Can not get the parameter?

Question

I use a form to upload files,
like this:
<form name="gdform10" action="upload.jsp" ENCTYPE="multipart/form-data" method="post">
<input type="hidden" name="picName" value="wxds.jpg">
<input type="file" name="file">
<input type="submit" name="savePic" value="modify">
</form>
but I can not get the parameter picName in the upload.jsp,
like :
String pname = request.getParameter("picName");
but pname is null.

Answer 1

Hello,
In Jsp, if you want to upload file, you can't directly use "request.getParameter()".
There're two company provide components for you and it's free.
First is jspsmart company, it offer jspsmartUpload component and link is
http://www.jspsmart.com
Second is o'reilly, it offer MultipartRequest component and links is http://www.servlets.com/cos/javadoc/com/oreilly/servlet/MultipartRequest.html
for example, you use oreilly component.
<%@ page import="com.oreilly.servlet.MultipartRequest" %>
String saveDirectory = "c:\\Upload\\";
int maxPostSize = 5 * 1024*1024;
MultipartRequest multi= new MultipartRequest(request,saveDirectory,maxPostSize );
Enumeration filesname = multi.getFileNames();
while(filesname.hasMoreElements()){
String name = (String)filesname.nextElement();
FileName = multi.getFilesystemName(name);
File f = multi.getFile(name);
String ContentType = multi.getContentType(name);
ps. above codes is from book named "java server pages tech reference"