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  • XMLHttpRequest学习笔记一

    通过XMLHttpRequest从服务端获取数据,并以表格方式进行展现,代码如下:

    <%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    
    response.setHeader("Pragma","No-Cache");
    response.setHeader("Cache-Control","No-Cache");
    response.setHeader("Expires","0");
    %>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <base href="<%=basePath%>">
        
        <title>My JSP 'testxmlhttprequest.jsp' starting page</title>
        
    	<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">
    	-->
    
      </head>
      
      <body>
      	<!-- 请求服务器端的xml数据文件,并以表格方式进行展现 -->
        <script type="text/javascript">
        	
        	var xmlHttpRequest;
        	function createXMLHttpRequest() {
        		//support IE7+,firefox,Chrome,Opera,Safari and so on
        		if (window.XMLHttpRequest) {
        			xmlHttpRequest = new XMLHttpRequest();
        		} else {
        			//support IE6,IE5
        			//xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
        			xmlHttpRequest = new ActiveXObject("MSXML2.XMLHTTP.3.0");
        		}
        		return xmlHttpRequest;
        	}
        	
        	//创建xmlhttp请求对象
        	xmlHttpRequest = createXMLHttpRequest();
        	xmlHttpRequest.open("GET","webpage/book.xml",false);
        	xmlHttpRequest.send();
        	
        	//
        	alert(xmlHttpRequest.responseText);
        	
        	var xmldom = xmlHttpRequest.responseXML;
        	//解析XMLDOM
        	var e_books = xmldom.getElementsByTagName("books")[0];
        	var e_book_array = e_books.childNodes;
        	document.writeln("<table border='1'>");
        	document.writeln("<tr><th>ID</th><th>Name</th><th>Author</th></tr>");
        	for(var i=0; i<e_book_array.length; i++) {
        		var e = e_book_array[i];
        		document.writeln("<tr><td>" + e.getElementsByTagName("id")[0].childNodes[0].nodeValue 
        		+ "</td><td>" + e.getElementsByTagName("name")[0].childNodes[0].nodeValue
        		+ "</td><td>" + e.getElementsByTagName("author")[0].childNodes[0].nodeValue 
        		+ "</td></tr>");
        	}
        	document.writeln("</table>");
        	
        </script>
      </body>
    </html>
    





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  • 原文地址:https://www.cnblogs.com/yyuuaannllii/p/3775219.html
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