Input TYPE TEXT Value from JSP form (enctype=“multipart/form-data”) returns null [duplicate]

Question

This question already has an answer here:

• How to upload files to server using JSP/Servlet? 12 answers

I need to upload an image:

<form method="post" action="hi.iq/register.jsp" enctype="multipart/form-data">
    Name: <input type="text" name="name" value="J.Doe">
    file: <input type="file" name="file-upload">
    <input type="submit">
</form> 

In my servlet I gave

response.setContentType("text/html");

PrintWriter out = response.getWriter();    

String name = request.getParameter("name");

System.out.println("user_id========= "+name);

but the value of name is returned as NULL.

Pls Help

Answer 1

Try <input type="text" id="name" name="name" value="J.Doe">.

Edit:

A sample using Apache Commons Fileupload, as suggested by David's answer:

FileItemFactory factory = new DiskFileItemFactory();

// Set factory constraints
// factory.setSizeThreshold(yourMaxMemorySize);
// factory.setRepository(yourTempDirectory);

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload( factory );
// upload.setSizeMax(yourMaxRequestSize);

// Parse the request
List<FileItem> uploadItems = upload.parseRequest( request );

for( FileItem uploadItem : uploadItems )
{
  if( uploadItem.isFormField() )
  {
    String fieldName = uploadItem.getFieldName();
    String value = uploadItem.getString();
  }
}

Answer 2

Try

     FileItemFactory factory = new DiskFileItemFactory();
     ServletFileUpload upload = new ServletFileUpload(factory);
     Iterator<FileItem> iterator = upload.parseRequest(request).iterator();
     File uploadedFile;
     String dirPath="D:\fileuploads";
     while (iterator.hasNext()) {

                    FileItem item = iterator.next();
                    if (!item.isFormField()) {

                        String fileNameWithExt = item.getName();

                        File filePath = new File(dirPath);

                        if (!filePath.exists()) {
                            filePath.mkdirs();
                        }

                        uploadedFile = new File(dirPath + "/" + fileNameWithExt);
                        item.write(uploadedFile);                  
                    }
                    else {
            String otherFieldName = item.getFieldName();
            String otherFieldValue = item.getString()
                    }
               }

It needs Apache commons-fileupload.jar and commons-io.jar

Answer 3

No container that I have used supports multipart encoded requests out of the box. Due to this, it cannot parse parameters and you cannot use request.getParameter() out of the box.

You need to use something on the server side like Apache Commons FileUpload to preprocess the request

Answer 4

The null value returned by the request.getParameter("name"); is due to the fact that you are using enctype="multipart/form-data" in your html form.

This has been thoroughly answered in this post.

Answer 5

Add Annotaion @javax.servlet.annotation.MultipartConfig and then just simply use request.getParameter() it will work Perfectly.

Or If you are using MultipartFormDataRequest then use its object Like MultipartFormDataRequest mrequest; in place of request for ex. mrequest.getParameter("name"); It works.