SpringMVC之Controller的全局控制

• @ControllerAdvice
  
  • @ExceptionHandler 捕捉Controller中发生的异常
  • @InitBinder 设置WebDataBinder，即设置请求数据中的统一操作，过滤，添加等等
  • @ModelAttribute 绑定键值对到Model中，在Spring中，所有的请求都会有一个Model

@ControllerAdvice
public class ExceptionHandlerAdvice {
    @ExceptionHandler(value = Exception.class)
    public ModelAndView exception(Exception exception, WebRequest request) {
        ModelAndView modelAndView =
                new ModelAndView("error");
        modelAndView.addObject("errorMessage", exception.getMessage());
        return modelAndView;
    }

    @InitBinder
    public void initBinder(WebDataBinder webDataBinder) {
        webDataBinder.setDisallowedFields("time");
    }

    @ModelAttribute
    public void addAttributes(Model model) {
        model.addAttribute("time", new Date().getTime());
    }

}