使用Dom4j对XML进行增删改查-优快云博客

本文详细介绍了如何使用Dom4j库对XML文件中的元素进行增加、删除、修改操作，包括创建XML文件、读取XML文件、遍历节点、添加或更新元素等基本步骤。

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使用Dom4j对XML进行增删改查非常简单，这里就不多说废话，下面上代码

package com.bird.dom4j; import java.io.FileOutputStream; import java.io.OutputStreamWriter; import java.util.List; import org.dom4j.Document; import org.dom4j.DocumentHelper; import org.dom4j.Element; import org.dom4j.io.OutputFormat; import org.dom4j.io.SAXReader; import org.dom4j.io.XMLWriter; /** * @use 使用Dom4j对指定标签增加内容 * @author Bird * */ public class DomAdd { @SuppressWarnings("unchecked") public static void add() throws Exception{ SAXReader reader = new SAXReader(); Document document = reader.read("d://book.xml"); Element book = document.getRootElement().element("书"); List list = book.elements(); Element price = DocumentHelper.createElement("售价"); price.setText("999元"); list.add(2, price); OutputFormat former =OutputFormat.createPrettyPrint();//设置格式化输出器 former.setEncoding("UTF-8"); XMLWriter writer = new XMLWriter(new OutputStreamWriter(new FileOutputStream("d://book.xml"),"UTF-8"),former); writer.write(document); writer.close(); } public static void delete() throws Exception{ SAXReader reader = new SAXReader(); Document document = reader.read("d://book.xml"); Element price = document.getRootElement().element("书").element("售价"); price.getParent().remove(price); OutputFormat format = OutputFormat.createPrettyPrint(); format.setEncoding("UTF-8"); XMLWriter writer = new XMLWriter(new FileOutputStream("d://book.xml"),format); writer.write(document); writer.close(); } public static void update() throws Exception{ SAXReader reader = new SAXReader(); Document document = reader.read("d://book.xml"); Element price = document.getRootElement().element("书").element("售价"); price.setText("10086元"); OutputFormat format = OutputFormat.createPrettyPrint(); format.setEncoding("UTF-8"); XMLWriter writer = new XMLWriter(new FileOutputStream("d://book.xml"),format); writer.write(document); writer.close(); } public static void main(String[] args) throws Exception{ // add(); // delete(); update(); } }