一个简单的Echo Server的Java实现（增强版）

Server:

package midi.socket;

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

public class PowerEchoServer ...{

    /** *//**
     * @param args
     */
    public static void main(String[] args) ...{
        try ...{
            ServerSocket server = new ServerSocket(10000);
            System.out.println("Echo Server started!");
            while (true) ...{
                Socket socket = server.accept();
                System.out.println("a new comer!");
                Runnable r = new EchoHandlerThread(socket, 10000);
                Thread t = new Thread(r);
                t.start();
            }
        } catch (IOException e) ...{
            e.printStackTrace();
        }

    }

}

处理线程：

package midi.socket;

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 EchoHandlerThread implements Runnable ...{

    Socket socket = null;
    int port = 0;
    public EchoHandlerThread(Socket socket, int port) ...{
        this.socket = socket;
        this.port = port;
    }
    public void run() ...{
        try ...{
            InputStream inStream = socket.getInputStream();
            OutputStream outStream = socket.getOutputStream();
            
            BufferedReader br = new BufferedReader(new InputStreamReader(inStream));
            PrintWriter pw = new PrintWriter(outStream);
            
            pw.write("Welcome  ");
            pw.write("Type BYE to exit! ");
            pw.flush();
            boolean done = false;
            String line = null;
            while(!done && (line=br.readLine())!=null) ...{
                pw.write("Echo:"+line+" ");
                pw.flush();
                if(line.trim().equalsIgnoreCase("bye"))
                    done=true;
            }
        } catch (IOException e) ...{
            e.printStackTrace();
        }
        finally ...{
            try ...{
                socket.close();
            } catch (IOException e) ...{
                e.printStackTrace();
            }
        }
        
    }

}