How to save uploaded file in JSF

Question

I am uploading a file in JSF. I am using Tomahawk\'s for this, but the same question is applicable on e.g. PrimeFaces

Answer 1

PrimeFaces uses two file upload decoder for uploading content of p:fileupload

1. NativeFileUploadDecoder
2. CommonsFileUploadDecoder

NativeFileUploadDecoder is the default upload decoder and it requires servlet container 3.0. So if your servlet container is less than 3 then it will not work with you. Also some application servers make a restriction on using multi-part content

So if you have a problem with the native upload decoder for any reason you have to use the other decoder which is "CommonsFileUploadDecoder"

CommonsFileUploadDecoder depends on Apache common lib so you have to put the commons-fileupload and commons-io jars in your class-path the version depends on your primefaces version but 1.3 and 2.2 respectively works for me.

to use CommonsFileUploadDecoder you have to use filter

    PrimeFaces FileUpload Filter
    org.primefaces.webapp.filter.FileUploadFilter


    PrimeFaces FileUpload Filter
    Faces Servlet

wait the filter only will not work because inside the filter it checks about the uploader if its not provided and it detect at least JSF 2.2 so it will bypass the request to the default decoder "Native" and then it will not work for your also

to force the filter to use the common decoder you have to put the following context param in your web.xml

primefaces.UPLOADER
   commons