Add docs on error handling in REST scenarios

src/asciidoc/web-mvc.adoc

@@ -4053,6 +4053,29 @@ response and write error content with message converters. See the
 
 
 
+[[mvc-ann-rest-exceptions]]
+=== REST Controller Exception Handling
+
+An `@RestController` may use `@ExceptionHandler` methods that return a
+`ResponseEntity` to provide both a response status and error details in the body
+of the response. Such methods may also be added to `@ControllerAdvice`
+classes for exception handling across a subset or all controllers.
+
+A common requirement is to include error details in the body of the response.
+Spring does not automatically do this (although Spring Boot does) because the
+representation of error details in the response body is application specific.
+
+Applications that wish to implement a global exception handling strategy with
+error details in the response body should consider extending the abstract base
+class `ResponseEntityExceptionHandler` which provides handling for the exceptions
+that Spring MVC raises and provides hooks to customize the response body as
+well as to handle other exceptions. Simply declare the extension class as a
+Spring bean and annotate it with `@ControllerAdvice`. For more details see
+See `ResponseEntityExceptionHandler`.
+
+
+
+
 [[mvc-ann-annotated-exceptions]]
 === Annotating Business Exceptions With @ResponseStatus