servlet for file download

servlet| download//File Download servlet

Import javax.servlet.*;
Import javax.servlet.http.*;
Import java.io.*;
Import java.util.*;

public class DownloadFile extends HttpServlet {
private static final String Content_Type = "text/html;" CHARSET=GBK ";
Initialize Global Variables
public void Init () throws Servletexception {
}
Process the HTTP Post request
public void doget (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOException {
Response.setcontenttype (Content_Type);

String pathsavefile;//the file to download
String filename;//The file name displayed in the Save window
Filename=response.encodeurl (New String (Filename.getbytes (), "iso8859_1"))//transcoding

Try
{
Response.reset ();
Response.setcontenttype ("Application/octet-stream");
Response.setheader ("Content-disposition", "attachment; Filename=\ "" "+filename+" "" ");
Servletoutputstream out = Response.getoutputstream ();
InputStream instream=new FileInputStream (pathsavefile);
Loop out the data in the stream
Byte[] B = new byte[1024];
int Len;
while ((Len=instream.read (b)) >0)
Out.write (B,0,len);
}
Out.close ();
Instream.close ();
}
catch (Exception e)
{
System.out.println (e);
}

}
Clean up resources
public void Destroy () {
}
}