HandlerExceptionResolver (Spring Framework 5.2.12.RELEASE API)

所有已知实现类:
AbstractHandlerExceptionResolver, AbstractHandlerMethodExceptionResolver, DefaultHandlerExceptionResolver, ExceptionHandlerExceptionResolver, HandlerExceptionResolverComposite, ResponseStatusExceptionResolver, SimpleMappingExceptionResolver
```
public interface HandlerExceptionResolver
```
Interface to be implemented by objects that can resolve exceptions thrown during handler mapping or execution, in the typical case to error views. Implementors are typically registered as beans in the application context.
Error views are analogous to JSP error pages but can be used with any kind of exception including any checked exception, with potentially fine-grained mappings for specific handlers.
从以下版本开始:
22.11.2003
作者:
Juergen Hoeller

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`ModelAndView`	`resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)`	Try to resolve the given exception that got thrown during handler execution, returning a `ModelAndView` that represents a specific error page if appropriate.

- 方法详细资料
  - resolveException
```
@Nullable
ModelAndView resolveException(HttpServletRequest request,
                              HttpServletResponse response,
                              @Nullable
                              Object handler,
                              Exception ex)
```
    Try to resolve the given exception that got thrown during handler execution, returning a ModelAndView that represents a specific error page if appropriate.
    The returned ModelAndView may be empty to indicate that the exception has been resolved successfully but that no view should be rendered, for instance by setting a status code.
    参数:
    request - current HTTP request
    response - current HTTP response
    handler - the executed handler, or null if none chosen at the time of the exception (for example, if multipart resolution failed)
    ex - the exception that got thrown during handler execution
    返回:
    a corresponding ModelAndView to forward to, or null for default processing in the resolution chain