spring prefixjson with responsebody

Question

when controller method return is @responsebody , even if i put

Answer 1

JSON in @RequestBody/@ResponseBody is handled by MappingJacksonHttpMessageConverter which is configured in AnnotationMethodHandlerAdapter.messageConverters.

The easy way to configure it without interference with other features is to create a BeanPostProcessor to intercept creation of AnnotationMethodHandlerAdapter, see, for example, here.