Problem on upload multiple files with Struts

[dl...@christian.net]

Hi all,
  I am currently working on a file upload function with struts.
        The original upload function allows multiple file uploads, with JSP's html form submitted to the action. the
uploadform uses dynamic properties, and the jsp file refers to them with formFile[0], formFile[1] ...
    Now I wanna it be able to upload unlimited amount of files, with a selection box listing current "uploaded" file list
and a file selection box to the let user choose new files. And the user is free to remove any prevoiusly "uploaded"
file. All the files are not write  to the database until user presses submit button.
  In this way, we gotta three different "modes" for the Action:
 add -   add the file to the list
 remove - remove it from the list
 submit - submit all files in the list


  My questions:
1) Shall I implement the add/remove function with Javascript, which only operates on the select box(filenames), or
+implement different operations in the UploadAction.

2) For the latter case, the sequence is: the user chooses a file -> click the add button(which submits the form and set  
+parameter action to "add") -> The Action's , and lateron return an ActionForward back to the upload page.

3. If we only needs javascript, how do we retrieve all the datafiles based on their filenames in the action.


Thank you!


---
Regards,
Ding Lei

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