DOM的数据回写哪里错了怎么没有创建新的文件

Question

@Test

public void dome3() throws Exception {

DocumentBuilderFactory builderfactory = DocumentBuilderFactory

.newInstance();

DocumentBuilder builder = builderfactory.newDocumentBuilder();

Document document = builder.parse("person.xml");

TransformerFactory transformerfactory = TransformerFactory

.newInstance();

Transformer transformer = transformerfactory.newTransformer();

DOMSource domsource = new DOMSource(document);//domsource构造数据源

StreamResult result = new StreamResult(new File("persons.xml"));

transformer.transform(domsource, result);

}