使用JavaDOM调用getAttributeNS的正确方法是什么?
从JavaDOM正确调用getAttributeNS()(和其他NS方法)时遇到问题。首先,这是我的示例XML文档:使用JavaDOM调用getAttributeNS的正确方法是什么?,java,dom,namespaces,Java,Dom,Namespaces,从JavaDOM正确调用getAttributeNS()(和其他NS方法)时遇到问题。首先,这是我的示例XML文档: <?xml version="1.0" encoding="UTF-8"?> <bookstore> <book xmlns:c="http://www.w3schools.com/children/" xmlns:foo="http://foo.org/foo" category="CHILDREN"> <tit
<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
<book xmlns:c="http://www.w3schools.com/children/" xmlns:foo="http://foo.org/foo" category="CHILDREN">
<title foo:lang="en">Harry Potter</title>
<author>J K. Rowling</author>
<year>2005</year>
<price>29.99</price>
</book>
</bookstore>
当我调用getAttributeNS(“,“lang”)时,它返回一个空字符串。我也尝试过getAttributeNS(“foo”,“lang”),同样的结果
检索由命名空间限定的属性值的正确方法是什么
谢谢。紧跟在
DocumentBuilderFactory dbFactory=DocumentBuilderFactory.newInstance()之后
,添加dbFactory.setNamespaceAware(true)代码>哦,天哪,这真是个好主意。谢谢如果像getAttributeNS()这样的DOM“NS”方法上的Javadoc提到这一点,那就太好了。
package com.mycompany.proj;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Element;
import java.io.File;
public class AttributeNSProblem
{
public static void main(String[] args)
{
try
{
File fXmlFile = new File("bookstore_ns.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
System.out.println("Root element: " + doc.getDocumentElement().getNodeName());
NodeList nList = doc.getElementsByTagName("title");
Element elem = (Element)nList.item(0);
String lang = elem.getAttributeNS("http://foo.org/foo", "lang");
System.out.println("title lang: " + lang);
lang = elem.getAttribute("foo:lang");
System.out.println("title lang: " + lang);
}
catch (Exception e)
{
e.printStackTrace();
}
}
}