Java Socket 示例01

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();
    }
}