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

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

打印：
session的id是：86938C672ADD0922845ED8DDD1575B6F

访问请求
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" onclick="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"><!--列表-->

		  <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>
          <!--列表END--></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：