JDom 读写XML

Jdom 写入XML 文件:

package com.rui.jdom;

import java.io.FileOutputStream;
import java.io.FileWriter;

import org.jdom.Attribute;
import org.jdom.Comment;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;

/**
 * 写入XML文档
 */
public class JDomTest1 {
	
	public static void main(String[] args) throws Exception {
		// 构造文档
		Document document = new Document();
		
		Element root = new Element("root");
		
		document.addContent(root);
		
		// 增加注释
		Comment comment = new Comment("This is my comments");
		
		root.addContent(comment);
		
		
		// 增加子元素
		Element e = new Element("hello");
		
		// 增加属性
		e.setAttribute("google","www.google.com");
		
		root.addContent(e);
		
		Element e2 = new Element("world");
		
		Attribute attr = new Attribute("test", "haha");
		Attribute attr2 = new Attribute("test2","测试");
		
		// 方法链的编程风格 (method chain style)
		e2.setAttribute(attr).setAttribute(attr2)
			.setAttribute("x", "y").setAttribute("a","b")
			.setText("文本");
		
		e.addContent(e2);
		
		// 格式化XML文件
//		Format format = Format.getRawFormat();
		Format format = Format.getPrettyFormat();
		
		// 设置缩进
		format.setIndent("    "); 
		// 设置文件编码, 默认为UTF-8
//		format.setEncoding("UTF-8"); 
		
		// 输出文档
		XMLOutputter out = new XMLOutputter(format);
		
//		out.output(document, new FileOutputStream("jdom.xml"));
		out.output(document, new FileWriter("jdom.xml"));
	}

}

对应XML文件:

<?xml version="1.0" encoding="UTF-8"?>
<root>
    <!--This is my comments-->
    <hello google="www.google.com">
        <world test="haha" test2="测试" x="y" a="b">文本</world>
    </hello>
</root>

JDom 读写XML文件:

package com.rui.jdom;

import java.io.FileOutputStream;
import java.util.List;

import org.jdom.Attribute;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;

/**
 * 读入XML文档
 */
public class JDomTest2 {
	
	public static void main(String[] args) throws Exception {
		SAXBuilder builder = new SAXBuilder();
		
		Document doc =builder.build("jdom.xml");
		
		Element element = doc.getRootElement();
		
		System.out.println(element.getName());
		
		Element hello = element.getChild("hello");
		
		List list = hello.getAttributes();
		
		for(int i=0;i<list.size();i++){
			Attribute attr = (Attribute)list.get(i);
			String attrName = attr.getName();
			String attrValue = attr.getValue();
			
			System.out.println(attrName + "=" + attrValue);
		}
		
		Element world = hello.getChild("world");
		
		list = world.getAttributes();
		
		for(int i=0;i<list.size();i++){
			Attribute attr = (Attribute)list.get(i);
			String attrName = attr.getName();
			String attrValue = attr.getValue();
			
			System.out.println(attrName + "=" + attrValue);
		}
		
		hello.removeChild("world");
		
		XMLOutputter out = new XMLOutputter(Format.getPrettyFormat().setIndent("    "));
		
		out.output(doc, new FileOutputStream("jdom2.xml"));
		
		System.out.println(hello.getName());
		System.out.println(hello.getText());
		
		//不必写: System.exit(0); // 相当于: Runtime.getRuntime().exit(0);
	}

}

对应XML文件:

<?xml version="1.0" encoding="UTF-8"?>
<root>
    <!--This is my comments-->
    <hello google="www.google.com" />
</root>

项目如附件: