本文實例講述了java自定義攔截器及其用法。分享給大家供大家參考。具體如下：
LoginInterceptor.java文件如下：
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package com.tq365.util;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.AbstractInterceptor;import com.tq365.vo.User;/** * 自定義的攔截器（放行登錄操作和已經登錄用戶的操作） * @author archie2010 * */public class LoginInterceptor extends AbstractInterceptor{ private static final long serialVersionUID = 1406123004582563032L; @Override public String intercept(ActionInvocation invocation) throws Exception { HttpServletRequest request = ServletActionContext.getRequest(); HttpSession session = ServletActionContext.getRequest().getSession(); User user = (User)session.getAttribute("USER"); // 請求的url String path = request.getServletPath(); boolean flag = false; if("/loginuser.jspx".equals(path)){ flag = true; }else{ if(user!=null){ flag = true; } } System.out.println(path); return flag ? invocation.invoke() : "error"; }} |
struts.xml文件如下：
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<interceptors> <!-- login攔截器 --> <interceptor name="login" class="com.tq365.util.LongInterceptor"/> <interceptor-stack name="myInterceptor"> <interceptor-ref name="login"/> <interceptor-ref name="paramsPrepareParamsStack"/> </interceptor-stack></interceptors><default-interceptor-ref name="myInterceptor"/> |
希望本文所述對大家的java程序設計有所幫助。
