@Override
    protected void prepareResponse(HttpServletRequest request, //
                                   HttpServletResponse response) {

        setResponseContentType(request, response);
        response.setCharacterEncoding(fastJsonConfig.getCharset().name());
        if (this.disableCaching) {
            response.addHeader("Pragma", "no-cache");
            response.addHeader("Cache-Control", "no-cache, no-store, max-age=0");
            response.addDateHeader("Expires", 1L);
        }
    }
Set JSONP request parameter names. Each time a request has one of those
parameters, the resulting JSON will be wrapped into a function named as
specified by the JSONP request parameter value.
<p>The parameter names configured by default are "jsonp" and "callback".

@see <a href="http://en.wikipedia.org/wiki/JSONP">JSONP Wikipedia article</a>
@since 4.1
src/main/java/com/alibaba/fastjson/support/spring/FastJsonJsonView.java