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本篇文章為大家展示了如何處理web登錄超時給出提示跳到登錄頁面的問題,內容簡明扼要并且容易理解,絕對能使你眼前一亮,通過這篇文章的詳細介紹希望你能有所收獲。
一、一般頁面登錄超時驗證,可以用過濾器filter,如下:
package com.lg.filter; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.lg.func.MyFunc; public class LoginFilter implements Filter{ public void destroy() { } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException, IOException { HttpServletRequest request1=(HttpServletRequest)request; HttpServletResponse response1=(HttpServletResponse)response; chain.doFilter(request, response);//放行。讓其走到下個鏈或目標資源中 String url=request1.getServletPath(); System.out.println("Demo1過濾前"+url); MyFunc myFunc = new MyFunc(request1,response1); System.out.println("Demo1過濾前"+url.startsWith("/index/")); if(myFunc.checkLogin2()&&!url.startsWith("/index/")){ response1.sendRedirect("/index_login.html"); } System.out.println("Demo1過濾后"); } public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub System.out.println("===========init========過濾后"); } }
web.xml配置
<filter> <filter-name>Demo1Filter</filter-name> <filter-class>com.lg.filter.LoginFilter</filter-class> </filter> <filter-mapping> <filter-name>Demo1Filter</filter-name> <url-pattern>*.jsp</url-pattern> </filter-mapping>
二、ajax提交
提交頁面,我的頁面提示彈出框架用的asyncBox,可以改成其他的跳轉
$.ajax({ type: "post", url:"a.jsp", async:false,//同步 data:{"name":"fdgh"} success:function(msg){ //checkLogin2(msg)判斷是否登錄超時,超時返回false,跳到登錄頁面 if(checkLogin2(msg)){ var obj=eval('('+msg+')'); if(obj.result.indexOf("suc")>-1){ alert("成功"); }else{ alert("失敗"); } } }); //是否登錄超時,超時返回false,跳到登錄頁面 function checkLogin2(msg){ if(msg!=null&&msg.length>0){ if(msg.indexOf("DOCTYPE")>-1){ checkLogin(); return false; } } return true; } function checkLogin(){ if(window.top != window.self){ top.asyncbox.alert('登錄超時,請重新登錄', '提示', function(action){ top.location.href='/login.jsp'; }); }else{ asyncbox.alert('登錄超時,請重新登錄', '提示', function(action){ window.location.href='/login.jsp'; }); } }
后臺:
1.處理數據前
if(checkLogin())return; //檢查登錄,session過期,或者未登錄,自動跳轉 public boolean checkLogin() throws IOException{ boolean result = false; String html = ""; NativeObject u = SessionMng.getCurrentUser(request);//檢驗是否登錄超時 if (u == null){ html = "<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Transitional//EN' 'http://www.w3.org/TR/html4/loose.dtd'>\n" + "<script type='text/javascript' src='/admin/js/jquery.min.js'></script>\n" + "<script type='text/javascript' src='/admin/js/common.js'></script>\n" + "<script type='text/javascript' src='/admin/js/dialog/asyncbox.js'></script>\n" + "<script language=javascript>checkLogin();</script>\n"; response.getWriter().println(html); result = true; } return result; }
三、異步導入excel
用AjaxUpload.js導入excel功能
前端提交頁面參考上面的;
后臺處理頁面:
if(!isLogin()){ response.getWriter().print("DOCTYPE"); return ; } //是否登錄 public boolean isLogin(){ NativeObject u = SessionMng.getCurrentUser(request); if (u != null){ return true; }else{ return false; } }
四。用window.open導出excel文件
后臺同二
前端導出頁面
function export_excel(){ $.ajax({ type: "post", url:"/admin/inc/checkLogin.jsp", async:false,//同步 success:function(msg){ if(checkLogin2(msg)){ window.open("perfm_excel.jsp?"+$('#Form1').serialize()); } } }); login.jsp <%@ page contentType="text/html; charset=utf-8"%> <% //========================當前登陸用戶信息======================================== if(checkLogin())return; %>
上述內容就是如何處理web登錄超時給出提示跳到登錄頁面的問題,你們學到知識或技能了嗎?如果還想學到更多技能或者豐富自己的知識儲備,歡迎關注億速云行業資訊頻道。
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