dom和xpath解析xml

import java.util.List;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.junit.Test;

/**
 * 解析xml
 * @author WangShuang
 *
 */
public class Demo {
	/**
	 * 获取xml标签的文本内容和属性值
	 * @param args
	 */
	@Test
	public void run1() {
		try {
			//1.创建解析器对象
			SAXReader sax = new SAXReader();
			
			//2.解析xml文档
			Document document = sax.read("src/test.xml");
			
			//3.获得跟节点
			Element root = document.getRootElement();
			
			//4获取学生节点
			Element student = root.element("student");
			
			//5获取学生姓名节点
			Element name = student.element("name");
			System.out.println(name.getText());
			
			//获取学生属性编号的值
			Attribute attribute = name.attribute("id");
			System.out.println(attribute.getValue());
			
		} catch (DocumentException e) {
			e.printStackTrace();
		}
	}
	/**
	 * xpath获取xml标签的文本内容和属性值
	 * @param args
	 */
	@Test
	public void run2() {
		try {
			// 1. 先创建解析器对象
			SAXReader sax = new SAXReader();
			//2 .解析xml文档
			Document document = sax.read("src/test.xml");
			// document是Node的子节点，能使用node节点对象的方法
			Node node = document.selectSingleNode("//name");
			// 获取学生姓名
			System.out.println(node.getText());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	/**
	 * xpath获取xml标签的文本内容和属性值
	 * @param args
	 */
	@Test
	public void run3() {
		try {
			SAXReader sax = new SAXReader();
			Document document = sax.read("src/test.xml");
			List<Node> selectNodes = document.selectNodes("//name");
			for (Node node : selectNodes) {
				System.out.println(node.getText());
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

需要导入的jar包

<?xml version="1.0" encoding="UTF-8"?>
<Person>
	<student>
		<name id="01">张三</name>
		<sex>男</sex>
	</student>
	<!-- <student>
		<name id="01">lili</name>
		<sex>nv</sex>
	</student> -->
</Person>