Made a stupid mistake.

/**
* @author KC
*
*/
public class Urlaccessfilter implements Filter {

Private InputStream path;

public void init (Filterconfig filterconfig) throws Servletexception {
}

 public void DoFilter (ServletRequest request, servletresponse response,
   filterchain Filterchain) throws IOException, servletexception {
  system.out.println ("Accessing Hichujian apk");
  path = null;
  system.out.println (path);
  path = This.getclass (). getClassLoader ()
    .getresourceasstream (" Download_count.properties ");
  properties prop = new Properties ();
  fileoutputstream fos = null;
  try {

Prop.load (path);
String Download_number = Prop.getproperty ("number");
System.out.println (Download_number);
Path.close ();
FOS = new FileOutputStream (New File (This.getclass ()
. GetResource ("/"). GetPath ()
+ "download_count.properties"));
int download = Integer.parseint (download_number);
download++;
Prop.setproperty ("Number", string.valueof (download));
Prop.store (FOS, null);
Fos.close ();
/* Filterchain.dofilter (Request, response); */

} catch (Exception e) {
E.printstacktrace ();
}
}

public void Destroy () {
}

}

Made a stupid mistake.