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>