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实现一个权限验证拦截器。

1、修改web.xml文件中请求路径

 2、将所有的页面放入WEB-INF目录下

 3、开发登录FirstController

4、开发拦截器

5、配置springmvc.xml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 https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"><!--2.配置视图解析器--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/jsp/" /><property name="suffix" value=".jsp" /></bean><!--3.开启注解驱动--><mvc:annotation-driven /><!--4.组件扫描器--><context:component-scan base-package="com.ambow.controller" /><!--配置拦截器--><mvc:interceptors><mvc:interceptor><mvc:mapping path="/**"/><mvc:exclude-mapping path="/login"/><bean class="com.ambow.LoginInterceptor" /></mvc:interceptor></mvc:interceptors>
</beans>

6、运行程序：