multipart/form parameter is coming null

Question

I'm trying to get the request parameters that are sent by a form enctype "multipart/form-data". I am using apache commons fileupload.

My code is below.

FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
List items = upload.parseRequest(req);
Iterator uploadIterator = items.iterator();

while(uploadIterator.hasNext()){
FileItem uploadedItem = (FileItem) uploadIterator.next();


if (uploadedItem.isFormField()){

  if (uploadedItem.getFieldName().equals("name")){
    name = uploadedItem.getString();
  }
}else{
  //Uploaded files comes here
}

The HTML code of the form is:

<form name="form" id="form" method="post" action="ServletIncluirEvento"
    enctype="multipart/form-data">
... //Here comes a lot of inputs (I changed the name of the attribute because I am from Brazil and the names are in portuguese)

<select size="9" id="idOpcoesSelecionadas" name="opcoesSelecionadas" multiple style="width: 100%;">
                                            <%  
 it =  colecaoUsuarioSelecionado.iterator();                             String name= "";
 while (it.hasNext()) {
 usuario = (Usuario) it.next();
 name += usuario.getName() + "/"; %>
 <option value="<%=usuario.getLogin()%>">
    <%=usuario.getName()%>
 </option>
<%
  }
%></select>

<input type="hidden" value="<%=name%>" name="name" />

Even so the parameter is coming null.

Someone knows how to solve?

Thank you in advance

Answer 1

To resolve the problem, I redid the jsp page with a tag form enctype "multipart/form-data" for the images that I must upload and, for the other data, a normal form, wich I can get the request parameters normally.

I also did a refactoring to improve the logic.

Thanks for everyone for the tips.