@EXCEPTIONHANDLER注解使用和@ControllerAdvice

转载：https://blog.csdn.net/ChineseSoftware/article/details/118413266
https://www.freesion.com/article/1756683508/

@Controller
public class UserController {

@RequestMapping("/pagejump")
public String pageJump(){
String str=null;
str.length();
return "ok";
}

//该注解的作用是根据不同的异常跳转到不同的试图
@ExceptionHandler(value = {java.lang.NullPointerException.class})
public ModelAndView nullpointException(Exception e){
ModelAndView mv=new ModelAndView();
//将异常信息添加到ModelAndView中
mv.addObject("error1",e.toString());
//出现异常跳转到名为error1的视图
mv.setViewName("error1");
return mv;
}
}