java XML problem

First Look xml
-----------------

  <?xml version="1.0" encoding="GB2312" standalone="no"?>
  <公司人员 xmlns:p1="first://www.dlrin.com" xmlns:p2="second://www.dlrin.com">
  	<p1:张三>1989年出生，毕业于上海交通大学</p1:张三>
  	<p2:张三>1972年出生，毕业于中国科学技术大学</p2:张三>
  	<李四>1985年出生，毕业于北京大学</李四>
  </公司人员>

---------------------
Then take a look at my Java code :

  public class test {
  	public static void main(String[] args) throws Exception{
  		DocumentBuilderFactory docbudfact = DocumentBuilderFactory.newInstance() ;
  		DocumentBuilder docbud = docbudfact.newDocumentBuilder() ;
  		Document doc = docbud.parse(new File("a.xml"));
  		Element element = doc.getDocumentElement();
  		NodeList nodelist = element.getElementsByTagNameNS("second://www.dlrin.com", "张三");
  		findNodeMessage(nodelist);
  		nodelist = element.getElementsByTagName("李四");
  		findNodeMessage(nodelist);
  	}
  
  	public static void findNodeMessage(NodeList nodelist) {
  		int size = nodelist.getLength() ;
  		for(int k=0 ; k<size ; k++ ){
  			Node node = nodelist.item(k) ;
  			String name = node.getNodeName() ;
  			int index = name.indexOf(":");
  			if(index != -1){
  				name = name.substring(index+1) ;
  			}
  			String content = node.getTextContent() ;
  			content = content.trim() ;
  			System.out.println(name+":"+content);
  		}
  	}
  }

run , the result is : John Doe : born in 1985 , graduated from Peking University

questions:
Why connotes the information does not appear, I can use a namespace query method to query the local name of the node , ah, how the seating of the result is still not out ?
------ Solution ---------------------------------------- ----


Joe Smith
There go somewhere . .
------ Solution ---------------------------------------- ----

DocumentBuilderFactory docbudfact = DocumentBuilderFactory
  				.newInstance();
  		try {
  			DocumentBuilder docbud = docbudfact.newDocumentBuilder();
  			Document doc = docbud.parse(new File("a.xml"));
  			Element element = doc.getDocumentElement();
  			NodeList nodelist = element.getElementsByTagNameNS(
  					"second://www.dlrin.com", "p1:张三");
  					//"second://www.dlrin.com", "p2:张三");
  			nodelist = element.getElementsByTagName("张三");
  			findNodeMessage(nodelist);
  			nodelist = element.getElementsByTagName("李四");
  			findNodeMessage(nodelist);
  		} catch (ParserConfigurationException e) {
  			// TODO Auto-generated catch block
  			e.printStackTrace();
  		}

------ Solution ------------------------------ --------------

//我测试了 可以得到张三
  //1989年出生，毕业于上海交通大学
  NodeList nodelist = element.getElementsByTagNameNS( "second://www.dlrin.com", "p1:张三");
  //张三>1972年出生，毕业于中国科学技术大学
  NodeList nodelist = element.getElementsByTagNameNS( "second://www.dlrin.com", "p2:张三");                   
                    

------ Solution -------------------- ------------------------
you less a statement ! docbudfact.setNamespaceAware (true);
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Oh, what difference , please advise ! [Note : I have here two different domain name connotes , but I just use the domain name lookup ah ]
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using your method , and can only get information about John Doe .
I want to know "second :/ / www.dlrin.com" John Smith 's information , how to do it ?
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Indeed, buttoned up , thank you ...