Customer/server interaction in the form of stream socket connection

Import java. AWT. borderlayout;
Import java. AWT. container;
Import java. AWT. event. actionevent;
Import java. AWT. event. actionlistener;
Import java. Io. eofexception;
Import java. Io. ioexception;
Import java. Io. objectinputstream;
Import java. Io. objectoutputstream;
Import java.net. serversocket;
Import java.net. Socket;

Import javax. Swing. jframe;
Import javax. Swing. jscrollpane;
Import javax. Swing. jtextarea;
Import javax. Swing. jtextfield;
Import javax. Swing. swingutilities;

// Server type
Public class Server extends jframe {
Private Static final long serialversionuid = 1l;

Private jtextfield enterfield; // input dialog box
Private jtextarea displayarea; // display content
Private objectoutputstream output; // output stream
Private objectinputstream input; // input stream
Private serversocket server; // Server Object
Private socket connection; // connection object
Private int counter = 1;

Public server (){
Super ("server ");

Container = getcontentpane ();

Enterfield = new jtextfield ();
Enterfield. seteditable (false );
Enterfield. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
Senddata (event. getactioncommand (); // send data
Enterfield. settext ("");
}
});

Container. Add (enterfield, borderlayout. North );

Displayarea = new jtextarea ();
Container. Add (New jscrollpane (displayarea), borderlayout. center );

Setsize (300,150 );
Setvisible (true );
}

Public void runserver (){
Try {
Server = new serversocket (12345,100); // create a Server Object with port 12345 and a maximum of 100 connections

While (true ){
Waitforconnection (); // wait for the connection
Getstreams (); // receives and sends bytes.
Processconnection (); // process input and output for communication
}
} Catch (eofexception ){
// Todo: handle exception
System. Err. println ("server terminated connection ");
} Catch (ioexception ){
// Todo: handle exception
Ioexception. printstacktrace ();
}
Finally {
Closeconnection (); // close the connection
++ Counter;
}
}

Private void waitforconnection () throws ioexception {
Displaymessage ("waiting for connection/N ");
Connection = server. Accept (); // listen to the customer's connection
Displaymessage ("connection" + counter + "received from :"
+ Connection. getinetaddress (). gethostname (); // obtain the client name.
}
 
Private void getstreams () throws ioexception {
Output = new objectoutputstream (connection. getoutputstream (); // get the output stream
Output. Flush (); // refresh the buffer

Input = new objectinputstream (connection. getinputstream (); // get the input stream

Displaymessage ("/ngot I/O streams/N ");
}
 
Private void processconnection () throws ioexception {
String message = "connection successful ";
Senddata (Message );

Settextfieldeditable (true );

Do {
Try {
Message = (string) Input. readobject (); // obtain the input information.
Displaymessage ("/N" + message );
} Catch (classnotfoundexception ){
// Todo: handle exception
Displaymessage ("/nunknow object type already ed ");
}
} While (! Message. Equals ("client >>> terminate"); // terminate ends
}
 
Private void closeconnection (){
Displaymessage ("/nterminating connection/N ");
Settextfieldeditable (false );

Try {
Output. Close ();
Input. Close ();
Connection. Close ();
} Catch (ioexception ){
// Todo: handle exception
Ioexception. printstacktrace ();
}
}
 
Private void senddata (string message ){
Try {
Output. writeobject ("server >>>" + message); // write data
Output. Flush ();
Displaymessage ("/nserver >>>" + message );
} Catch (ioexception ){
// Todo: handle exception
Displayarea. append ("/nerror writing object ");
}
}
 
Private void displaymessage (final string messagetodisplay ){
Swingutilities. invokelater (New runnable () {// internal class, so that the content can be correctly displayed in the thread
Public void run (){
Displayarea. append (messagetodisplay );
Displayarea. setcaretposition (displayarea. gettext (). Length (); // After the cursor is positioned to the last character
}
});
}
 
Private void settextfieldeditable (final Boolean editable ){
Swingutilities. invokelater (New runnable (){
Public void run (){
Enterfield. seteditable (editable );
}
});
}

/**
* @ Param ARGs
*/
Public static void main (string [] ARGs ){
// Todo auto-generated method stub
Server application = new server ();
Application. setdefaclocloseoperation (jframe. exit_on_close );
Application. runserver ();
}

}

 

 

 

 

Package classwork;

Import java. AWT. borderlayout;
Import java. AWT. container;
Import java. AWT. event. actionevent;
Import java. AWT. event. actionlistener;
Import java. Io. eofexception;
Import java. Io. ioexception;
Import java. Io. objectinputstream;
Import java. Io. objectoutputstream;
Import java.net. inetaddress;
Import java.net. Socket;

Import javax. Swing. jframe;
Import javax. Swing. jscrollpane;
Import javax. Swing. jtextarea;
Import javax. Swing. jtextfield;
Import javax. Swing. swingutilities;

// Customer class
Public class Client extends jframe {
Private Static final long serialversionuid = 1l;

Private jtextfield enterfield;
Private jtextarea displayarea;
Private objectoutputstream output;
Private objectinputstream input;
Private Socket Client;
Private string chatserver;
Private string message = "";
 
Public client (string host ){
Super ("client ");

Chatserver = host; // server address

Container = getcontentpane ();

Enterfield = new jtextfield ();
Enterfield. seteditable (false );
Enterfield. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
Senddata (event. getactioncommand ());
Enterfield. settext ("");
}
});

Container. Add (enterfield, borderlayout. North );

Displayarea = new jtextarea ();
Container. Add (New jscrollpane (displayarea), borderlayout. center );

Setsize (300,150 );
Setvisible (true );
}
 
Private void runclient (){
Try {
Connecttoserver (); // create a socket and prepare for connection
Getstreams ();
Processconnection ();
} Catch (eofexception ){
// Todo: handle exception
System. Err. println ("client terminated connection ");
} Catch (ioexception ){
// Todo: handle exception
Ioexception. printstacktrace ();
}

Finally {
Closeconnection ();
}
}
 
Private void connecttoserver () throws ioexception {
Displaymessage ("attempting connection/N ");

Client = new socket (inetaddress. getbyname (chatserver), 12345); // connect to the server

Displaymessage ("connected to:" + client. getinetaddress (). gethostname ());
}
 
Private void getstreams () throws ioexception {
Output = new objectoutputstream (client. getoutputstream ());
Output. Flush ();

Input = new objectinputstream (client. getinputstream ());

Displaymessage ("/ngot I/O streams/N ");
}
 
Private void processconnection () throws ioexception {
Settextfieldeditable (true );

Do {
Try {
Message = (string) Input. readobject ();
Displaymessage ("/N" + message );
} Catch (classnotfoundexception ){
// Todo: handle exception
Displaymessage ("/nunknow object type already ed ");
}
} While (! Message. Equals ("server >>> terminate "));
}
 
Private void closeconnection (){
Displaymessage ("/nclosing connection ");
Settextfieldeditable (false );

Try {
Output. Close ();
Input. Close ();
Client. Close ();
} Catch (ioexception ){
// Todo: handle exception
Ioexception. printstacktrace ();
}
}
 
Private void senddata (string message ){
Try {
Output. writeobject ("client >>>" + message );
Output. Flush ();
Displaymessage ("/nclient >>>" + message );
} Catch (ioexception ){
// Todo: handle exception
Displayarea. append ("/nerror writing object ");
}
}
 
Private void displaymessage (final string messagetodisplay ){
Swingutilities. invokelater (New runnable (){
Public void run (){
Displayarea. append (messagetodisplay );
Displayarea. setcaretposition (displayarea. gettext (). Length ());
}
});
}
 
Private void settextfieldeditable (final Boolean editable ){
Swingutilities. invokelater (New runnable (){
Public void run (){
Enterfield. seteditable (editable );
}
});
}
/**
* @ Param ARGs
*/
Public static void main (string [] ARGs ){
// Todo auto-generated method stub
Client application;

If (ARGs. Length = 0) // if no Server IP address is specified, it communicates with the Local Computer and localhost is used for testing.
Application = new client ("127.0.0.1 ");
Else
Application = new client (ARGs [0]);

Application. setdefaclocloseoperation (jframe. exit_on_close );
Application. runclient ();
}

}