Java写入xml (1)

赵振江

Java代码创建XML文件

主要类 
DocumentBuilder、DocumentBuilderFactory、Document、TransformerFactory、Transformer、DOMSource、StreamResult

代码示例

CreateXml.java

package demo;

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
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.Element;

public class CreateXml {
    // 创建DocumentBuilder
    public static DocumentBuilder getDocumentBuilder() {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

        DocumentBuilder docb = null;
        try {
            docb = dbf.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return docb;
    }
    public static boolean create(){
        //获取DocumentBuilder 对象
        DocumentBuilder docb=getDocumentBuilder();
        //创建Document对象   w3c
        org.w3c.dom.Document doc=docb.newDocument();
        //设置document格式
        doc.setXmlStandalone(true);
        //创建子节点 
        //首先创建 根节点 
        Element MusicType =doc.createElement("MusicType");
        Element name=doc.createElement("music");
        Element pop=doc.createElement("pop");
        //设置 子节点 文本内容 
        name.setTextContent("民谣 ");
        //为某些子节点设置属性
        name.setAttribute("id", "1");
        pop.setTextContent("小众");
        //将目标 子节点 添加到目标根节点
//      MusicType.appendChild(name);
//      MusicType.appendChild(pop);
        name.appendChild(pop);
        MusicType.appendChild(name);
        //将根节点添加到xml docment里面去 
        doc.appendChild(MusicType);
        //创建 TransformerFactory
        TransformerFactory tff=TransformerFactory.newInstance();
        //创建Transformer对象 
        try {
            Transformer tf=tff.newTransformer();
            tf.setOutputProperty(OutputKeys.INDENT, "yes");
            tf.transform(new DOMSource(doc), new StreamResult(new File("music.xml")));
            return true;
        } catch (TransformerConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (TransformerException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return false;
    }



    public static void main(String[] args) {
        if(CreateXml.create())
            System.out.println("創建成功！");
        else
            System.out.println("創建失敗！");

    }

}

[执行成功后] 建议右键Refresh下自己的工程，会在工程的根目录下发现以下文件 
music.xml

<?xml version="1.0" encoding="UTF-8"?>
<MusicType>
<music id="1">民谣 <pop>小众</pop>
</music>
</MusicType>