实现网页不刷新页面的情况下动态刷新表格数据
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<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>主页中间</title> <link rel="stylesheet" href="css/public.css" /> <link rel="stylesheet" href="css/style.css" /> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> <script src="js/jquery.js"></script> <script type="text/javascript"> //全局xmlHttp对象 var xmlHttp; //获得xmlHttp对象 function createXMLHttp() { //对于大多数浏览器适用 var xmlHttp; if (window.XMLHttpRequest) { xmlHttp = new XMLHttpRequest(); } //考虑浏览器的兼容性 if (window.ActiveXObject) { xmlHttp = new ActiveXOject("Microsoft.XMLHTTP"); if (!xmlHttp) { xmlHttp = new ActiveXOject("Msxml2.XMLHTTP"); } } return xmlHttp; } //回调函数 function callback() { //4代表完成 if (xmlHttp.readyState == 4) { //200代表服务器响应成功,404代表资源未找到,500服务器内部错误 if (xmlHttp.status == 200) { //交互成功获得响应的数据,是文本格式 var result = xmlHttp.responseText; var tableStart = "<table id=‘test‘ class=‘providerTable‘ cellpadding=‘0‘ cellspacing=‘0‘ align=‘center‘ width=‘100%‘><tr>" var head = "<tr class=‘firstTr‘><th width=‘10%‘>终端号</th><th width=‘20%‘>终端名称</th><th width=‘20%‘>终端类型</th><th width=‘20%‘>终端状态</th><th width=‘20%‘>终端IP地址</th><th width=‘10%‘>终端音量</th></tr>" var tdStart = "<td>" var tdEnd = "</td>" //定义表格结束标签 ; var tableEnd = "</tr></table>" document.getElementById("t1").innerHTML = tableStart + head + tableEnd; var json1 = eval("(" + result + ")"); for (i = 0; i < json1.length; i++) { // 追加行 ; var oRow1 = test.insertRow(test.rows.length); // 获取表格的行集合。 var aRows = test.rows; // 获取第一行的单元格集合。 var aCells = oRow1.cells; // 在第一行中插入两个单元格。 var oCell1_1 = oRow1.insertCell(aCells.length); var oCell1_2 = oRow1.insertCell(aCells.length); var oCell1_3 = oRow1.insertCell(aCells.length); var oCell1_4 = oRow1.insertCell(aCells.length); var oCell1_5 = oRow1.insertCell(aCells.length); var oCell1_6 = oRow1.insertCell(aCells.length); var json = json1[i]; /* if(json.terminalState="断线"){ json.terminalIPAddress=""; json.terminalVol="" } else{} */ var terminalID = tdStart + json.terminalID + tdEnd var terminalIPAddress = tdStart + json.terminalIPAddress + tdEnd var terminalName = tdStart + json.terminalName + tdEnd var terminalState = tdStart + json.terminalState + tdEnd var terminalType = tdStart + json.terminalType + tdEnd var terminalVol = tdStart + json.terminalVol + tdEnd // 向单元格内填充数据 ; oCell1_1.innerHTML = terminalID; oCell1_2.innerHTML = terminalName; oCell1_3.innerHTML = terminalType; oCell1_4.innerHTML = terminalState; oCell1_5.innerHTML = terminalIPAddress; oCell1_6.innerHTML = terminalVol ; } setTimeout(getContents, 1000); } } } //获得内容 function getContents() { //首先获得用户的输入内容,这里获得的是一个结点 //var content = document.getElementById("keyword"); //if(content.value ==""){ // return; //} //向服务器发送内容,用到XmlHttp对象 xmlHttp = createXMLHttp(); //给服务器发送数据,escape()不加中文会有问题 var url = "Test"; //true表示js的脚本会在send()方法之后继续执行而不会等待来自服务器的响应 xmlHttp.open("GET", url, true); //xmlHttp绑定回调方法,这个方法会在xmlHttp状态改变的时候调用,xmlHttp状态有0-4, //我们只关心4,4表示完成 xmlHttp.onreadystatechange = callback; xmlHttp.send(null); } /* setInterval(function(){ $("#t1").load(location.href+"#v1>*",""); },3000); */ </script> </head> <body onload="getContents()"> <section class="publicMian " id="t1"> <!--表格 样式公用--> </section> </body> </html>
package com.cscy.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import hy.com.port.BroadcastImpl; import hy.com.rmi.entity.TerminalInfomation; import net.sf.json.JSONArray; public class TestServlet extends HttpServlet { /** * */ private static final long serialVersionUID = 1L; @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.setCharacterEncoding("utf-8"); resp.setCharacterEncoding("utf-8"); TerminalInfomation[] terminalInfo = BroadcastImpl.getTerminalInfomation(); resp.getWriter().write(JSONArray.fromObject(terminalInfo).toString()); } }
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