XML解析之DOM

DOM解析操作步骤：

1、建立DocumentBuilderFactory：

DocumentBuilderFactoryfactory = DocumentBuilderFactory.newInstance();

2、建立DocumentBuilder：

DocumentBuilder builder = factory.newDocumentBuilder();

3、建立Document:

Document doc = builder.parse("要读取的文件路径");

4、建立NodeList:

NodeList nl = doc.getElementsByTagName("读取节点");

5、进行XML信息读取。

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要解析的XML文档：demo.xml

<?xml version="1.0" encoding="GBK"?>
<addresslist>
<linkman>
<name>小新</name>
<email>xiaoxin@163.com</email>
</linkman>
<linkman>
<name>小白</name>
<email>xiaobai@163.com</email>
</linkman>
</addresslist>


-----------------------------------------------------------------------

import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;


public class DOMDemo {

	public static void main(String[] args) {
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		DocumentBuilder builder = null;
		try{
			builder = factory.newDocumentBuilder();
		}catch(ParserConfigurationException e){
			e.printStackTrace();
		}
		Document doc = null;
			try {
				doc = builder.parse("d:"+File.separator+"demo.xml");
			} catch (SAXException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
			NodeList nl = doc.getElementsByTagName("linkman");
			for(int x =0;x<nl.getLength();x++){
				Element e =(Element) nl.item(x);
				System.out.println("姓名："+e.getElementsByTagName("name").item(0).getFirstChild().getNodeValue());
				System.out.println("邮箱："+e.getElementsByTagName("email").item(0).getFirstChild().getNodeValue());
			}
	}

}

姓名：小新 邮箱：xiaoxin@163.com 姓名：小白 邮箱：xiaobai@163.com

（编辑：李大同）

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