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springboot里处理异常有五种方式，看第2、3种：

2、注解@ExceptionHander

@ExceptionHandler(value = {java.lang.NullPointerException.class})
public ModelAndView testExceptionHander(Exception e){ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("exception",e);modelAndView.setViewName("error");return modelAndView;
}

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@ExceptionHandler(value = {java.lang.ArithmeticException.class})
public ModelAndView testExceptionHander1(Exception e){ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("exception",e);modelAndView.setViewName("error");return modelAndView;
}

3、注解@ControllerAdvice

@ControllerAdvice
public class ErrorController {@ExceptionHandler(value = {java.lang.NullPointerException.class})public ModelAndView testExceptionHander(Exception e){ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("exception",e);modelAndView.setViewName("error");return modelAndView;}
@ControllerAdvice
public class ErrorController {@ExceptionHandler(value = {java.lang.NullPointerException.class})public ModelAndView testExceptionHander(Exception e){ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("exception",e);modelAndView.setViewName("error");return modelAndView;}

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    @ExceptionHandler(value = {java.lang.ArithmeticException.class})public ModelAndView testExceptionHander1(Exception e){ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("exception",e);modelAndView.setViewName("error");return modelAndView;}
}