null) {
                    System.out.println(msg);
                    pw.println(echo(msg));
                    if(msg.equals("bye"))
                        break;
                }
            }
            catch (IOException e) {
                e.printStackTrace();
            }
            finally {
                try {
                    if(socket != null) {
                        socket.close();
                    }
                }
                catch (IOException e) {

package ClientSide;

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

public class EchoClient {

    private static String host = "10.11.121.239";
    private static int port = 8088;
    private Socket socket;

    public EchoClient(String hostname) {

        host = hostname;
        try {
            socket = new Socket(host, port);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public EchoClient() {

        this(host);
    }

    private PrintWriter getWriter(Socket socket) {

        OutputStream socketOut = null;
        try {
            socketOut = socket.getOutputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new PrintWriter(socketOut, true);
    }

    private BufferedReader getReader(Socket socket) {

        InputStream socketIn = null;
        try {
            socketIn = socket.getInputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new BufferedReader(new InputStreamReader(socketIn));
    }

    public void talk() {

        try {
            BufferedReader br = getReader(socket);
            PrintWriter pw = getWriter(socket);

            BufferedReader localReader = new BufferedReader(new InputStreamReader(System.in));
            String msg = null;
            while((msg = localReader.readLine()) != null) {
                pw.println(msg);
                System.out.println(br.readLine());

                if(msg.equals("bye"))
                    break;
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        finally {
            try {
                socket.close();
            }
            catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {

        new EchoClient().talk();
    }
}

                    e.printStackTrace();
                }
            }
        }
    }

    public static void main(String[] args) throws IOException {

        new EchoServer().service();
    }
}

Client 代码：