系统异常处理器 SimpleMappingExceptionResolver
案例：一个处理器方法中出项异常，想让他跳转到一个自定义的错误页面
package demo12Exception; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; /** * Created by mycom on 2018/3/28. */ @Controller public class SysExceptionController { @RequestMapping("/first") public String doFour(Model model){ int num=5/0; return "success"; } }
在配置文件中需要一个异常处理器
<?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"> <context:component-scan base-package="demo12Exception"></context:component-scan> <!--视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean> <!--异常处理器--> <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <property name="defaultErrorView" value="error"></property> <property name="exceptionAttribute" value="ex"></property> </bean> <!--注解驱动--><!--<mvc:annotation-driven/>--> </beans>
错误页面
<%-- Created by IntelliJ IDEA. User: mycom Date: 2018/3/26 Time: 11:57 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>Title</title> </head> <body> <h2>出错了！！！！</h2> ${ex.message} </body> </html>