Compile File Upload Using jsp

If you have used VB To Write File Upload components, it is very easy to use JAVA to Write File Upload JAVABEAN.
The following example is a simplified version.
Package yuanyifileup;
Import java. io .*;
Import java. util .*;
Import javax. servlet .*;
Import javax. servlet. http .*;
Import javax. servlet. jsp. PageContext;

Public class yuanyifileup
{
Private ServletRequest request;
Private ServletResponse response;
Private ServletConfig config;
ServletInputStream DATA;
Int FormSize;
File f1;
FileOutputStream OS;
DataInputStream is;
String filename;
Byte [] B;
Byte t;
Boolean flag = false;
Public yuanyifileup ()
{}
Public void initialize (ServletConfig config, HttpServletRequest request, HttpServletResponse response) throws IOException
{
This. request = request;
This. response = response;
This. config = config;
DATA = request. getInputStream ();
FormSize = request. getContentLength ();
}
Public void initialize (PageContext pageContext) throws IOException
{
Request = pageContext. getRequest ();
Response = pageContext. getResponse ();
Config = pageContext. getServletConfig ();
DATA = request. getInputStream ();
FormSize = request. getContentLength ();
}
Public boolean setFilename (String s)
{
Try
{
File f1 = new File (s );
OS = new FileOutputStream (f1 );
}
Catch (IOException e)
{Return (false );}
Return (true );
}
Public void getByte ()
{
Int I = 0;
Try
{
Is = new DataInputStream (DATA );
B = new byte [FormSize];

While (true)
{
Try
{
T = is. readByte ();
B [I] = t;
I ++;
}
Catch (EOFException e)
{Break ;}
}
Is. close ();}
Catch (IOException e)
{}
}

Public boolean save ()
{
Int I = 0, start1 = 0, start2 = 0;
String temp = "";
If (! Flag)
{
GetByte ();
Flag = true;
}
Try
{
Temp = new String (B, "ISO8859_1 ");
}
Catch (UnsupportedEncodingException e)
{Return (false );}

Start1 = temp. indexOf ("image /");
Temp = temp. substring (start1 );

Start1 = temp. indexOf ("\ r \ n ");

Temp = temp. substring (start1 + 4 );
Start2 = temp. indexOf ("; \ r \ n ");
If (start2! =-1)
{
Temp = temp. substring (0, start2 );
}
Try
{
Byte [] img = temp. getBytes ("ISO8859_1 ");
For (I = 0; I {OS. write (img [I]);}
OS. close ();
}
Catch (IOException e)
{Return (false );}

Return (true );

}
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}