Using PrintWriter and OutputStream

Question

I am creating a project with struts and I have a problem using Jasper IReports. I want to export some info into a pdf file and I keep getting the java.lang.IllegalStateExcep

Answer 1

Some ideas:

• PrintWriter isn't going to work if you are working with a binary stream (PDF are binary)
• The illegal state might occur if there is client side timeout or disconnect. A packet trace of the process will tell you a lot (even if you can't read them well). Look at WireShark or what is available for your platform. Its worth your time to learn at least a little bit about what happens at the wire level.
• Make sure the data you are getting back from the report generate is actually a pdf. Write it to a file and attempt to open.
• Some situations need you to set the http length header before writing to the stream otherwise they give up when the data starts to show. Might be necessary here.