SSM 框架拦截器：实现用户验证

来源：互联网发布：不是我不爱你网络歌手编辑：程序博客网时间：2024/06/14 12:38

这里写一个 SSM 框架拦截器实现用户验证的例子

废话不多说，直接看代码。首先，配置拦截器，springMVC.xml如下：

<?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:aop="http://www.springframework.org/schema/aop"    xmlns:p="http://www.springframework.org/schema/p"    xmlns:mvc="http://www.springframework.org/schema/mvc"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:tx="http://www.springframework.org/schema/tx"    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">    <!--  配置用注解的方式实现处理器 -->    <context:component-scan base-package="com.user.*"></context:component-scan>    <!-- 配置视图解析器 -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean>    <!-- 配置拦截器 -->    <mvc:interceptors>        <mvc:interceptor>            <mvc:mapping path="/**"/>            <bean class="com.movesys.interceptor.TimeInterceptor"></bean>        </mvc:interceptor>    </mvc:interceptors></beans>

拦截器代码LoginInterceptor.java如下：

package com.user.interceptor;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import com.user.bean.User;/** * 登陆验证 * @author LIU * @version 1.0 2017-10-31 */public class LoginInterceptor implements HandlerInterceptor {    @Override    public void afterCompletion(HttpServletRequest arg0,            HttpServletResponse arg1, Object arg2, Exception arg3)            throws Exception {        // TODO Auto-generated method stub    }    @Override    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,            Object arg2, ModelAndView arg3) throws Exception {        // TODO Auto-generated method stub    }    /**     * Handler执行之前调用这个方法      */    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,            Object arg2) throws Exception {        // TODO Auto-generated method stub         //获取请求的URL          String url = request.getRequestURI();          //URL:login.jsp是公开的;这个demo是除了login.jsp是可以公开访问的，其它的URL都进行拦截控制          if(url.indexOf("login.action")>=0){              return true;          }          //获取Session          HttpSession session = request.getSession();          User currUser = (User)session.getAttribute("currUser");          if(currUser != null){              return true;          }          //不符合条件的，跳转到登录界面          request.getRequestDispatcher("login.jsp").forward(request, response);          return false;    }}

阅读全文

0 0