Use SOCKET to upload images

Implementation ideas:

The client obtains the file stream, writes the file stream to the output stream specified to a server through socket, and obtains the input stream through socket on the server, write data to a specified folder. To allow multiple users to upload data at the same time, the file operation on the client to be uploaded on the server must be put in another thread to run.

Complete code:

View plain
Import java.net .*;
Import java. Io .*;

/*
The server encapsulates the obtained client in a separate thread.
*/
Class jpgclient2
{
Public static void main (string [] ARGs) throws exception
{
// Check the file
If (ARGs. Length = 0)
{
System. Out. println ("specify a JPG file first! ");
Return;
}
File file = new file (ARGs [0]);
If (! (File. exists () & file. isfile () & file. getname (). endswith (". jpg ")))
{
System. Out. println ("incorrect file selection. Please select a correct file again. ");
Return;
}

// Read the file and write it to the server
Socket S = new socket ("192.168.137.199", 9006 );
Fileinputstream FCM = new fileinputstream (File );
Outputstream out = S. getoutputstream ();
Byte [] Buf = new byte [1, 1024];
Int Len = 0;
While (LEN = FS. Read (BUF ))! =-1)
{
Out. Write (BUF, 0, Len );
}

// Notify the server to end sending data
S. shutdownoutput ();

// Obtain the Server Response
Inputstream in = S. getinputstream ();
Byte [] bufin = new byte [1, 1024];
Int num = in. Read (bufin );
String STR = new string (bufin, 0, num );
System. Out. println (STR );

FCM. Close ();
S. Close ();
}
}

Class jpgthread implements runnable
{
Private socket S;
Jpgthread (socket S)
{
This. S = s;
}
Public void run ()
{
Int COUNT = 1;

String IP = S. getinetaddress (). gethostaddress ();

Try
{
// Obtain client data
Inputstream in = S. getinputstream ();

// Specify the file storage path to read the data submitted by the customer into the file
File dir = new file ("C: \ pic ");
File file = new file (Dir, IP + "(" + Count + ").jpg ");
While (file. exists ())
File = new file (Dir, IP + "(" + (count ++) + ").jpg ");
Fileoutputstream Fos = new fileoutputstream (File );
Byte [] Buf = new byte [1, 1024];
Int Len = 0;
While (LEN = in. Read (BUF ))! =-1)
{
FOS. Write (BUF, 0, Len );
}

// Return the upload status to the client
Outputstream out = S. getoutputstream ();
Out. Write ("File Uploaded successfully". getbytes ());

FOS. Close ();
S. Close ();
}
Catch (exception E)
{
System. Out. println (E. tostring ());
}
}
}
Class jpgserver2
{
Public static void main (string [] ARGs) throws exception
{
Serversocket Ss = new serversocket (9006 );

// Enable concurrent thread access
While (true)
{
Socket S = ss. Accept ();
String IP = S. getinetaddress (). gethostaddress ();
System. Out. println (IP + "... connected ");
New thread (New jpgthread (s). Start ();
}
}
}