Java Basic Knowledge Enhancement Network programming note 14:tcp multiple clients upload to a server thinking (multithreading improvements)

1. Thinking of uploading multiple clients to a server

A while loop improves the ability of a server to receive multiple clients.

But this is a problem .
If this is the case, let's say I have Zhang San, John Doe, Harry the three of them executing the client separately
Zhang San: study hard. avi (100M) 256k
John Doe: Day to day. mp3 (3M) 1M
Harry: ILoveJava.txt (1k) 100M

This will wait Zhang San Pass, then go to preach John Doe ...

2. Using Multithreading improvements:

(1) Thread class Userthread:

1  Packagecn.itcast_15;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.BufferedWriter;5 ImportJava.io.FileWriter;6 Importjava.io.IOException;7 ImportJava.io.InputStreamReader;8 ImportJava.io.OutputStreamWriter;9 ImportJava.net.Socket;Ten  One  Public classUserthreadImplementsRunnable { A     PrivateSocket S; -  -      PublicUserthread (Socket s) { the          This. S =s; -     } -  - @Override +      Public voidrun () { -         Try { +             //flow within the encapsulated channel ABufferedReader br =NewBufferedReader (NewInputStreamReader ( at S.getinputstream ())); -             //Encapsulating text Files -             //bufferedwriter bw = new BufferedWriter (New -             //FileWriter ("Copy.java")); -  -             //to prevent name collisions inString newName = System.currenttimemillis () + ". Java"; -BufferedWriter BW =NewBufferedWriter (NewFileWriter (NewName)); to  +String line =NULL; -              while(line = Br.readline ())! =NULL) {//Blocking the Bw.write (line); * bw.newline (); $ Bw.flush ();Panax Notoginseng             } -  the             //Give the feedback +BufferedWriter Bwserver =NewBufferedWriter ( A                     NewOutputStreamWriter (S.getoutputstream ())); theBwserver.write ("File Upload succeeded"); + bwserver.newline (); - Bwserver.flush (); $  $             //Freeing Resources - bw.close (); - s.close (); the}Catch(IOException e) { - e.printstacktrace ();Wuyi         } the     } -  Wu}

(2) Client:

1  Packagecn.itcast_15;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.BufferedWriter;5 ImportJava.io.FileReader;6 Importjava.io.IOException;7 ImportJava.io.InputStreamReader;8 ImportJava.io.OutputStreamWriter;9 ImportJava.net.Socket;Ten  One  Public classuploadclient { A      Public Static voidMain (string[] args)throwsIOException { -         //creating a Client socket object -Socket s =NewSocket ("192.168.12.92", 11111); the  -         //Encapsulating text Files -         //bufferedreader br = new BufferedReader (New FileReader ( -         //"Inetaddressdemo.java")); +BufferedReader br =NewBufferedReader (NewFileReader ( -"Receivedemo.java")); +         //Package Channel Internal flow ABufferedWriter BW =NewBufferedWriter (NewOutputStreamWriter ( at S.getoutputstream ())); -  -String line =NULL; -          while(line = Br.readline ())! =NULL) {//Blocking - Bw.write (line); - bw.newline (); in Bw.flush (); -         } to  +         //The socket provides a termination, it notifies the server you don't have to wait, I don't have the data . - s.shutdownoutput (); the  *         //Receive Feedback $BufferedReader brclient =NewBufferedReader (NewInputStreamReader (Panax Notoginseng S.getinputstream ())); -String client = Brclient.readline ();//Blocking the System.out.println (client); +  A         //Freeing Resources the br.close (); + s.close (); -     } $}

(3) Server side:

1  Packagecn.itcast_15;2 3 Importjava.io.IOException;4 ImportJava.net.ServerSocket;5 ImportJava.net.Socket;6 7  Public classUploadserver {8      Public Static voidMain (string[] args)throwsIOException {9         //Create a Server socket objectTenServerSocket SS =NewServerSocket (11111); One  A          while(true) { -Socket s =ss.accept (); -             NewThread (NewUserthread (s)). Start (); the         } -     } -}

Java Basic Knowledge Enhancement Network programming note 14:tcp multiple clients upload to a server thinking (multithreading improvements)