RequestBodyAdvice和ResponseBodyAdvice

RequestBodyAdvice和ResponseBodyAdvice 在spring4中新添加的两个接口

RequestBodyAdvice接口

该接口是在获取@RequestBody参数数据之前进行处理的

public interface RequestBodyAdvice {

   
   boolean supports(MethodParameter methodParameter, Type targetType,
         Class<? extends HttpMessageConverter<?>> converterType);

   
   Object handleEmptyBody(Object body, HttpInputMessage inputMessage, MethodParameter parameter,
         Type targetType, Class<? extends HttpMessageConverter<?>> converterType);

   
   HttpInputMessage beforeBodyRead(HttpInputMessage inputMessage, MethodParameter parameter,
         Type targetType, Class<? extends HttpMessageConverter<?>> converterType) throws IOException;

   
   Object afterBodyRead(Object body, HttpInputMessage inputMessage, MethodParameter parameter,
         Type targetType, Class<? extends HttpMessageConverter<?>> converterType);

}

ResponseBodyAdvice接口

该接口是在消息体被HttpMessageConverter消息解析器写入之前执行的

public interface ResponseBodyAdvice<T> {

   
   boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType);

   
   T beforeBodyWrite(T body, MethodParameter returnType, MediaType selectedContentType,
         Class<? extends HttpMessageConverter<?>> selectedConverterType,
         ServerHttpRequest request, ServerHttpResponse response);

}