[JAVA100 example]044, multithreaded server: Everyone has a share

FileName: Moreserver.java


import java.io.*;


import java.net.*;


import java.util.*;


/**


* <p>title: Multi-threaded server </p>


* <p>description: This example uses multithreading to implement multiple service functions. </p>


* <p>copyright:copyright (c) 2003</p>


* <p>filename: </p>


* @version 1.0


*/


class Moreserver


{


public static void Main (String [] args) throws IOException


{


System.out.println ("Server starting...\n");


//Service with 8000 ports


serversocket Server = new ServerSocket (8000);


while (true)


　 {


//block until customer is connected


Socket SK = server.accept ();


System.out.println ("accepting connection...\n");


//Start service thread


New Serverthread (SK). Start ();


　 }


}


}


//using threads, servicing multiple clients


class Serverthread extends Thread


{


private Socket SK;





Serverthread (Socket SK)


{


this.sk = SK;


}


//Thread run entity


public void Run ()


{


BufferedReader in = null;


printwriter out = null;


try{


InputStreamReader ISR;


ISR = new InputStreamReader (Sk.getinputstream ());


in = new BufferedReader (ISR);


out = new PrintWriter (


New BufferedWriter (


New OutputStreamWriter (


Sk.getoutputstream ()), true);


while (true) {


//receives requests from clients and returns different information according to different commands.


String cmd = In.readline ();


System.out.println (CMD);


if (cmd = null)


break;


cmd = Cmd.touppercase ();


if (Cmd.startswith ("BYE")) {


out.println ("BYE");


break;


}else{


out.println ("Hello, I am the server!") ");


　　　 }


　　 }


}catch (IOException e)


　　 {


System.out.println (e.tostring ());


　　 }


finally


　　 {


System.out.println ("Closing connection...\n");


//FINAL release of resources


try{


if (in!= null)


In.close ();


if (out!= null)


Out.close ();


if (SK!= null)


Sk.close ();


　　　 }


catch (IOException e)


　　　 {


System.out.println ("Close err" +e);


　　　 }


　　 }


}


}


//filename: Socketclient.java


import java.io.*;


import java.net.*;


class Socketthreadclient extends Thread


{


public static int count = 0;


//constructors, implementing services


public socketthreadclient (inetaddress addr)


{


count++;


BufferedReader in = null;


printwriter out = null;


Socket SK = null;


try{


//Using 8000-Port


SK = new Socket (addr, 8000);


InputStreamReader ISR;


ISR = new InputStreamReader (Sk.getinputstream ());


in = new BufferedReader (ISR);


//Set up output


out = new PrintWriter (


New BufferedWriter (


New OutputStreamWriter (


Sk.getoutputstream ()), true);


//Send request to server


System.out.println ("Count:" +count);


out.println ("Hello");


System.out.println (In.readline ());


out.println ("BYE");


System.out.println (In.readline ());


}


catch (IOException e)


　 {


System.out.println (e.tostring ());


　 }


finally


　 {


out.println ("End");


//Free resources


Try


　 {


if (in!= null)


In.close ();


if (out!= null)


Out.close ();


if (SK!= null)


Sk.close ();


　 }


catch (IOException e)


　 {


　 }


　 }


}


}


//Client


public class socketclient{


public static void Main (string[] args) throws Ioexception,interruptedexception


　 {


inetaddress addr = Inetaddress.getbyname (null);


for (int i=0;i<10;i++)


new Socketthreadclient (addr);


Thread.CurrentThread (). Sleep (1000);


　 }


}