Spring的异常处理@ExceptionHandler注解解析

@Controller
@RequestMapping("/testController")
public class TestController {
    @RequestMapping("/demo1")
    @ResponseBody
    public Object demo1(){
       //不需要try {} catch {}
        int i = 1 / 0;
        return new Date();
    }
  //TestController 内的任何异常都会被兜住
    @ExceptionHandler({RuntimeException.class})
    public ModelAndView fix(Exception ex){
        System.out.println("do This");
        return new ModelAndView("error",new ModelMap("ex",ex.getMessage()));
    }
}

/**
 * Created by liuruijie on 2016/12/28.
 * 全局异常处理，捕获所有Controller中抛出的异常。
 */
@ControllerAdvice
public class GlobalExceptionHandler {
   //处理自定义的异常
   @ExceptionHandler(SystemException.class) 
   @ResponseBody
   public Object customHandler(SystemException e){
      e.printStackTrace();
      return WebResult.buildResult().status(e.getCode()).msg(e.getMessage());
   }
   //其他未处理的异常
   @ExceptionHandler(Exception.class)
   @ResponseBody
   public Object exceptionHandler(Exception e){
      e.printStackTrace();
      return WebResult.buildResult().status(Config.FAIL).msg("系统错误");
   }
}