使用DOM创建xml文件

public class CreateXML { public static void main(String[] args) {
DocumentBuilderFactory factory =DocumentBuilderFactory.newInstance();
try { DocumentBuilder builder=factory.newDocumentBuilder();
Document documnet= builder.newDocument();
Element root=documnet.createElement("languages");
root.setAttribute("cat", "it"); Element lan1=documnet.createElement("lan");
lan1.setAttribute("id", "1");
Element name1=documnet.createElement("name");
name1.setTextContent("java");
Element ide1=documnet.createElement("ide");
ide1.setTextContent("eclipse");
lan1.appendChild(name1);
lan1.appendChild(ide1); Element lan2=documnet.createElement("lan");
lan2.setAttribute("id", "2");
Element name2=documnet.createElement("name");
name2.setTextContent("c#");
Element ide2=documnet.createElement("ide");
ide2.setTextContent("visual studio");
lan2.appendChild(name2);
lan2.appendChild(ide2); Element lan3=documnet.createElement("lan");
lan3.setAttribute("id", "3");
Element name3=documnet.createElement("name");
name3.setTextContent("swift");
Element ide3=documnet.createElement("ide");
ide3.setTextContent("visual studio");
lan3.appendChild(name3);
lan3.appendChild(ide3); root.appendChild(lan1);
root.appendChild(lan2);
root.appendChild(lan3);
documnet.appendChild(root); //使用transformer将xml文档转换成其他格式
TransformerFactory tfactory=TransformerFactory.newInstance();
Transformer former=tfactory.newTransformer(); //将xml内容以字符串输出
StringWriter writer=new StringWriter();
former.transform(new DOMSource(documnet), new StreamResult(writer));
System.out.println(writer.toString()); //将xml内容保存为文件
former.transform(new DOMSource(documnet), new StreamResult(new File("newxml.xml")));
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (TransformerConfigurationException e) {
e.printStackTrace();
} catch (TransformerException e) {
e.printStackTrace();
} }}