TCP socket Communication for Java Network programming

1, Client Myclient.java

1 ImportJava.io.*;2 Importjava.net.*;3 4  Public classmyclient5 {6      Public Static voidMain (string[] args)throwsException7     {8Socket s =NewSocket ("192.168.1.1", 30000);9         //client-initiated Clientthread thread continuously reads data from the serverTen         NewThread (NewClientthread (s)). Start (); One         //gets the output stream corresponding to the socket APrintStream PS =NewPrintStream (S.getoutputstream ()); -String line =NULL; -         //constant reading of keyboard input theBufferedReader br =NewBufferedReader ( -             NewInputStreamReader (system.in)); -          while(line = Br.readline ())! =NULL) -         { +             //writes the user's keyboard input to the socket corresponding output stream - ps.println (line); +         } A     } at}

2. Join multi-threading, Clientthread.java

1 ImportJava.io.*;2 Importjava.net.*;3 4  Public classClientthreadImplementsRunnable5 {6     //the thread is responsible for processing the socket7     PrivateSocket S;8     //The input stream corresponding to the socket that the thread is processing9BufferedReader br =NULL;Ten      PublicClientthread (Socket s) One         throwsIOException A     { -          This. S =s; -BR =NewBufferedReader ( the             NewInputStreamReader (S.getinputstream ())); -     } -      Public voidRun () -     { +         Try -         { +String content =NULL; A             //continuously reads the contents of the socket input stream and prints out the contents at              while(content = Br.readline ())! =NULL) -             { - System.out.println (content); -             } -         } -         Catch(Exception e) in         { - e.printstacktrace (); to         } +     } -}

3, server-side Myserver.java

1 Importjava.net.*;2 ImportJava.io.*;3 ImportJava.util.*;4 5  Public classMyServer6 {7     //define the ArrayList that holds all sockets8      Public StaticArraylist<socket>socketlist9=NewArraylist<socket>();Ten      Public Static voidMain (string[] args) One         throwsIOException A     { -System.out.println ("222222 ..."); -ServerSocket SS =NewServerSocket the  -(30000); -          while(true) -         { +SYSTEM.OUT.PRINTLN ("Server Waiting for link ..."); -             //This line of code will block and will wait for someone else's connection +Socket s =ss.accept (); A Socketlist.add (s); at             //each time a client connects, a Serverthread thread is started to service the client -             NewThread (NewServerthread -  - (s)). Start (); -         } -     } in}

4. Add multithreading for server-side communication

1 ImportJava.io.*;2 Importjava.net.*;3 ImportJava.util.*;4 5 //thread class responsible for handling each thread's communication6  Public classServerthreadImplementsRunnable {7     //defines the socket that the current thread handles8Socket s =NULL;9     //The input stream corresponding to the socket that the thread is processingTenBufferedReader br =NULL; One  A      PublicServerthread (Socket s)throwsIOException { -System.out.println ("4444444 ..."); -          This. S =s; the         //initialize the input stream corresponding to the socket -String ip=s.getinetaddress (). gethostaddress (); -SYSTEM.OUT.PRINTLN ("IP address is" +ip+ "... connected!!!"); -BR =NewBufferedReader (NewInputStreamReader (S.getinputstream (), +"Utf-8"));//  -     } +  A      Public voidrun () { atSystem.out.println ("555555 ..."); -         Try { -System.out.println ("4444444 ..."); -String content =NULL; -             //using loops to continuously read the data sent by the client from the socket . -              while(content = Readfromclient ())! =NULL) { in                 /*System.out.println ("---" - + arrays.tostring (content.getbytes ("Utf-8" ));*/ toSYSTEM.OUT.PRINTLN ("---" + "the data sent by the client is" +content); +System.out.println ("==============="); -                 //traverse each socket in the socketlist, the                 //send read content to each socket once *                  for(Iterator<socket> it =MyServer.socketList.iterator (); it $ . Hasnext ();) {Panax NotoginsengSocket s =It.next (); -                     Try { theSystem.out.println ("666666"); +OutputStream OS =S.getoutputstream (); AOs.write (content+ "Server feedback to client OK" + "\ n"). GetBytes ("Utf-8")); theSystem.out.println ("777777"); +}Catch(SocketException e) { - e.printstacktrace (); $                         //Delete the socket.  $ It.remove (); - System.out.println (myserver.socketlist); -                     } the                 } -             }Wuyi}Catch(IOException e) { the e.printstacktrace (); -         } Wu     } -  About     //define methods for reading client data $     PrivateString readfromclient () { -         Try { -             returnbr.readline (); -         } A         //If an exception is caught, the client that corresponds to the socket is closed +         Catch(IOException e) { the e.printstacktrace (); -SYSTEM.OUT.PRINTLN ("The client has been turned off!!! "); $             //Delete the socket.  the MyServer.socketList.remove (s); the         } the         return NULL; the     } -}

TCP socket Communication for Java Network programming