File type and size

[Mohamad Ibrahim]

I want to check the file type and size when i upload it using jsp and struts .
For example, i don't want the user to upload the exe files or the file is bigger than 10mb .
Thanks for help..

[Bear Bibeault]

"MoJava", please check your private messages for an important administrative matter.

[ujjwal soni]

Hi,

You can do this quite easily using struts file upload. check out the below code:


*************Action File

package ujjwal;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;
/**
* @author Ujjwal b soni
* @Web http://ujjwalbsoni.blogspot.com
* @Email [e-mail]
*/

/**
 * Struts File Upload Action Form.
 *
*/
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);
    
      return mapping.findForward("success");
  }
} 

****************Struts config file

<controller maxFileSize="10M" processorClass="ujjwal.StrutsUploadAction">
    <set-property property="inputForward" value="true"/>
    <set-property property="nocache" value="true"/>
</controller>

*****For file type, you can substring the string of file name with last 3 characters excluding dot, it will give you the file extension, alternatively, you can get it from the content type also. The upload class offers many other functionalities. Thats it....