一、概述 

承接上文

SimpleMappingExceptionResolver的作用：对所有的异常进行统一处理，他将异常类名映射为视图名，即发生异常时，使用对应的视图显示异常；

承接上文：

SimpleMappingExceptionResolver的配置,举例说明：

针对Java.lang.ArrayIndexOutOfBoundsException该异常配置的错误,如果页面跳转到了该页面，那么就会跳转到 视图解析器前缀+myerror+视图解析器后缀

如果报其他错误，则默认跳转到 视图解析器前缀+error+视图解析器后缀

获取异常信息，默认参数为exception,如果配置了exceptionAttribute，如下 value值为 ex,那么页面去${ex}即可；

 1 
 2     <bean
 3         class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
 4         
 5         <property name="defaultErrorView" value="error">property>
 6         
 7         <property name="exceptionAttribute" value="ex">property>
 8         
 9         <property name="exceptionMappings">
10             <props>
11                 <prop key="java.lang.ArrayIndexOutOfBoundsException">myerrorprop>
12                 
13             props>
14         property>
15     bean>

二、实例验证：

目录结果：

配置：

web.xml配置：只配置了DispatcherServlet

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3     xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 4     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
 5     id="WebApp_ID" version="3.1">
 6     <servlet>
 7         <servlet-name>springDispatcherServletservlet-name>
 8         <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
 9         
10         
12         <init-param>
13             <param-name>contextConfigLocationparam-name>
14             <param-value>classpath:spring.xmlparam-value>
15         init-param>
16         
17         <load-on-startup>1load-on-startup>
18     servlet>
19 
20     
21     <servlet-mapping>
22         <servlet-name>springDispatcherServletservlet-name>
23         <url-pattern>/url-pattern>
24     servlet-mapping>
25 web-app>

spring.xmp配置：基础配置+SimpleMappingExceptionResolver配置

基础配置包括：包扫描的配置、视图解析器配置、<mvc:annotation-driven>mvc:annotation-driven>；

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:mvc="http://www.springframework.org/schema/mvc"
 5     xmlns:context="http://www.springframework.org/schema/context"
 6     xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
 7         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 8         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
 9 
10     <context:component-scan base-package="handler">context:component-scan>
11     
12     <bean
13         class="org.springframework.web.servlet.view.InternalResourceViewResolver">
14         <property name="prefix" value="/WEB-INF/views/">property>
15         <property name="suffix" value=".jsp">property>
16     bean>
17 
18     <mvc:annotation-driven>mvc:annotation-driven>
19     
20     <bean
21         class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
22         
23         <property name="defaultErrorView" value="error">property>
24         
25         <property name="exceptionAttribute" value="ex">property>
26         
27         <property name="exceptionMappings">
28             <props>
29                 <prop key="java.lang.ArrayIndexOutOfBoundsException">myerrorprop>
30                 
31             props>
32         property>
33     bean>
34 beans>

EceptionController.java

 1 package handler;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.bind.annotation.RequestParam;
 6 
 7 @RequestMapping("/emp")
 8 @Controller
 9 public class EceptionController {
10 
11     @RequestMapping("/testSimpleMappingExceptionResolver")
12     public String testSimpleMappingExceptionResolver(@RequestParam("i") int i) {
13         String[] arr = new String[9];
14         System.out.println(arr[i]);
15         System.out.println("testSimpleMappingExceptionResolver");
16         return "success";
17     }
18 
19     @RequestMapping("/testError")
20     public String testError(@RequestParam("i") int i) {
21         System.out.println(10 / i);
22         return "success";
23     }
24 }

错误页面：

error.jsp;

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 DOCTYPE html>
 4 <html>
 5 <head>
 6 <meta charset="UTF-8">
 7 <title>Insert title heretitle>
 8 head>
 9 <body>
10 <h4>Error Pageh4>
11 ${ex}
12 body>
13 html>

myerror.jsp

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 DOCTYPE html>
 4 <html>
 5 <head>
 6 <meta charset="UTF-8">
 7 <title>Insert title heretitle>
 8 head>
 9 <body>
10 <h4>Error Page MY ERRORh4>
11 ${ex}
12 body>
13 html>

运行结果：

访问：http://localhost:8080/DataOperate/emp/testError?i=0，跳转到默认的error.jsp页面，并显示异常信息，如下图所示：

访问：http://localhost:8080/DataOperate/emp/testSimpleMappingExceptionResolver?i=13，跳转到配置的特定的错误页面myerror.jsp，并且显示异常信息，如下图所示

注意：

• 如果把spring.xml中配置的 去掉，则两个错误页面获取异常信息的值需要修改为exception;
• 配置的错误页面，经过视图解析器，也就是说， 视图解析器前缀+myerror+视图解析器后缀