您现在的位置是：首页 > 文章详情

SSM-SpringMVC-26：SpringMVC异常骇级之自定义异常注解版

日期：2018-03-30点击：355收藏

------------吾亦无他,唯手熟尔，谦卑若愚，好学若饥-------------

注解的方法实现异常解析，话不多说，直接搞起，和以前一样的习惯，和上篇博客一样的代码放后面，不一样的在前面

案例：

1.自定义处理器和处理方法

package cn.dawn.day18annotationexception; import cn.dawn.day18annotationexception.userexception.UserageException; import cn.dawn.day18annotationexception.userexception.UsernameException; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * Created by Dawn on 2018/3/28. */ @Controller public class ZDYExceptionController { /*作用于这俩个*/ @ExceptionHandler({UsernameException.class,UserageException.class}) public ModelAndView resolveException(Exception ex) { ModelAndView modelAndView=new ModelAndView(); /*返回的异常对象*/ modelAndView.addObject("ex",ex); /*判断去那个页面*/ if(ex instanceof UsernameException){ modelAndView.setViewName("name"); } if(ex instanceof UserageException){ modelAndView.setViewName("age"); } return modelAndView; } @RequestMapping("/annotationException") public String annotationException(String username,Integer userage) throws Exception { if(!username.equals("admin")){ throw new UsernameException("登陆名不正确"); } if(userage<18){ throw new UserageException("未成年，走开"); } return "success"; } }

2.自己的xml大配置文件

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!--包扫描器--> <context:component-scan base-package="cn.dawn.day18annotationexception"></context:component-scan> <!--视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/day18/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>

3.修改web.xml的中央调度器的上下文配置路径

4.login.jsp

<%@ page pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>Title</title> </head> <body> <h2>登录</h2> <form action="${pageContext.request.contextPath}/annotationException" method="post"> 用户名:<input name="username"> 年龄:<input name="userage"> <input type="submit" value="登录"/> </form> </body> </html>

下面的内容与上篇博客相同

5.UserageException自定义异常

package cn.dawn.day17selfexceptionresolver.userexception; /** * Created by Dawn on 2018/3/30. */ public class UserageException extends Exception { public UserageException() { super(); } public UserageException(String message) { super(message); } }

6.UsernameException自定义异常

package cn.dawn.day17selfexceptionresolver.userexception; /** * Created by Dawn on 2018/3/30. */ public class UsernameException extends Exception { public UsernameException() { super(); } public UsernameException(String message) { super(message); } }

7.jsp页面

7.1success.jsp

<%@ page language="java" pageEncoding="utf-8" isELIgnored="false" %> <html> <body> <%--<img src="image/1.jpg">--%> <h2>Success!</h2> </body> </html>

7.2error.jsp

<%@ page pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>Title</title> </head> <body> <h2>ERROR</h2> <p>${ex.message}</p> 服务器被猴子砍了，攻城狮在抢修中，还杀了个程序猿祭天 </body> </html>

7.3age.jsp

<%@ page pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>Title</title> </head> <body> <h2>年龄错误ERROR</h2> <p>${ex.message}</p> 服务器被猴子砍了，攻城狮在抢修中，还杀了个程序猿祭天 </body> </html>

7.4name.jsp

<%@ page pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>Title</title> </head> <body> <h2>名字错误ERROR</h2> <p>${ex.message}</p> 服务器被猴子砍了，攻城狮在抢修中，还杀了个程序猿祭天 </body> </html>

8.启动tomcat，访问login.jsp

原文链接：https://yq.aliyun.com/articles/619633

关注公众号

低调大师中文资讯倾力打造互联网数据资讯、行业资源、电子商务、移动互联网、网络营销平台。

持续更新报道IT业界、互联网、市场资讯、驱动更新,是最及时权威的产业资讯及硬件资讯报道平台。

转载内容版权归作者及来源网站所有，本站原创内容转载请注明来源。