统计在线已登录用户数量并获取客户端IP（涉及HttpSessionListener监听）

Bertha 。 2022-05-10 07:42 94阅读 0赞

项目需要做一个统计在线登陆用户数量的功能。

首先我想到的是写HttpSessionListener监听，根据session来确定用户数量。

步骤：

web.xml配置HttpSessionListener监听

<listener>
    		<listener-class>org.hd.base.listener.HDSessionListener</listener-class>
    	</listener>

监听的类：

package org.hd.base.listener;
    
    import javax.servlet.http.HttpSessionEvent;
    import javax.servlet.http.HttpSessionListener;
    
    import org.apache.log4j.Logger;
    import org.hd.util.ConstantDifinitionUtil;
    
    
    public class HDSessionListener implements HttpSessionListener {
    	private static final Logger logger = Logger.getLogger(HDSessionListener.class.getName());
    	
    	public void sessionCreated(HttpSessionEvent sessionEvent) {
    		logger.error("HelpDesk system sessionCreated, sessionid=" + sessionEvent.getSession().getId());
    	}
    
    	public void sessionDestroyed(HttpSessionEvent sessionEvent) {
    		String userJobNumber="";
    		if(sessionEvent.getSession().getAttribute(ConstantDifinitionUtil.CURRENT_USER_ID)!=null){
    			userJobNumber=(String)sessionEvent.getSession().getAttribute(ConstantDifinitionUtil.CURRENT_USER_ID);
    		}
    		logger.error("HelpDesk system sessionDestroyed, sessionid=" + sessionEvent.getSession().getId()
    				+";登录用户工号是："+userJobNumber);
    	}
    }

再写个类查看信息：

package org.hd.tempuser.action;
    
    import java.io.PrintWriter;
    import java.util.Iterator;
    import java.util.Map;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import org.apache.log4j.Logger;
    import org.apache.struts2.ServletActionContext;
    import org.hd.tempuser.service.TempUserService;
    import org.rd.framework.common.container.ContainerManager;
    import org.rd.framework.struts.action.CommonAction;
    
    import com.opensymphony.xwork2.ActionContext;
    
    public class AllUserMonitorAction extends CommonAction{
    	private static final long serialVersionUID = 1L;
    	private static final Logger logger = Logger.getLogger(AllUserMonitorAction.class.getName());
    	private TempUserService tempUserService = (TempUserService)ContainerManager.getComponent(TempUserService.BEAN_ID);
    	
    	//查看在线所有用户
    	public String monitorAllUsersNow() throws Exception{
    		
    		ActionContext ctx = ActionContext.getContext();
    		HttpServletResponse response = (HttpServletResponse) ctx.get(ServletActionContext.HTTP_RESPONSE); 
    		HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP_REQUEST); 
    		HttpSession session=request.getSession();
    		Map appMap=ctx.getApplication();
    		
    		response.setCharacterEncoding("UTF-8");
    		PrintWriter out = response.getWriter();
    		
    		
    		System.err.println("session的id是："+session.getId());
    		session.setAttribute("haha", session.getId());
    		
    		return SUCCESS;
    	}
    	//查看当前的sessionId以及属性"haha"的值
        public String monitorUserInfoFromSession() throws Exception{
    		
    		ActionContext ctx = ActionContext.getContext();
    		HttpServletResponse response = (HttpServletResponse) ctx.get(ServletActionContext.HTTP_RESPONSE); 
    		HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP_REQUEST); 
    		HttpSession session=request.getSession();
    		
    		response.setCharacterEncoding("UTF-8");
    		PrintWriter out = response.getWriter();
    		
    		
    		System.err.println("session的id是(session.getId())："+session.getId());
    		System.err.println("从session的属性中取出的id是(session.getAttribute(\"haha\"))："+session.getAttribute("haha"));
    //		out.println("YES");
    		return SUCCESS;
    	}
    	
    	public String execute() throws Exception{
    		return SUCCESS;
    	}
    
    }

开始测试：

第一个人访问登陆页面

<2012-12-11 14:46:00,977> ERROR (HDSessionListener.java:14) \[http-80-1\] (org.hd.base.listener.HDSessionListener) - HelpDesk system sessionCreated, sessionid=86938C672ADD0922845ED8DDD1575B6F

继续访问请求  
[http://helpdesk.citicsinfo.com/tempUser/monitorAllUsersNow.action][http_helpdesk.citicsinfo.com_tempUser_monitorAllUsersNow.action]

打印：  
session的id是：86938C672ADD0922845ED8DDD1575B6F

访问请求  
[http://helpdesk.citicsinfo.com/tempUser/monitorUserInfoFromSession.action][http_helpdesk.citicsinfo.com_tempUser_monitorUserInfoFromSession.action]  
打印：  
session的id是(session.getId())：86938C672ADD0922845ED8DDD1575B6F  
从session的属性中取出的id是(session.getAttribute("haha"))：86938C672ADD0922845ED8DDD1575B6F

在第一个人未退出系统的情况下，第二个人访问该系统，  
访问登陆页面：

打印：  
<2012-12-11 14:50:25,941> ERROR (HDSessionListener.java:14) \[http-80-3\] (org.hd.base.listener.HDSessionListener) - HelpDesk system sessionCreated, sessionid=63C1C0FB9FB34F8263C23EA06FD46320

访问方法monitorAllUsersNow  
打印：  
session的id是：63C1C0FB9FB34F8263C23EA06FD46320  
监控Monitor请求，经过过滤！

访问方法 monitorUserInfoFromSession  
打印：  
session的id是(session.getId())：63C1C0FB9FB34F8263C23EA06FD46320  
从session的属性中取出的id是(session.getAttribute("haha"))：63C1C0FB9FB34F8263C23EA06FD46320  
监控Monitor请求，经过过滤！

第一个人继续访问方法 monitorUserInfoFromSession（查看属性haha的值）  
打印：  
session的id是(session.getId())：86938C672ADD0922845ED8DDD1575B6F  
从session的属性中取出的id是(session.getAttribute("haha"))：86938C672ADD0922845ED8DDD1575B6F

第二个人也继续访问方法 monitorUserInfoFromSession（查看属性haha的值）（注意此时这个人还不算是登陆成功）  
打印：  
session的id是(session.getId())：63C1C0FB9FB34F8263C23EA06FD46320  
从session的属性中取出的id是(session.getAttribute("haha"))：63C1C0FB9FB34F8263C23EA06FD46320  
监控Monitor请求，经过过滤！

从上面的实验我们可以得出几个结论：

1：当客户端访问服务器时，服务器会检查jsessionId，看是不是同一个session。  
如果是同一个，就那这个session进行处理；如果不是，就创建一个新的session。  
服务器辨认session是通过sessionId的，不通的session有不通的id，所以每个客户端可以在session放相同属性名的值而不会  
被覆盖。

2，一般登陆是需要验证的，即用户名和密码正确才算是登陆成功。  
如果登录失败，session已经创建了，以这个作为在线用户的依据，从逻辑上就是错的！  
这个作为点击量或者访问量还是可以的。

3,即使关闭浏览器，session还是存在的。所以当用户退出系统时，要把session失效。  
session.invalidate();  
这样监听才会有输出，表明这个session被Destroyed。  
<2012-12-11 15:14:00,818> ERROR (HDSessionListener.java:22) \[http-80-4\] (org.hd.base.listener.HDSessionListener) - HelpDesk system sessionDestroyed, sessionid=86938C672ADD0922845ED8DDD1575B6F;登录用户工号是：

所以从session中获取的用户账号当然是null了。

为了获取准确的在线登陆的用户的数量，使用HttpSessionListener监听这个方法是不行的，必须要改变思路。  
我的思路是：  
修改登陆和退出的类，在登陆成功后使用application对象保存当前用户的sessionId和账号（作为键值对保存），  
在退出系统时，从application对象中遍历取出所有值（还有其他值，你保存的值最好有记号或者规律）,  
这样就把所有登陆用户的账号和sessionId拿到了，把当前要退出系统的sessionId和账号remove掉。  
这样作为全局变量的application对象就作为一个我们存储所有当前登陆用户的容器，只要维护好这个容器，  
就能保证在线人数的数值是正确的。

现在我们修改查看当前所有在线人数的那个类AllUserMonitorAction

package org.hd.tempuser.action;
    
    import java.io.PrintWriter;
    import java.util.Iterator;
    import java.util.Map;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import org.apache.log4j.Logger;
    import org.apache.struts2.ServletActionContext;
    import org.hd.tempuser.service.TempUserService;
    import org.rd.framework.common.container.ContainerManager;
    import org.rd.framework.struts.action.CommonAction;
    
    import com.opensymphony.xwork2.ActionContext;
    
    public class AllUserMonitorAction extends CommonAction{
    	private static final long serialVersionUID = 1L;
    	private static final Logger logger = Logger.getLogger(AllUserMonitorAction.class.getName());
    	private TempUserService tempUserService = (TempUserService)ContainerManager.getComponent(TempUserService.BEAN_ID);
    	
    	//查看在线所有用户
    	public String monitorAllUsersNow() throws Exception{
    		
    		ActionContext ctx = ActionContext.getContext();
    		HttpServletResponse response = (HttpServletResponse) ctx.get(ServletActionContext.HTTP_RESPONSE); 
    		HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP_REQUEST); 
    		HttpSession session=request.getSession();
    		Map appMap=ctx.getApplication();
    		
    		response.setCharacterEncoding("UTF-8");
    		PrintWriter out = response.getWriter();
    		
    		
    //		System.err.println("session的id是："+session.getId());
    //		session.setAttribute("haha", session.getId());
    		
    		if(appMap!=null){
    			Iterator it=appMap.keySet().iterator();
    			for(;it.hasNext();){
    				Object key=it.next();
    				Object value=appMap.get(key.toString());
    				System.out.println("App;ication中的键值对,key:"+key+",value:"+value);
    			}
    		}
    		return SUCCESS;
    	}
    	//查看当前的sessionId以及属性"haha"的值
        public String monitorUserInfoFromSession() throws Exception{
    		
    		ActionContext ctx = ActionContext.getContext();
    		HttpServletResponse response = (HttpServletResponse) ctx.get(ServletActionContext.HTTP_RESPONSE); 
    		HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP_REQUEST); 
    		HttpSession session=request.getSession();
    		
    		response.setCharacterEncoding("UTF-8");
    		PrintWriter out = response.getWriter();
    		
    		
    		System.err.println("session的id是(session.getId())："+session.getId());
    		System.err.println("从session的属性中取出的id是(session.getAttribute(\"haha\"))："+session.getAttribute("haha"));
    //		out.println("YES");
    		return SUCCESS;
    	}
    	
    	public String execute() throws Exception{
    		return SUCCESS;
    	}
    
    }

同时修改登陆和退出系统的代码：  
登录成功时，在application对象中放入键值对：sessionId和账号  
如：  
ActionContext ctx = ActionContext.getContext();  
HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP\_REQUEST);  
HttpSession session = request.getSession();

if(登陆成功)\{  
   ctx.getApplication().put("HelpDeskSession"+session.getId(), 账号);//前面的字符串是为了更容易寻找  
\}

在退出系统时：  
if(session.getId()!=null)\{  
   ctx.getApplication().remove("HelpDeskSession"+session.getId());  
  \}

方案已经有了，现在开始写代码和测试

第一个人登陆后，我们访问monitorAllUsersNow方法

打印：

Application中的键值对,key:org.apache.catalina.WELCOME\_FILES,value:\[Ljava.lang.String;@1021349  
Application中的键值对,key:AxisEngine,value:org.apache.axis.server.AxisServer@76e297  
Application中的键值对,key:org.apache.AnnotationProcessor,value:org.apache.catalina.util.DefaultAnnotationProcessor@11e71f9  
Application中的键值对,key:org.apache.catalina.jsp\_classpath,value:/xx  
Application中的键值对,key:org.springframework.web.context.support.ServletContextScope,value:org.springframework.web.context.support.ServletContextScope@119bde5  
Application中的键值对,key:org.apache.jasper.runtime.JspApplicationContextImpl,value:org.apache.jasper.runtime.JspApplicationContextImpl@14039d5  
Application中的键值对,key:org.apache.catalina.resources,value:org.apache.naming.resources.ProxyDirContext@19504ee  
Application中的键值对,key:javax.servlet.context.tempdir,value:D:\\HelpDesk\\workSpace\\ROOT\\WebContent\\WEB-INF\\classes  
Application中的键值对,key:org.springframework.web.context.WebApplicationContext.ROOT,value:Root WebApplicationContext: startup date \[Tue Dec 11 16:02:04 CST 2012\]; root of context hierarchy  
Application中的键值对,key:HelpDeskSession2C6D2B26AB0BC498923FE8DD4799CBEB,value:T000851.当前在线  
Application中的键值对,key:CONFIGURATION\_CONTEXT,value:org.apache.axis2.context.ConfigurationContext@11654e0  
Application中的键值对,key:AdminServletAxisEngine,value:org.apache.axis.server.AxisServer@76e297  
所有在线人数是1

第二个人登陆后，在访问这个方法，  
打印：

Application中的键值对,key:org.apache.catalina.WELCOME\_FILES,value:\[Ljava.lang.String;@1021349  
Application中的键值对,key:AxisEngine,value:org.apache.axis.server.AxisServer@76e297  
Application中的键值对,key:org.apache.catalina.resources,value:org.apache.naming.resources.ProxyDirContext@19504ee  
Application中的键值对,key:HelpDeskSessionBF0009485F6E34FA23F4DD7DCE5BF96D,value:T001890.当前在线  
Application中的键值对,key:org.springframework.web.context.WebApplicationContext.ROOT,value:Root WebApplicationContext: startup date \[Tue Dec 11 16:02:04 CST 2012\]; root of context hierarchy  
Application中的键值对,key:CONFIGURATION\_CONTEXT,value:org.apache.axis2.context.ConfigurationContext@11654e0  
Application中的键值对,key:AdminServletAxisEngine,value:org.apache.axis.server.AxisServer@76e297  
Application中的键值对,key:org.springframework.web.context.support.ServletContextScope,value:org.springframework.web.context.support.ServletContextScope@119bde5  
Application中的键值对,key:org.apache.catalina.jsp\_classpath,value:/xxx  
Application中的键值对,key:org.apache.AnnotationProcessor,value:org.apache.catalina.util.DefaultAnnotationProcessor@11e71f9  
Application中的键值对,key:org.apache.jasper.runtime.JspApplicationContextImpl,value:org.apache.jasper.runtime.JspApplicationContextImpl@14039d5  
Application中的键值对,key:javax.servlet.context.tempdir,value:D:\\HelpDesk\\workSpace\\ROOT\\WebContent\\WEB-INF\\classes  
Application中的键值对,key:HelpDeskSession2C6D2B26AB0BC498923FE8DD4799CBEB,value:T000851.当前在线  
所有在线人数是2

然后第二个人再退出系统后我们再访问  
打印：  
Application中的键值对,key:org.apache.catalina.WELCOME\_FILES,value:\[Ljava.lang.String;@1021349  
Application中的键值对,key:AxisEngine,value:org.apache.axis.server.AxisServer@76e297  
Application中的键值对,key:org.apache.AnnotationProcessor,value:org.apache.catalina.util.DefaultAnnotationProcessor@11e71f9  
Application中的键值对,key:org.apache.catalina.jsp\_classpath,value:/xxx  
Application中的键值对,key:org.springframework.web.context.support.ServletContextScope,value:org.springframework.web.context.support.ServletContextScope@119bde5  
Application中的键值对,key:org.apache.jasper.runtime.JspApplicationContextImpl,value:org.apache.jasper.runtime.JspApplicationContextImpl@14039d5  
Application中的键值对,key:org.apache.catalina.resources,value:org.apache.naming.resources.ProxyDirContext@19504ee  
Application中的键值对,key:javax.servlet.context.tempdir,value:D:\\xxx  
Application中的键值对,key:org.springframework.web.context.WebApplicationContext.ROOT,value:Root WebApplicationContext: startup date \[Tue Dec 11 16:02:04 CST 2012\]; root of context hierarchy  
Application中的键值对,key:HelpDeskSession2C6D2B26AB0BC498923FE8DD4799CBEB,value:T000851.当前在线  
Application中的键值对,key:CONFIGURATION\_CONTEXT,value:org.apache.axis2.context.ConfigurationContext@11654e0  
Application中的键值对,key:AdminServletAxisEngine,value:org.apache.axis.server.AxisServer@76e297  
所有在线人数是1

好，现在已经可以成功获取正确数据，修改登陆和退出，我们把客户端的IP地址记录下来。  
String remoteAddr=request.getRemoteAddr()==null?"":request.getRemoteAddr();  
ctx.getApplication().put("HelpDeskSession"+request.getSession().getId(), getUname()+"suolong"+remoteAddr);

下面就是对数据的处理，拼装成json，在页面做个列表。  
最后的代码：

package org.hd.tempuser.action;
    
    import java.io.PrintWriter;
    import java.net.InetAddress;
    import java.net.UnknownHostException;
    import java.util.Iterator;
    import java.util.Map;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import org.apache.log4j.Logger;
    import org.apache.struts2.ServletActionContext;
    import org.hd.tempuser.service.TempUserService;
    import org.hd.util.ReportUtil;
    import org.rd.framework.common.container.ContainerManager;
    import org.rd.framework.struts.action.CommonAction;
    
    import com.opensymphony.xwork2.ActionContext;
    
    public class AllUserMonitorAction extends CommonAction{
    	private static final long serialVersionUID = 1L;
    	private static final Logger logger = Logger.getLogger(AllUserMonitorAction.class.getName());
    	private TempUserService tempUserService = (TempUserService)ContainerManager.getComponent(TempUserService.BEAN_ID);
    	
    	//查看在线所有用户
    	public String monitorAllUsersNow() throws Exception{
    		
    		ActionContext ctx = ActionContext.getContext();
    		HttpServletResponse response = (HttpServletResponse) ctx.get(ServletActionContext.HTTP_RESPONSE); 
    		HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP_REQUEST); 
    		HttpSession session=request.getSession();
    		Map appMap=ctx.getApplication();
    		
    		response.setCharacterEncoding("UTF-8");
    		PrintWriter out = response.getWriter();
    		
    		
    //		System.err.println("session的id是："+session.getId());
    //		session.setAttribute("haha", session.getId());
    		
    		String resJson="";
    		String numJson="";
    		String listJson="\"listdata\":[";
    		int count=0;
    		if(appMap!=null){
    			Iterator it=appMap.keySet().iterator();
    			
    			for(;it.hasNext();){
    				Object key=it.next();
    				String keyStr=key.toString();
    				Object value=appMap.get(keyStr);
    				String valueStr=value.toString();
    				
    				String[] arr=valueStr.split("suolong");
    				String jobNumber=(arr.length>=1)?arr[0]:"";
    				String userIP=(arr.length>=2)?arr[1]:"";
    				//本机IP要另写方法实现
    				if(userIP.equals("127.0.0.1")){
    					userIP=this.getLocalIP();
    				}
    				
    				if(keyStr.startsWith("HelpDeskSession")){
    					//System.out.println("Application中的键值对,key:"+keyStr+",value:"+valueStr+".当前在线");
    					String strJson="{\"jobNumber\":\""+jobNumber+"\",\"userIP\":\""+userIP+"\"}";
    					if(count==0){
    						listJson+=strJson;
    					}else{
    						listJson+=","+strJson;
    					}
    					count++;
    				}else{
    					//System.out.println("Application中的键值对,key:"+keyStr+",value:"+valueStr);
    				}
    				
    			}// end for
    		}//end if
    		
    		numJson="\"numJson\":{\"count\":\""+count+"\"}";
    		listJson+="]";
    		
    		resJson="{"+numJson+ ","+listJson+"}";
    		out.println(resJson);
    		System.out.println("resJson是"+resJson);
    		return NONE;
    	}
    	//查看当前的sessionId以及属性"haha"的值
        public String monitorUserInfoFromSession() throws Exception{
    		
    		ActionContext ctx = ActionContext.getContext();
    		HttpServletResponse response = (HttpServletResponse) ctx.get(ServletActionContext.HTTP_RESPONSE); 
    		HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP_REQUEST); 
    		HttpSession session=request.getSession();
    		
    		response.setCharacterEncoding("UTF-8");
    		PrintWriter out = response.getWriter();
    		
    		
    		System.err.println("session的id是(session.getId())："+session.getId());
    		System.err.println("从session的属性中取出的id是(session.getAttribute(\"haha\"))："+session.getAttribute("haha"));
    //		out.println("YES");
    		return SUCCESS;
    	}
    	
        //获取本机实际IP
        public static String getLocalIP() {
    		InetAddress LocalIP =null;
    		try {
    			LocalIP = InetAddress.getLocalHost();
    		} catch (UnknownHostException e) {
                e.printStackTrace();
    		}
    		return LocalIP.getHostAddress();
    	}
    	public String execute() throws Exception{
    		return SUCCESS;
    	}
    
    }

jsp页面：

<%@ page language="java" contentType="text/html; charset=UTF-8"%>
    <%@ taglib uri="/struts-tags" prefix="s"%>
    <%@ taglib uri="/WEB-INF/component.tld" prefix="cx"%>
    <%@ taglib uri="/WEB-INF/greenpage.tld" prefix="page"%>
    <%@ page import="java.util.*" %>
    <%@ page import="org.hd.util.ReportUtil" %>
    <%@ page import="org.rd.framework.query.support.PaginationSupport" %>
    <%
    	String path = request.getContextPath();
    %>
    <%
    
    %>
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
         <title>Single Series Column 2D Chart</title>
    <script src="<%=path%>/script/jquery-1.7.1.js" type="text/javascript"></script>
    <link href="<%=path%>/resource/hd/css/style2.css" rel="stylesheet" type="text/css" />
    
    <script src="<%=path%>/resource/tool/hometab/Style/menu.js" type="text/javascript"></script>
    <link rel="stylesheet" href="<%=path%>/resource/tool/hometab/Style/default.css" type="text/css" />
    <script src="<%=path%>/script/hd/greenpage.js" type="text/javascript"></script>
    
    </script>
    
    </head>
    
    <body style=" overflow-y:scroll;overflow-x:auto;">
    <input type="hidden" id="path" value="<%=path%>" />
    
    
    <div style="width:100%;height:10px"></div>
    <h3 style="text-align: center;vertical-align:bottom;padding: 0px,0px,5px,0px; margin: 0px,0px,5px,0px; font-size:14px;color: #0c212b; ">
    在线用户列表</h3>
    
    <div style="width:100%;height:10px"></div>
    <table width="100%" border="0" align="center" style="margin-left: 220px;">
         <tr>
           <td style="width:100%;">
                <div >
    			<table>
    			  <tr style=" margin: 8px,0px,5px,0px;">
    			     <td style="width:10%"></td>
    			     
    			     <td style="width:5%;align:center"></td>
    			    
    			     <td id="countNum" style="width:30%;color:red;">
                    合计：   
    			     </td>
    			      <td style="width:5%"><input type="button" id="chaxun" οnclick="shuaxin()" value="刷新"></td>
    			  <td style="width:5%">
    			  
    			  </td>
    			  </tr>
    			</table>
    			</div>
           </td>
         </tr>
         <tr>
           <td style="width:100%;align:center">
                         
                         
    <div id="tablelist" >
        <table style="margin : 0px 0px 0px 0px;position: relative;left: 0px;top: 0px;
        width="100%"  height="100%" border="0" cellspacing="0" cellpadding="0" id="box_mid">
          <tr>
            <td class="right">
    
    		  <div class="divline2" >
    		  <table width="800px" border="0" cellspacing="0" cellpadding="0" class="tables2">
                  <tr  id="tableheaders">
                    <th width="45%">IP地址</th>
                    <th width="45%">坐席工号 </th>
                    
                  </tr>
                </table>
              </div>
     <div style="height:200px; overflow-y:none;width:100%;">
                <table width="100%" border="0" cellspacing="0" cellpadding="0" class="table4" id="list">
                  
    <div id="listdata">
    			
    			<tr>
                    <td width="45%"></td>
                    <td width="45%"></td>
                    
                  </tr>
    	</div>		
              </table>
              </div>
              </td>
          </tr>
        </table>
                    <div id="divpage" style="align:center"></div>     
       </div>             
                         
           </td>
         </tr>
         <tr>
           <td style="width:100%">
           </td>
         </tr>
         <tr>
           <td style="width:100%">
           
           </td>
         </tr>
    </table>
    
    
         </body>
     </html>
    <script type="text/javascript">
    var path=document.getElementById("path").value;
    
    shuaxin();
    //刷新
    var num=1;
    function shuaxin(){
    	var urlpath=path+'/tempUser/monitorAllUsersNow.action?randomstr='+Math.random();
    	$.ajax({
    		   type: "POST",
    		   url: urlpath,
    		   success: chaxunBackDealData,
    		   dataType:"json"
    		});
    }
    
    function chaxunBackDealData(data){
    	num++;
    	//  {"numJson":{"count":"2"},"listdata":[{"jobNumber":"T001890","userIP":"127.0.0.1"}]}
    	var count=data.numJson.count;
    	var listdata=data.listdata;
    	
    	
    	var heji="合计："+count;
    	if(num%2==0){
    		$("#countNum").css("color","green");
    	}else{
    		$("#countNum").css("color","red");
    	}
    	
    	$("#countNum").html(heji);
        
    var tablehtml="";
    	for(var i=0;i<listdata.length;i++){
    		//alert(listdata[i].agent_count);
    		var jobNumber=listdata[i].jobNumber;
    		var userIP=listdata[i].userIP;
    		
    		var htmlstr="<tr>";
    	      htmlstr+="<td width=\"45%\">"+userIP+"</td>";
    	      htmlstr+="<td width=\"46%\">"+jobNumber+"</td>";
    		htmlstr+="</tr>";
    		tablehtml+=htmlstr;
    	}
    	
    	$("#list").html(tablehtml);
    }
    
    
    
    
    </script>

效果：

![1355288719_6542.png][]

[http_helpdesk.citicsinfo.com_tempUser_monitorAllUsersNow.action]: http://helpdesk.citicsinfo.com/tempUser/monitorAllUsersNow.action
[http_helpdesk.citicsinfo.com_tempUser_monitorUserInfoFromSession.action]: http://helpdesk.citicsinfo.com/tempUser/monitorUserInfoFromSession.action
[1355288719_6542.png]: https://img-my.csdn.net/uploads/201212/12/1355288719_6542.png