本文共 2908 字，大约阅读时间需要 9 分钟。

dom4j是一个Java/XML应用程序编程接口（API），旨在高效读取和操作XML文件。它是jdom的升级版本，性能优越、功能强大且易于使用。dom4j不仅性能优于Sun公司官方的DOM技术，还支持开源开发，可从SourceForge获取。

Jar包依赖

dom4j-2.0.0-RC1.jar

代码示例

以下是基于dom4j的示例代码，展示了创建、修改、删除和解析XML文档的功能。

import java.io.File;import java.io.FileWriter;import java.util.List;import org.dom4j.Document;import org.dom4j.DocumentHelper;import org.dom4j.Element;import org.dom4j.Node;import org.dom4j.io.OutputFormat;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;public class DOM4JDemo {    @Test    public void createXML() throws Exception {        Document document = DocumentHelper.createDocument();        Element root = document.addElement("hibernate-mapping");        Element classElement = root.addElement("class")                .addAttribute("name", "com.trs.User")                .addAttribute("table", "wcmuser");        classElement.addElement("property")                .addAttribute("name", "username")                .addText("admin");        classElement.addElement("property")                .addAttribute("name", "password")                .addText("123456");                OutputFormat format = OutputFormat.createPrettyPrint();        XMLWriter writer = new XMLWriter(new FileWriter("User.hbm.xml"), format);        writer.write(document);        writer.close();    }    @Test    public void updateXML() throws Exception {        SAXReader reader = new SAXReader();        Document document = reader.read(new File("User.hbm.xml"));        Node node = document.selectSingleNode("//hibernate-mapping/class/property[@name='password']");        node.setText("12345678");                OutputFormat format = OutputFormat.createPrettyPrint();        XMLWriter writer = new XMLWriter(new FileWriter("User.hbm.xml"), format);        writer.write(document);        writer.close();    }    @Test    public void deleteXml() throws Exception {        SAXReader reader = new SAXReader();        Document document = reader.read(new File("User.hbm.xml"));        Node node = document.selectSingleNode("//property[@name='password']");        node.getParent().remove(node);                OutputFormat format = OutputFormat.createPrettyPrint();        XMLWriter writer = new XMLWriter(new FileWriter("User.hbm.xml"), format);        writer.write(document);        writer.close();    }    @Test    public void parseXml() throws Exception {        SAXReader reader = new SAXReader();        Document document = reader.read(new File("User.hbm.xml"));        List
   
     nodes = document.selectNodes("//hibernate-mapping/class/property");        for (Node node : nodes) {            System.out.println(node.getName());            System.out.println(node.valueOf("@name"));            System.out.println(node.getText());        }    }}
   

生成的XML示例

   
       
            
     
      admin
             
     
      123456
         
    
   

dom4j是一个功能强大且易于使用的XML处理框架，适合在Java应用中进行XML操作。

转载地址：http://sxne.baihongyu.com/