1.权限拦截器
package login; import javax.servlet.http.HttpServletResponse; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionInvocation; import com.opensymphony.xwork2.interceptor.AbstractInterceptor; public class LoginInterceptor extends AbstractInterceptor { private static final long serialVersionUID = 1L; @Override public String intercept(ActionInvocation ai) throws Exception { //取得请求的URL String url = ServletActionContext.getRequest().getRequestURL().toString(); HttpServletResponse response=ServletActionContext.getResponse(); response.setHeader("Pragma","No-cache"); response.setHeader("Cache-Control","no-cache"); response.setHeader("Cache-Control", "no-store"); response.setDateHeader("Expires",0); System.out.println("execute LoginInterceptor"); //对登录与注销请求直接放行,不予拦截 if (url.indexOf("login.action")!=-1 || url.indexOf("logout.action")!=-1) { return ai.invoke(); } else { //验证Session是否过期 if(!ServletActionContext.getRequest().isRequestedSessionIdValid()) { //session过期,转向session过期提示页,最终跳转至登录页面 return "tologin"; } else { String systemUser =(String) ServletActionContext.getRequest().getSession().getAttribute("user"); //验证是否已经登录 if (systemUser==null) { //尚未登录,跳转至登录页面 return "tologin"; } else { return ai.invoke(); } } } } }
2.日志拦截器
import java.text.SimpleDateFormat; import java.util.Date; import java.util.Map; import java.util.Set; import com.opensymphony.xwork2.ActionInvocation; import com.opensymphony.xwork2.interceptor.Interceptor; import com.opensymphony.xwork2.interceptor.PreResultListener; public class DologInterceptor implements Interceptor { private static final long serialVersionUID = 1L; @Override public void destroy() { // TODO Auto-generated method stub } @Override public void init() { // TODO Auto-generated method stub } LogDao ld=new LogDao(); @Override public String intercept(ActionInvocation ai) throws Exception { ai.addPreResultListener(new PreResultListener() { public void beforeResult(ActionInvocation ai, String arg1) { try { boolean param=true; System.out.println("execute DologIntercepter"); OperateLog log=new OperateLog(); long time=System.currentTimeMillis(); log.setId(time); SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd H:m:s"); String operatetime=format.format(new Date()).toString(); log.setOperatetime(operatetime); Map<String, Object> session = ai.getInvocationContext().getSession(); String user = (String) session.get("user"); if (user != null) { log.setOperator(user); } else { log.setOperator("operator：can't get form system"); } String operation="className:" + ai.getAction() + " "; operation=operation+"methodName:" + ai.getInvocationContext().getName()+ " "; Map<String, Object> map = ai.getInvocationContext().getParameters(); Set<String> keys = map.keySet(); if (keys==null||keys.size()==0) { param=false; System.out.println("parameters null"); } else { operation=operation+"Parameters:"; for (String key : keys) { operation=operation+key + "=" + ((Object[]) map.get(key))[0]+ "#"; } } operation=operation+" executeResult:" + ai.getResultCode() + " "; log.setOperation(operation); if (param) { ld.save(log); System.out.println("print the log object:"+log); } } catch (Exception e) { e.printStackTrace(); } } }); return ai.invoke(); } }
3.execAndWait为struts2自带拦截器，这里不附源代码
前台与execAndWait配合的页面代码：
重点是： <meta http-equiv="refresh" content="3;url=generatePath.action">
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>My JSP 'indicate_waiting.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- 下面的meta元素才是重点，其他的没什么影响，是IDE自带的 --> <meta http-equiv="refresh" content="3;url=generatePath.action"> <title> 正在查询，请稍等...</title> <style type="text/css"> .query_hint{ border:5px solid #939393; 400px; height:50px; line-height:55px; padding:0 20px; position:absolute; left:40%; margin-left:-140px; top:30%; margin-top:-40px; font-size:15px; color:#333; font-weight:bold; text-align:center; background-color:#f9f9f9; } .query_hint img{position:relative;top:10px;left:-8px;} </style> </head> <body> <div id="query_hint" class="query_hint"> <img src="images/waiting.gif" />正在执行查询，请稍等...<%-- <s:property value="complete"/> --%> </div> </html>
4.在struts.xml中对拦截器的配置
<package name="generatepath" namespace="/" extends="struts-default"> <interceptors> <!-- 定义权限控制拦截器 --> <interceptor name="loginVerify" class="login.LoginInterceptor"></interceptor> <!-- 定义日志拦截器 --> <interceptor name="dolog" class="dolog.DologInterceptor"></interceptor> <!-- 定义一个包含登陆控制和日志管理的拦截器栈 --> <interceptor-stack name="mydefaultStack"> <interceptor-ref name="loginVerify"></interceptor-ref> <interceptor-ref name="dolog"></interceptor-ref> <interceptor-ref name="defaultStack"></interceptor-ref> <interceptor-ref name="execAndWait"> <param name="delay">1000</param> <param name="delaySleepInterval">1000</param> </interceptor-ref> </interceptor-stack> </interceptors> <!-- 定义默认拦截器 --> <default-interceptor-ref name="mydefaultStack"></default-interceptor-ref> <!-- 定义全局处理结果 --> <global-results> <result name="tologin" type="redirect">/session.jsp</result> </global-results> <action name="generatePath" class="neo4j.PathIndicationAction" method="doIndicatePath"> <result name="wait">/work/search/indicate_waiting.jsp</result> <result name="indicateResult">/work/search/pathIndication.jsp</result> </action> </package>