Spring MVC学习06--异常解析器

自定义Exception类：

1 package com.yas.ex;
2 
3 public class MyException1 extends Exception {
4     public MyException1(String msg){
5         super(msg);
6     }
7 }

1 package com.yas.ex;
2 
3 public class MyException2 extends Exception{
4     public MyException2(String msg){
5         super(msg);
6     }
7 }

1 package com.yas.ex;
2 
3 public class MyException3 extends Exception{
4     public MyException3(String msg){
5         super(msg);
6     }
7 }

定义异常解析器：

 1 package com.yas.resolver;
 2 
 3 import com.yas.ex.MyException1;
 4 import com.yas.ex.MyException2;
 5 import com.yas.ex.MyException3;
 6 import org.springframework.web.servlet.HandlerExceptionResolver;
 7 import org.springframework.web.servlet.ModelAndView;
 8 
 9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11 
12 //异常解析器
13 //任何一个hanlder中抛出异常时
14 public class MyExeceptionResolver implements HandlerExceptionResolver {
15     @Override
16     public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
17         ModelAndView modelAndView = new ModelAndView();
18         if(e instanceof MyException1){
19             modelAndView.setViewName("error1");
20         }else if(e instanceof MyException2){
21             modelAndView.setViewName("error2");
22         }else if (e instanceof MyException3){
23             modelAndView.setViewName("error3");
24         }
25         return modelAndView;
26     }
27 }

在mvc.xml文件中进行注册：

<bean class="com.yas.resolver.MyExeceptionResolver"></bean>

定义用于跳转的Controller类：

 1 package com.yas.controller;
 2 
 3 import com.yas.ex.MyException1;
 4 import com.yas.ex.MyException2;
 5 import com.yas.ex.MyException3;
 6 import org.springframework.stereotype.Controller;
 7 import org.springframework.web.bind.annotation.RequestMapping;
 8 import org.springframework.web.bind.annotation.RequestParam;
 9 import org.springframework.web.bind.annotation.ResponseBody;
10 
11 @Controller
12 public class ExceptionController {
13 
14     @RequestMapping("/error1")
15     public String exception1(){
16         return "error1";
17     }
18 
19     @RequestMapping("/error2")
20     public String exception2(){
21         return "error2";
22     }
23 
24     @RequestMapping("/error3")
25     public String exception3(){
26         return "error3";
27     }
28 
29     @RequestMapping("/ex/test1")
30     public String test1(@RequestParam("id") Integer id) throws Exception {
31         if(id==1){
32             throw new MyException1("异常1");
33         }else if(id==2){
34             throw new MyException2("异常2");
35         }else if(id==3){
36             throw new MyException3("异常3");
37         }
38         return "success";
39     }
40 }

新建异常跳转的页面：

error1.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
error1
</body>
</html>

error2.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
error2
</body>
</html>

error3.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
error3
</body>
</html>

posted on 2021-10-26 18:35 Sempron2800+ 阅读(25) 评论(0) 编辑收藏举报