SpringMVC异常处理

@ControllerAdvice
没有切点只有增强

1.全局统一异常处理类

 1 package com.cn.globalexpction;
 2 
 3 import org.springframework.ui.ModelMap;
 4 import org.springframework.web.bind.annotation.ControllerAdvice;
 5 import org.springframework.web.bind.annotation.ExceptionHandler;
 6 import org.springframework.web.servlet.ModelAndView;
 7 
 8 /**
 9  * @Author hxy
10  * @Description 全局统一异常处理类
11  * @Date 2023/9/15 10:11
12  * @Version 1.0
13  */
14 @ControllerAdvice//声明页面控制器增强类(处理Controller的所有异常)
15 public class GlobalExceptionHandle {
16     //@ExceptionHandler:声明该方法可以处理的异常类型
17     @ExceptionHandler({NameException.class})
18     public ModelAndView doNameException(Exception e){
19         System.out.println("-------doNameException--------");
20         ModelAndView modelAndView = new ModelAndView();
21         modelAndView.addObject("msg","用戶名错误异常");
22         modelAndView.addObject("e",e);
23         modelAndView.setViewName("error");
24         e.printStackTrace();
25         return modelAndView;
26     }
27 
28     @ExceptionHandler({PasswordException.class})
29     public ModelAndView doPasswordException(Exception e){
30         System.out.println("-------doPasswordException--------");
31         ModelAndView modelAndView = new ModelAndView();
32         modelAndView.addObject("msg","密码错误异常");
33         modelAndView.addObject("e",e);
34         modelAndView.setViewName("error");
35         e.printStackTrace();
36         return modelAndView;
37     }
38 
39     /**此方法用来处理任意异常（也就是上面两个方法不能处理的其他异常）
40      * @return {@link ModelAndView}
41      */
42     @ExceptionHandler
43     public ModelAndView doException(Exception e){
44         System.out.println("-----------doException----------");
45         ModelAndView modelAndView = new ModelAndView();
46         modelAndView.addObject("msg","系统异常");
47         modelAndView.addObject("e",e);
48         modelAndView.setViewName("error");
49         e.printStackTrace();
50         return modelAndView;
51     }
52 }

2.异常页面控制器

 1 package com.cn.globalexpction;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.ui.ModelMap;
 5 import org.springframework.web.bind.annotation.RequestMapping;
 6 
 7 /**
 8  * @Author hxy
 9  * @Description 异常页面控制器
10  * @Date 2023/9/15 9:42
11  * @Version 1.0
12  */
13 @Controller
14 public class ExceptionController {
15     @RequestMapping("/exception.do")
16     public String exception(String name, String password, ModelMap modelMap)throws Exception{
17         //用户名判断
18         if (!"binge".equals(name)){
19             //抛出用户名错误异常
20             throw new NameException("用户名错误异常");
21         }
22         if (!"666".equals(password)){
23             //抛出密码错误异常
24             throw new PasswordException("密码错误异常");
25         }
26 //        int i=1/0;
27         modelMap.addAttribute("msg","用户名和密码正确");
28         return "result";
29     }
30 }

3.自定义异常

 1 package com.cn.globalexpction;
 2 
 3 /**
 4  * @Author hxy
 5  * @Description 自定义用户名异常
 6  * @Date 2023/9/15 9:46
 7  * @Version 1.0
 8  */
 9 public class NameException extends Exception{
10     public NameException(String message){
11         super(message);
12     }
13 }

 1 package com.cn.globalexpction;
 2 
 3 /**
 4  * @Author hxy
 5  * @Description 自定义密码错误异常
 6  * @Date 2023/9/15 9:48
 7  * @Version 1.0
 8  */
 9 public class PasswordException extends Exception{
10     public PasswordException(String message){
11         super(message);
12     }
13 }