File upload conflict with BC4JRequestProcessor under 10g

Hello.
I'm using file upload in application designed in JDeveloper 9i with STRUTS framework. Request processor is BC4JRequestProcessor. Application uses file upload performed with form derrived from ActionForm with property of interface FormFile. Everything was OK until migration to 10g was performed. Under 10g, the NullPointerException is reported in MultipartUtil class called from BC4JRequestProcessor. Details:java.lang.NullPointerException
at oracle.jbo.html.struts11.MultipartUtil.populate(MultipartUtil.java:227)
at oracle.jbo.html.struts11.BC4JRequestProcessor.processPopulate(BC4JRequestProcessor.java:433)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254)
...The problem is, that method "populate" of MultipartUtil class doesn't resolve the MultipartRequestHandler parameter and the names of the parameters (Enumeration names) has than a null value. There is a NullPointerException thrown after an attempt of iteration of this enumeration.
Any suggestions?
Thanks.

just found this thread
BC4J MultipartRequestHandler is null

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                if (!(request instanceof MultipartRequestWrapper)) {
                    request = new MultipartRequestWrapper(request);
                    MultipartUtil.setWrapperParams(handler, (MultipartRequestWrapper) request);
                else {
                    // do nothing
        return (request);
Don't forget to set this new class in your struts-config.xml file!
Timo

Error "PPE is working" on File Upload with Oracle Portlet running 10.1.2

I am attempting to perform file upload using an Oracle Portlet running under the 10.1.2 Portal.
All the examples I have seen indicate you must identify the encoding type as "multipart/form-data" in your JSP. When I do this and attempt to submit the page I get a blank screen with the words "PPE is working.".
Looking at the "http-web-access.log" on my OC4J Standalone server I can see that the Standalone server never actually receives the request. For some reason it appears the Portal is not forwarding the request to OC4J like it is suppose to.
Can someone tell me what might be wrong? Does anyone have experience implementing file upload using Oracle Portlets and the 10.1.2 Portal?
Thanks,

I have encountered the same problem 4 years before. Finally i figured out, Oracle Portal is not supporting "multipart/form-data".
Work around is write a servlet program to upload the file into DB.
This blog may help you.. http://bsubramaniam.blogspot.com/search/label/Java%20File%20Upload
--Balaji S

File upload conflict with BC4JRequestProcessor under 10g

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