Login timeout gives tips for jumping to the login page (Ajax, import, export) _ajax related

One or one-page logon timeout verification, filter filter can be used, as follows:

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, Servlet Response Response, Filterchain chain) throws Servletexception, IOException {httpservletrequest request1= (
HttpServletRequest) Request;
HttpServletResponse response1= (httpservletresponse) response; Chain.dofilter (request, response);/release.
Let it go to the next chain or target resource String url=request1.getservletpath ();
System.out.println ("Demo1 filter Before" +url);
MyFunc MyFunc = new MyFunc (REQUEST1,RESPONSE1);
System.out.println ("Demo1 filter Before" +url.startswith ("/index/")); if (Myfunc.checklogin2 () &&!url.startswith ("/index/")) {RESPOnse1.sendredirect ("/index_login.html");
} System.out.println ("Demo1 filtered"); public void init (Filterconfig arg0) throws Servletexception {//TODO auto-generated Method Stub System.out.println ("= =
========init======== after filtration "); }
}

Web.xml Configuration

<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>

Second, the AJAX submission

Submit the page, my page prompts pop-up frame with the Asyncbox, can be changed to other jumps

$.ajax ({
type: "Post",
URL: "a.jsp",
async:false,//sync
data:{"name": "Fdgh"}
success:function ( msg) {
//checklogin2 (msg) determines whether a login timeout, returns false, jumps to the login page
if (checkLogin2 (msg)) {
var obj=eval (' (' +msg+ ') ');
if (Obj.result.indexOf ("suc") >-1) {
alert ("Success");
} else{
alert ("Failed");}}
);
Login timeout, timeout return false, skip to login page
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 (' Login timeout, login again ', ' Prompt ', function ( Action) { 
top.location.href= '/login.jsp ';
}); 
else{
asyncbox.alert (' login timeout, please login ', ' Prompt ', function (action) {
window.location.href= '/login.jsp ';
} 
}
}

Background:

1. Before processing data

if (Checklogin ()) return; 
Check login, session expired, or not logged in, automatic jump public
Boolean Checklogin () throws ioexception{
Boolean result = false;
String html = "";
NativeObject u = sessionmng.getcurrentuser (Request)//Verify login timeout
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= ' 
Js/dialog/asyncbox.js ' ></script>\n "+ 
" <script language=javascript>checklogin (); </script >\n ";
Response.getwriter (). println (HTML); 
result = true;
}
return result;
}

Three, import Excel asynchronously

Import Excel features with Ajaxupload.js

Front-End submission page reference above;

Background processing page:

if (!islogin ()) {
response.getwriter (). Print ("DOCTYPE");
return;
}
Log on to Public
Boolean islogin () {
nativeobject u = sessionmng.getcurrentuser (request);
if (U!= null) {return
true;
} else{return
false;
}

Four. Exporting Excel files with window.open

Backstage with two

Front End Export Page

function Export_excel () { 
$.ajax ({
type: Post),
URL: "/admin/inc/checklogin.jsp",
async:false ,//Synchronous
success:function (msg) {
if (checkLogin2 (msg)) {
window.open ("perfm_excel.jsp?"). +$ (' #Form1 '). Serialize ()); 
login.jsp
<%@ page contenttype= "text/html charset=utf-8"%> <%
Current login user Information ========================================
if (Checklogin ()) return;

The above content to introduce you to the login timeout to jump to the login page (Ajax, import, export) related knowledge, I hope to help you!