spring注解记录

集中记录spring常见注解 供今后查阅

@ControllerAdvice：

ControllerAdvice的定义为:

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
public @interface ControllerAdvice

ControllerAdvice注解的作用是将@ExceptionHandler、@InitBinder、@ModelAttribute应用到到所有的requestmapping注解中去 (转自开涛的博客)

@ExceptionHandler

当controller中任意一个方法出现该异常时一定会被该方法给拦截 如：

    @ExceptionHandler(UnauthorizedException.class)
    @ResponseStatus(HttpStatus.UNAUTHORIZED)
    public ModelAndView processUnauthenticatedException(NativeWebRequest request,
            UnauthorizedException e){
        ModelAndView mv = new ModelAndView();
        mv.addObject("exception", e);
        mv.setViewName("unauthorized");
        return mv;
    }