Write your own simple Web application Server (4)-File download with socket implementation

Directly on the source:

Server:

1  Packagedownload;2 3 ImportJava.io.BufferedInputStream;4 ImportJava.io.BufferedOutputStream;5 ImportJava.io.File;6 ImportJava.io.FileInputStream;7 Importjava.io.IOException;8 ImportJava.io.OutputStream;9 ImportJava.net.ServerSocket;Ten ImportJava.net.Socket; One  A /** - * Objective: To use the socket to implement the file download. When a client connects to the server, the file is automatically downloaded from the server, and the client - * Name the downloaded file according to the number of milliseconds in the system.  the * Prepare: Prepare the file D:/1.mp3 to be downloaded on the server.    After the client accepts the file, save the file in the D drive, and the file takes the system millisecond number to name.  -  */ -  Public classServer { -      +     PrivateServerSocket SS; -     Private intPort = 8080;//Server-Open port number +     /**using the construction method, initialize the ServerSocket*/ A      PublicServer () { at         Try { -SS =NewServerSocket (port); -}Catch(IOException e) { - e.printstacktrace (); -         } -     } in     /**the server starts and waits for the client to enter. When the client enters, the socket object is generated and the object is given to the thread to execute*/ -      Public voidstart () { to          while(true){ +             Try { -Socket s = ss.accept ();//wait for the client to enter theThread thread =NewThread (NewHandler (s));//using constructors to pass parameters * Thread.run (); $}Catch(IOException e) {Panax Notoginseng e.printstacktrace (); -             } the         } +     } A     Private classHandlerImplementsRunnable { the         PrivateSocket S; +         Private byte[] buf =New byte[1024];//1K-size buffers -          PublicHandler (Socket s) { $              This. S =s; $         } -  -          Public voidrun () { the             Try { -File sourcefile =NewFile ("D:/1.mp3");WuyiFileInputStream FIS =NewFileInputStream (sourcefile); theBufferedinputstream bis =NewBufferedinputstream (FIS); -OutputStream OS =S.getoutputstream (); WuBufferedoutputstream BOS =Newbufferedoutputstream (OS); -                 intsize =-1; About                  while((Size=bis.read (BUF))!=-1){ $Bos.write (buf,0, size); - Bos.flush (); -                 } - s.close (); A fis.close (); +}Catch(Exception e) { the e.printstacktrace (); -             } $         } the  the     } the      Public Static voidMain (string[] args) { theServer s =NewServer (); - S.start (); in     } the}

Client:

1  Packagedownload;2 3 ImportJava.io.BufferedInputStream;4 ImportJava.io.BufferedOutputStream;5 ImportJava.io.File;6 ImportJava.io.FileOutputStream;7 Importjava.io.IOException;8 ImportJava.io.InputStream;9 ImportJava.net.Socket;Ten Importjava.net.UnknownHostException; One /**client program, responsible for downloading files from client*/ A  Public classClient { -     PrivateSocket S; -     Private byte[] buf =New byte[1024];//1K-size buffers the      -      Public voidstart () { -         Try { -s =NewSocket ("192.168.1.103", 8080); +String fileName = "d:/" +system.currenttimemillis () + ". mp3"; -File targetfile =NewFile (fileName); + targetfile.createnewfile (); AFileOutputStream fos =NewFileOutputStream (targetfile); atBufferedoutputstream BOS =NewBufferedoutputstream (FOS); -InputStream is =S.getinputstream (); -Bufferedinputstream bis =NewBufferedinputstream (IS); -             intsize =-1; -              while((Size=bis.read (BUF))!=-1){ -Bos.write (buf,0, size); in Bos.flush (); -             } to s.close (); + fos.close (); -}Catch(unknownhostexception e) { the e.printstacktrace (); *}Catch(IOException e) { $ e.printstacktrace ();Panax Notoginseng         } -     } the      Public Static voidMain (string[] args) { +Client C =NewClient (); A C.start (); the     } +}

Write your own simple Web application Server (4)-File download with socket implementation