xpath学习

最新推荐文章于 2024-12-30 12:08:53 发布

最新推荐文章于 2024-12-30 12:08:53 发布 · 107 阅读

文章标签：

#Firefox #JavaScript #IE #XML #iBATIS #ViewUI

javascript 专栏收录该内容

8 篇文章

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学习地址http://www.w3school.com.cn/xpath/index.asp

例子总结：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>xpath学习</title>
		<script type="text/javascript" src="js/xpath.js"></script>
        <script type="text/javascript">
        	 var exploer;
            //加载xml文件
            function loadXMLDoc(dname){
                try //Internet Explorer
                {
                    xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
					exploer='ie';
                } 
                catch (e) {
                    try //Firefox, Mozilla, Opera, etc.
                    {
                        xmlDoc = document.implementation.createDocument("", "", null);
						exploer='firefox';
                    } 
                    catch (e) {
                        alert(e.message)
                    }
                }
                try {
                    xmlDoc.async = false;
                    xmlDoc.load(dname);
                    return (xmlDoc);
                } 
                catch (e) {
                    alert(e.message)
                }
                return (null);
            }
            
            
            function fnIEParse(path){
                var nodes = xmlDoc.selectNodes(path);
				var result = document.getElementById("result");
				var str = "";
                for (var i = 0; i < nodes.length; i++) {
                    var node = nodes[i];
					str = str + node.xml;
			    }
				result.value = str; 
            }
            
            function fnFirefoxParse(path){
                var oNSResolver = xmlDoc.createNSResolver(xmlDoc.documentElement);
                var nodes = xmlDoc.evaluate(xpath, xmlDoc, oNSResolver, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
                var result = document.getElementById("result");
				var str = "";
                for (var i = 0; i < nodes.length; i++) {
                    var node = nodes[i];
					str = str + node.xml;
			    }
				result.value = str; 
            }
            
            var ibatisDoc = loadXMLDoc("Student.ibatis.xml");
            var bookDoc = loadXMLDoc("books.xml");
			//使用xpath函数加入该语句
           bookDoc.setProperty("SelectionLanguage","XPath");
			function fnSelectNodes(){
				var path=document.getElementById("path").value;  
               if(exploer=='ie'){  
                    fnIEParse(path);  
               }else if(exploer='firefox'){  
                    fnFirefoxParse(path);  
                }else{  
                    alert("由于你的浏览器不支持Javascript,path...");    
                }  
			}
			
			window.onload = function(){
				document.getElementById("bthSearch").onclick = fnSelectNodes;
				
			};
        </script>
    </head>
    <body>
		/bookstore/book<br/>
		/bookstore/book[0]<br/>
		/bookstore/book/author/text()<br/>
		/bookstore/book[price>35]/price<br/>
		/bookstore/book[price>35]/title<br/>
		/bookstore/book[1]<br/>
		/bookstore/book[last()]<br/>
		//title[@lang]<br/>
		//title[@lang='en']<br/>
		/bookstore/book/title | //price<br/>
		/bookstore/book[position()<3]<br/>
    	<p>xpath表达式：<input type="text" id="path" size="120"/>
        <input id="bthSearch" type="button" value="确定"/>  
		</p>
	  <a href="books.xml" target="_blank">books.xml</a>
	  <textarea id="result" cols="150" rows="20"></textarea>
    </body>
</html>