java基础 创建xml文件

<span style="font-size:18px;">package com.demo;

import java.io.File;
import java.io.StringWriter;
import java.security.KeyStore.Builder;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class createxml {

	public static void main(String[] args) {

		try {
			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document document = builder.newDocument();
			
			//创建根节点
			Element root = document.createElement("languages");
			root.setAttribute("cat", "it");
			
			Element lan1 = document.createElement("lan");
			lan1.setAttribute("id", "1");
			Element name1 = document.createElement("name");
			name1.setTextContent("java");
			Element ide1 = document.createElement("ide");
			ide1.setTextContent("eclipse");
			//以lan1为父节点，加入name1和ide1子节点
			lan1.appendChild(name1);
			lan1.appendChild(ide1);
			
			Element lan2 = document.createElement("lan");
			lan2.setAttribute("id", "2");
			Element name2 = document.createElement("name");
			name2.setTextContent("Swift");
			Element ide2 = document.createElement("ide");
			ide2.setTextContent("Xcode");
			lan2.appendChild(name2);
			lan2.appendChild(ide2);
			
			Element lan3 = document.createElement("lan");
			lan3.setAttribute("id", "3");
			Element name3 = document.createElement("name");
			name1.setTextContent("C#");
			Element ide3 = document.createElement("ide");
			ide3.setTextContent("Visual Studio");
			lan3.appendChild(name3);
			lan3.appendChild(ide3);
			
			//以root为根节点加入三个lan子节点，再将root加入document.
			root.appendChild(lan1);
			root.appendChild(lan2);
			root.appendChild(lan3);
			document.appendChild(root);
			
			//-----------------------------------------------
			//以上为创建xml文件内容，下面需要将该内容生成xml文件，或者以其他方式保存
			
			TransformerFactory transformerFactory = TransformerFactory.newInstance();
			Transformer transformer = transformerFactory.newTransformer();
			StringWriter writer = new StringWriter();
			transformer.transform(new DOMSource(document), new StreamResult(writer));
			System.out.println(writer.toString());
			
                        //将创建的xml保存至项目路径下，运行后刷新项目即可看到
			transformer.transform(new DOMSource(document), new StreamResult(new File("languages.xml")));
			
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (TransformerConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (TransformerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}
</span>

控制台效果如下：

<?xml version="1.0" encoding="UTF-8" standalone="no"?><languages cat="it"><lan id="1"><name>C#</name><ide>eclipse</ide></lan><lan id="2"><name>Swift</name><ide>Xcode</ide></lan><lan id="3"><name/><ide>Visual Studio</ide></lan></languages>

提示：当然生成的xml文件是没有格式化的，你也可以打开生成的languages.xml文件使用快捷点Ctrl + i格式化