@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;
}

}