 response character encoding are consulted, in decreasing order of priority: per request,
 perweb-app (using <a href="ServletContext.html#setResponseCharacterEncoding(java.lang.String)"><code>ServletContext.setResponseCharacterEncoding(java.lang.String)</code></a>, deployment descriptor), and per container (for
 all web applications deployed in that container, using vendor specific configuration). The first one of these methods
 that yields a result is returned. Per-request, the charset for the response can