Java Basic Knowledge Enhancement Network programming note 07:TCP Server to the client a feedback case

1. First we build the server-side code , as follows:

1  Packagecn.itcast_07;2 3 Importjava.io.IOException;4 ImportJava.io.InputStream;5 ImportJava.io.OutputStream;6 ImportJava.net.ServerSocket;7 ImportJava.net.Socket;8 9  Public classServerdemo {Ten      Public Static voidMain (string[] args)throwsIOException { One         //Create a Server socket object AServerSocket SS =NewServerSocket (9999); -  -         //Listening for client connections theSocket s = ss.accept ();//Blocking -  -         //Get input stream -InputStream is =S.getinputstream (); +         byte[] Bys =New byte[1024]; -         intLen = Is.read (bys);//Blocking +String Server =NewString (bys, 0, Len); ASYSTEM.OUT.PRINTLN ("Server:" +server); at  -         //Get output stream -OutputStream OS =S.getoutputstream (); -Os.write ("Data has been received". GetBytes ()); -  -         //Freeing Resources in s.close (); -         //ss.close (); to     } +}

2. Build the client code as follows:

1  Packagecn.itcast_07;2 3 Importjava.io.IOException;4 ImportJava.io.InputStream;5 ImportJava.io.OutputStream;6 ImportJava.net.Socket;7 8  Public classClientdemo {9      Public Static voidMain (string[] args)throwsIOException {Ten         //creating a Client socket object OneSocket s =NewSocket ("192.168.12.92", 9999); A  -         //Get output stream -OutputStream OS =S.getoutputstream (); theOs.write ("Nice day, good for Sleep". GetBytes ()); -  -         //Get input stream -InputStream is =S.getinputstream (); +         byte[] Bys =New byte[1024]; -         intLen = Is.read (bys);//Blocking +String client =NewString (bys, 0, Len); ASYSTEM.OUT.PRINTLN ("Client:" +client); at  -         //Freeing Resources - s.close (); -     } -}

Open the server side first, as follows:

re-open the client , as follows:

This time we look back at the server side, as follows:

Java Basic Knowledge Enhancement Network programming note 07:TCP Server to the client a feedback case