XML简单解析之Dom解析

User.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration>
<configuration>
       <name>马云</name>
       <password>111111</password>
</configuration>

import java.io.File;
import java.io.IOException;

import javax.naming.NameNotFoundException;
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.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
import org.xml.sax.SAXException;

public class XMLAnalysis {

	public static void main(String[] args) {
		try {
			// 首先创造一个DocumentBuilder对象，可以从DocumentBuilderFactory中得到
			DocumentBuilderFactory factory = DocumentBuilderFactory
					.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			// 从文件中读入某个文档
			File f = new File("User.xml");
			Document doc = builder.parse(f);
			// 启动对文档内容的分析，返回根元素
			Element root = doc.getDocumentElement();
			// System.out.println(root);
			// 获取根元素子元素
			NodeList children = root.getChildNodes();
			for (int i = 0; i < children.getLength(); i++) {
				Node child = children.item(i);
				if (child instanceof Element) {// 只得到子元素，忽略空白元素
					Element childElement = (Element) child;
					Text textNode = (Text) childElement.getFirstChild();
					String text = textNode.getData().trim();// 剔除实际数据前后的空白字符
					if (childElement.getTagName().equals("name")) {
						System.out.println("name:" + text);
					}
					if (childElement.getTagName().equals("password")) {
						System.out.println("password:" + text);
					}
				}
			}
		} catch (ParserConfigurationException | SAXException | IOException e) {
			e.printStackTrace();
		}
	}
}