我要评论一、一般页面登录超时验证，可以用过滤器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。让其走到下个链或目标资源中
string url=request1.getservletpath();
system.out.println("demo1过滤前"+url);
myfunc myfunc = new myfunc(request1,response1);
system.out.println("demo1过滤前"+url.startswith("/index/"));
if(myfunc.checklogin2()&&!url.startswith("/index/")){
response1.sendredirect("/index_login.html");
}
system.out.println("demo1过滤后");
}
public void init(filterconfig arg0) throws servletexception {
// todo auto-generated method stub
system.out.println("===========init========过滤后");
}
}
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
提交页面,我的页面提示弹出框架用的asyncbox，可以改成其他的跳转
$.ajax({
type: "post",
url:"a.jsp",
async:false,//同步
data:{"name":"fdgh"}
success:function(msg){
//checklogin2(msg)判断是否登录超时，超时返回false，跳到登录页面
if(checklogin2(msg)){
var obj=eval('('+msg+')');
if(obj.result.indexof("suc")>-1){
alert("成功");
}else{
alert("失败");
}
}
});
//是否登录超时，超时返回false，跳到登录页面
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('登录超时，请重新登录', '提示', function(action){
top.location.href='/login.jsp';
});
}else{
asyncbox.alert('登录超时，请重新登录', '提示', function(action){
window.location.href='/login.jsp';
});
}
}
后台：
1.处理数据前
if(checklogin())return;
//检查登录，session过期，或者未登录，自动跳转
public boolean checklogin() throws ioexception{
boolean result = false;
string html = "";
nativeobject u = sessionmng.getcurrentuser(request);//检验是否登录超时
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、异步导入excel
用ajaxupload.js导入excel功能
前端提交页面参考上面的；
后台处理页面：
if(!islogin()){
response.getwriter().print("doctype");
return ;
}
//是否登录
public boolean islogin(){
nativeobject u = sessionmng.getcurrentuser(request);
if (u != null){
return true;
}else{
return false;
}
}
四。用window.open导出excel文件
后台同二
前端导出页面
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"%>
<%
//========================当前登陆用户信息========================================
if(checklogin())return;
%>
以上内容给大家介绍了登录超时给出提示跳到登录页面（ajax、导入、导出）的相关知识，希望对大家有所帮助！
您可能感兴趣的文章:
如您对本文有疑问或者有任何想说的，请 点击进行留言回复，万千网友为您解惑！
网友评论