java创建xml结构的数据

JAVA

import java.io.File;
import java.io.StringWriter;

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 XMLCreator {
    public void create() {
        //创建一个新的 DocumentBuilderFactory，
        //使用静态方法调用 newInstance()方法，创建一个新的实例
        DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
        
        try {
            DocumentBuilder builder=factory.newDocumentBuilder();
            // 添加根标签: languages
            Element root=document.createElement("languages");
            // 设置根元素的属性的键值对
            root.setAttribute("category", "it");

            Element lan1=document.createElement("lan");
            lan1.setAttribute("id", "1");
            Element name1=document.createElement("name");
            // 设置标签文本值
            name1.setTextContent("Java");
            Element ide1=document.createElement("ide");
            ide1.setTextContent("Eclipse");

            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");

            Element lan3=document.createElement("lan");
            lan3.setAttribute("id", "3");
            Element name3=document.createElement("name");
            name3.setTextContent("C#");
            Element ide3=document.createElement("ide");
            ide3.setTextContent("Visual Studio");

            // 进行结点的组装
            lan1.appendChild(name1);
            lan1.appendChild(ide1);
            lan2.appendChild(name2);
            lan2.appendChild(ide2);
            lan3.appendChild(name3);
            lan3.appendChild(ide3);
            root.appendChild(lan1);
            root.appendChild(lan2);
            root.appendChild(lan3);
            document.appendChild(root);
            
            TransformerFactory transformerFactory=TransformerFactory.newInstance();
            // 创建一个Transformer, 用于将xml数据转为其他格式 
            Transformer transformer=transformerFactory.newTransformer();
            StringWriter writer=new StringWriter();
            // 将xml数据写入writer
            transformer.transform(new DOMSource(document), new StreamResult(writer));

            // 可以直接得到writer的String数据
            System.out.println(writer.toString());
            
            // 也可以转换成文件，第二个参数的参数传入文件对象
            transformer.transform(new DOMSource(document), new StreamResult(new File("languages.xml")));
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (TransformerConfigurationException e) {
            e.printStackTrace();
        } catch (TransformerException e) {
            e.printStackTrace();
        }
    }
}

参考