MultiPart Request RenameFilePolicy

Question

I am trying to avoid some naming conflicts in my uploaded files (I used com.oreilly.servlet.MultipartRequest ).

At this moment my constructor looks like this:

MultipartRequest multi = new MultipartRequest(request, uploadPath);

I would like to implement the constructor with FileRenamePolicy in order to rename my file with a value taken from a form (something like request.getParameterValue("title");

I think I should use the foloowing constructor? But I don't know how to set the "policy" paramter

 MultipartRequest(javax.servlet.http.HttpServletRequest request,
                  java.lang.String saveDirectory, 
                  int maxPostSize, 
                  java.lang.String encoding, 
                  FileRenamePolicy policy) 

Do you have any suggestions? Thanks!

Answer 1

You should implement a custom FileRenamePolicy which gives you the File appending the title sent along with the request.

Here is what you are looking for:

 private static class MyTitleRenamePolicy extends FileRenamePolicy {
      java.io.File rename(java.io.File f) {
       return new File(f.getParentFile(), 
            rename.getName() + "_"+ request.getParameter("title"));
      }
  }

 new MultipartRequest(request, saveDirectory, maxPostSize, encoding, 
                        new MyTitleRenamePolicy(request));