統計在線用戶並進行監控

一、在線用戶數據表

create table CRM_SESSION ( USERID NUMBER, USERNAME VARCHAR2(50), SESSIONIDS VARCHAR2(50), USERSTATE VARCHAR2(50), CALLSTATE VARCHAR2(50) ); alter table CRM_SESSION add constraint AK_KEY_1_CRM_SESS unique (USERID) 

二、當用戶登錄時

將用戶的數據放入數據庫中（代碼略）

因爲在sessionCreated()方法中,取出的用戶信息爲空，直接在這一步中直接將用戶保存到數據庫中。

三、當用戶登出時，

1，在action中調用

getSession().invalidate();

2，session監聽就會啓動。

在sessionDestroyed()方法中，他會刪除用戶的信息。

例如：

package cn.com.xinli.crm.core; import javax.servlet.http.HttpSession; import javax.servlet.http.HttpSessionEvent; import javax.servlet.http.HttpSessionListener; import org.springframework.web.context.WebApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; import cn.com.xinli.crm.ibatis.commquery.SessionID; import cn.com.xinli.crm.ibatis.sysmanage.SysUser; import cn.com.xinli.crm.service.commquery.ISessionIDService; public class UserOnline implements HttpSessionListener { public void sessionCreated(HttpSessionEvent event) { } public void sessionDestroyed(HttpSessionEvent event) { try { HttpSession session = event.getSession(); SysUser user = (SysUser) session.getAttribute("sessionUser"); WebApplicationContext ctx = WebApplicationContextUtils .getRequiredWebApplicationContext(session .getServletContext()); ISessionIDService sesService = (ISessionIDService) ctx .getBean("sesService"); SessionID sid = new SessionID(); sid.setUserid("" + user.getUserId()); sesService.del(sid); } catch (Exception e) { e.printStackTrace(); } } }  

在上面的例子中：可以直接取Spring中的實體Bean.

 

WebApplicationContext ctx = WebApplicationContextUtils

      .getRequiredWebApplicationContext(session.getServletContext());

 

3，要使HttpSessionListener啓作業，還需要在wex.xml中配置

<?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>CampusCRM</display-name> <!-- struts2配置 --> <filter> <filter-name>Struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>Struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <session-config> <session-timeout>300</session-timeout> </session-config> <!--Spring相關配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/applicationContext-*.xml,classpath*:applicationContext-*.xml </param-value> </context-param> <!-- spring 配置 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <listener> <listener-class>cn.com.xinli.crm.core.UserOnline</listener-class> </listener> <!--配置定時任務 --> <servlet> <display-name>Quartz Initializer Servlet</display-name> <servlet-name>QuartzInitializer</servlet-name> <servlet-class>org.quartz.ee.servlet.QuartzInitializerServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>  

這樣就完工了