1.在项目的web.xml文件中添加如下代码：
|
1
2
3
4
|
<!--添加Session监听器--><listener><listener-class> 监听器路径 </listener-class></listener> |
2.编写java类。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
public class SessionListener implements HttpSessionListener {public void sessionCreated(HttpSessionEvent arg0) {// session创建时执行SimpleDateFormat simpleFormat = new SimpleDateFormat("mm-ss-ms");String nowtimes = simpleFormat.format(new Date());User u=null;//System.out.println("执行。。 当前时间："+nowtimes+"_"+u);HttpSession ses= arg0.getSession();String id=ses.getId()+"_"+ses.getCreationTime();}public void sessionDestroyed(HttpSessionEvent arg0) {// session失效时执行SimpleDateFormat simpleFormat = new SimpleDateFormat("mm-ss-ms");String nowtimes = simpleFormat.format(new Date()); //System.out.println("session失效了。。 结束时间： "+nowtimes);}} |
配置完成后等session失效后成功进入sessionDestroyed方法，准备进行页面跳转操作，突然发现怎么写跳转，愣住了，继续上网请教大神，发现这个监听是做一些后台统计处理的，无法实现页面跳转的功能。
只能放弃这方法了，开始使用过滤器实现
1、web.xml中添加过滤器配置
|
1
2
3
4
5
6
7
8
|
<filter><filter-name>sessionFilter</filter-name><filter-class>com.orchestrall.web.helper.session.SessionFilter</filter-class></filter><filter-mapping><filter-name>sessionFilter</filter-name><url-pattern>/actions/*</url-pattern></filter-mapping> |
2、新建SessionFilter类，实现Filter接口。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
public class SessionFilterimplements Filter {public void destroy() {// TODO Auto-generated method stub}public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {HttpServletRequest httpRequest = (HttpServletRequest) request;HttpServletResponse httpResponse = (HttpServletResponse) response;HttpSession session = httpRequest.getSession();// 登陆urlString loginUrl = httpRequest.getContextPath() + "/admin/login.jsp";String url = httpRequest.getRequestURI();String path = url.substring(url.lastIndexOf("/"));// 超时处理，ajax请求超时设置超时状态，页面请求超时则返回提示并重定向if (path.indexOf(".action") != -1&& session.getAttribute("LOGIN_SUCCESS") == null) {// 判断是否为ajax请求if (httpRequest.getHeader("x-requested-with") != null&& httpRequest.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")) {httpResponse.addHeader("sessionstatus", "timeOut");httpResponse.addHeader("loginPath", loginUrl);chain.doFilter(request, response);// 不可少，否则请求会出错} else {String str = "<script language='javascript'>alert('会话过期,请重新登录');"+ "window.top.location.href='"+ loginUrl+ "';</script>";response.setContentType("text/html;charset=UTF-8");// 解决中文乱码try {PrintWriter writer = response.getWriter();writer.write(str);writer.flush();writer.close();} catch (Exception e) {e.printStackTrace();}}} else {chain.doFilter(request, response);}}@Overridepublic void init(FilterConfig arg0) throws ServletException {// TODO Auto-generated method stub}} |
3、客户端JS，用于ajax请求session超时
对于jquery
|
1
2
3
4
5
6
7
8
9
10
11
12
|
<script type="text/javascript">$(document).ajaxComplete(function(event, xhr, settings) { if(xhr.getResponseHeader("sessionstatus")=="timeOut"){ if(xhr.getResponseHeader("loginPath")){alert("会话过期，请重新登陆!");window.location.replace(xhr.getResponseHeader("loginPath")); }else{ alert("请求超时请重新登陆 !"); } } }); </script> |
对于extjs的ajax请求
|
1
2
3
4
5
6
7
8
9
10
11
|
Ext.Ajax.on('requestcomplete',checkUserSessionStatus, this);function checkUserSessionStatus(conn,response,options){if(response.getResponseHeader("sessionstatus") == 'timeout'){if(response.getResponseHeader("loginPath")){alert("会话过期，请重新登陆!");window.top.location.href = response.getResponseHeader("loginPath");}else{alert("请求超时请重新登陆 !");}}} |
如果使某个ajax请求不受全局方法的影响，那么可以在使用$.ajax()方法时，将参数中的global设置为false，jquery代码如下：
|
1
2
3
4
|
$.ajax({url:"test.html",global:false//不触发全局ajax事件}) |