Getting parameters from text and file input tag. . canyou help me ?

Question

Hello!
Is there anyway of getting parameters from an
text field input in a form like :
<form name="signinForm" method="post" action="uploadFile.jsp" enctype="multipart/form-data" >Actually I would like to insert the parameters and make the upload of an file
on the same form. It is something likethis :
Form.jsp
<form name="signinForm" method="post" action="uploadFile.jsp" enctype="multipart/form-data" >   
<input type="text" id="name" name="signinName" />
<input name="signinFile" id="fileUp" type="file" />   
<input type="submit" id="submit_btn" name="signinSubmit"/>uploadingFile.jsp
<%@ page import="java.io.*,javax.servlet.http.HttpServletRequest,javax.servlet.ServletInputStream" %>
<%@ page import="java.io.FileWriter,java.io.IOException" %>
<%
.//upload the file
String email = request.getParameter("signinName").trim(); //this line is bringing me an NullPointerException
%>Thanks in advance for any suggestion!!
All the best!

Answer 1

You cannot use the HttpServletRequest object to retrieve parameters from a multipart form. You'll have to use a package that can parse such a form. I suggest Apache commons FileUpload.
http://jakarta.apache.org/commons/fileupload/
Using this package you can get both the file upload and any other parameters.