Base64 encoding/Decoding for image data (implemented in Java)

Package com. Vista. test;

Import java. Io. fileinputstream;
Import java. Io. fileoutputstream;
Import java. Io. ioexception;
Import java. Io. inputstream;
Import java. Io. outputstream;

Import sun. Misc. base64decoder;
Import sun. Misc. base64encoder;

Public class mytest
{
Public static void main (string [] ARGs)
{
String strimg = getimagestr ();
Generateimage (strimg );
}
Public static string getimagestr ()
{// Convert an image file into a byte array string and encode it with base64
String imgfile = "D: // 111.jpg"; // the image to be processed.
Inputstream in = NULL;
Byte [] DATA = NULL;
// Read the image byte array
Try
{
In = new fileinputstream (imgfile );
Data = new byte [IN. Available ()];
In. Read (data );
In. Close ();
}
Catch (ioexception E)
{
E. printstacktrace ();
}
// Encode the byte array base64
Base64encoder encoder = new base64encoder ();
Return encoder. encode (data); // return a base64-encoded byte array string
}
Public static Boolean generateimage (string imgstr)
{// Decodes the byte array string using base64 and generates an image
If (imgstr = NULL) // the image data is empty.
Return false;
Base64decoder decoder = new base64decoder ();
Try
{
// Base64 Decoding
Byte [] B = decoder. decodebuffer (imgstr );
For (INT I = 0; I <B. length; ++ I)
{
If (B [I] <0)
{// Adjust abnormal data
B [I] ++ = 256;
}
}
// Generate a JPEG Image
String imgfilepath = "D: // 222.jpg"; // New Image
Outputstream out = new fileoutputstream (imgfilepath );
Out. Write (B );
Out. Flush ();
Out. Close ();
Return true;
}
Catch (exception E)
{
Return false;
}
}
}