validation on file size

[kirtichopra2003]

hi all
I want to validate file on its size. i have to write validation.xml for that action
what should be the parameter i should use the one i am doing is not working.
<validators>
<field name="upload">
<field-validator type=" ???">(i dont know what should i give it here)
<param name="size">2 MB</param>
<message key="Size cannot be more than 2 MB"/>
</field-validator>
</field>
</validators>

[travishein]

the [struts] validators are only useful for all form fields except file upload field. uploaded files are usually handled by commons-fileupload, and the file contents are not automatically available to your bean. well, in the form class or action handler you could use code to get a reference on the file upload object and query the size and fail it there. , and in that case make the maximum size a configurable value in the struts-config.xml or other property file.

public class StrutsUploadAction extends Action
{
  public ActionForward execute(
    ActionMapping mapping,
    ActionForm form,
    HttpServletRequest request,
    HttpServletResponse response) throws Exception{
    StrutsUploadForm myForm = (StrutsUploadForm)form;

        // Process the FormFile
        FormFile myFile = myForm.getTheFile();
        String contentType = myFile.getContentType();
        String fileName    = myFile.getFileName();
        int fileSize       = myFile.getFileSize();
        byte[] fileData    = myFile.getFileData();
    System.out.println("contentType: " + contentType);
    System.out.println("File Name: " + fileName);
    System.out.println("File Size: " + fileSize);
 
 // validate size < 2MB
  if ( fileSize > 2000000) {
    return mapping.findForward("Error");
  }   

      return mapping.findForward("success");
  }
}

see also: struts file upload max size 5 mb,struts file upload max size 5 mb Tutorial, Tutorials struts file upload max size 5 mb,Example code struts file upload max size 5 mb, Java struts file upload max size 5 mb