Downloading PDF file with additional data from a Servlet

How to download PDF file with other data on the same HTTP request to a Servlet? For example, I have a PDF file in my server and I want to respond to a request with that PDF file and other data like myname an开发者_如何学运维d myage, etc on the same request. Can it be done on the same request?

The Java Servlet API does not provide any in-built mechanism for multi-part responses (which is the name of the feature that you are looking for). The Servlet API documentation hints at how this can be achieved, in the ServletResponse API doc:

To send binary data in a MIME body response, use the ServletOutputStream returned by getOutputStream(). To send character data, use the PrintWriter object returned by getWriter(). To mix binary and text data, for example, to create a multipart response, use a ServletOutputStream and manage the character sections manually.

Multipart responses are created by setting the content-type (the MIME type) of the response to "multipart/x-mixed-replace;boundary=xyz". The value xyz is arbitrary and is used to delineate the several sections of the response. An implementation of a Multipart Response class can be found in the book - "Java Servlet Programming" by Jason Hunter, and also in the KickJava site (please read the license before using it in your project).

If this other data is just text, perhaps you could it include it as headers of the response