springmvc+shiro自定义过滤器的实现代码

2019-11-26 09:34:05

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实现需求：

1.用户未登录，跳转到登录页，登录完成后会跳到初始访问页。

2.用户自定义处理（如需要激活），跳转到激活页面，激活完成后会跳到初始访问页。

使用到的框架

springmvc 的拦截器

shiro 自定义过滤器

实现：

1.编写拦截器通过session保存初始访问的页面地址，便于后面回跳这个页面做准备。

import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;/** * 用户登录以后跳转回之前页面的拦截器 拦截对象： 除登录，注册之外的所有跳转页面的请求 因为用户随时可能进行登录操作 * * @version 1.0.0 * @date 2018 -10-19 */public class ForwardBeforeUrlInteceptor implements HandlerInterceptor { private Logger logger = LoggerFactory.getLogger(this.getClass()); @Override public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)  throws Exception { } @Override public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)  throws Exception { } @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2) throws Exception { // 过滤掉ajax请求 if (request.getHeader("x-requested-with") != null  && request.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")) {  return true; } // 获取当前会话 HttpSession session = request.getSession(true); // 拿到上一个页面地址 String uri = request.getRequestURI(); // 去掉项目地址长度的字符（因为我的默认项目地址是给出的） String path = uri.substring(request.getContextPath().length()); // 得到参数 String query = request.getQueryString(); if (query == null) {  query = ""; } else {  query = "?" + query; } String beforePath = path + query; session.setAttribute("beforePath", beforePath); session.setAttribute("method", request.getMethod()); logger.debug("beforePath :{}, method:{}", beforePath, request.getMethod()); return true; }}

2.在spring的xml配置文件中配置拦截器，例如application.xml

 <mvc:interceptors>    <!-- 使用bean定义一个Interceptor，直接定义在mvc:interceptors根下面的Interceptor将拦截所有的请求 -->    <!-- 配置用于跳回登录之前的页面的拦截器-->    <mvc:interceptor>      <!-- 进行拦截：/**表示拦截所有url及其子路径 -->      <mvc:mapping path="/**" />      <!-- ajax请求的action不进行拦截 -->      <mvc:exclude-mapping path="/*.ajax" />      <mvc:exclude-mapping path="/resources/**" />      <mvc:exclude-mapping path="/activation" />      <bean class="com.xxx.xxx.xxx.interceptor.ForwardBeforeUrlInteceptor" />    </mvc:interceptor>  </mvc:interceptors>

注意：<mvc:exclude-mapping path="/activation" /> 此处是界面可以直接进入激活页面，此处是排除拦截激活页面，防止页面出现不停的回跳到自己页面。

3.自定义过滤器。

import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;/** * 课程拦截器,当会员过期或未激活时自动跳转到激活页面 *  * @version 1.0.0 * @date 2018 -10-19 */public class MemberFilter extends com.bwjf.framework.shiro.filter.UserFilter { @Override protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) { HttpServletResponse httpServletResponse = (HttpServletResponse) response; HttpServletRequest httpServletRequest = (HttpServletRequest) request; if (httpServletRequest.getRequestURI().indexOf("activation") > 0) {  return true; } MyShiroUser myShiroUser = MyUserUtil.getCurrentShiroUser(); if (!CheckEmptyUtil.isEmpty(myShiroUser) && CheckEmptyUtil.isEmpty(myShiroUser.getActiveDate())) {  try {      // 浏览器跳转到激活页面  httpServletResponse.sendRedirect(httpServletRequest.getContextPath() + "/activation");  } catch (IOException e) {  e.printStackTrace();  } } return true; }}

4.shiro.xml配置自定义过滤器