Why is this code not working? I always get size() = 0, whenever i upload file.

xhtml file :-

```
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html">
    <h:head>
        <title>Abc</title>

    </h:head>
    <h:body>
        <center>

            <form method="post" enctype="multipart/form-data" id="form" action="/upload/uploadFile">
                    <input type="file"/>    <br/>
                    <input type="Submit" value="upload"/>
            </form>

        </center>
    </h:body>
</html>

```

This is my servlet :-

```
package servlets;

import java.io.IOException;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

@WebServlet(name="uploadFile", urlPatterns={"/uploadFile"})
public class uploadFile extends HttpServlet {

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException, FileUploadException {
        System.out.println("executed!");
        List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
        System.out.println(items.size());
         for (FileItem item : items) {
                if (!item.isFormField()) {
                    System.out.println("Name: " + item.getName());
                    System.out.println("Size: " + item.getSize());
                    System.out.println("Type: " + item.getContentType());
                }
            }
    } 

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (FileUploadException ex) {
            ex.printStackTrace();
        }
    } 

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (FileUploadException ex) {
            ex.printStackTrace();
        }
    }

    @Override
    public String getServletInfo() {
        return "Short description";
    }

}

```

**Update:**

1) If i just add name = "something" to `input type = "file"`, then it works fine. What logic can be there behind this? 

2) If i use h:form instead of form, then it doesn't work (even my actionListener method doesn't get executed). What reason is there behind this? I read that h:form is not designed to handle multipart/form-data request. Is it true?