Change ContentType or CharacterEncoding in Java Filter ONLY IF ContentType === JSON

Question

I\'m trying to ensure that all JSON responses from a Jersey based java application have a UTF-8 character encoding parameter appended to their ContentType header.

So

Answer 1

Not 100% sure I got what you're trying to achieve. Do you want to set the header charset after calling

chain.doFilter(request, response)

?

If that is the case I'm afraid you cannot because very likely at that point, after that chain.doFilter(request, response) has returned and the request processed, the content charset has already been sent to the client and therefore you cannot alter it anymore.