110. Exception Handling Annotations - dkkahm/study-springfamework5 GitHub Wiki

Tools

• @ResponseStatus
  • Annotate custom exception classes to indicate to the framework the HTTP status you want returned when that exception is thrown.
  • Global to the application
• @ExceptionHandler
  • Works at the controller level
  • Allows you to define custom exception handling
    • Can be used with @ResponseStatus for just returning a http status
    • Can be used to return a specific view
    • Also can take total control and work with the Model and View
      • 'Model' cannot be a parameter of an ExceptionHandler method
• HandlerExceptionResolver
  • Interface you can implement for custom exception handling
  • Used Internally by Spring MVC
  • Model is not passed
• SimpleMappingExceptionResolver
  • A Spring Bean you can define to map exceptions to specific views
  • You only define the exception class name (not package) and the view name
  • You can optionally define a default error page

Which to Use When?

• If just setting the HTTP status
  • use @ResponseStatus
• If redirection to a view
  • use SimpleMappingExceptionResolver
• If both
  • consider @ExceptionHandler on the controller