如何在Java中向XML输出添加回车符

Question

在Java中,如何在生成的XML文件中输出回车符,以便所有内容都不在一行上？

DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
Document doc = docBuilder.newDocument();
Element root = doc.createElement("requests");
doc.appendChild(root);
root.appendChild(request);

TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File(file));
transformer.transform(source, result);

上面的代码创建了一个XML文件,但都在一行上.

Answer 1

transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");

第一行添加缩进,第二次设置缩进值.

Answer 2

这应该解决问题.

transformer.setOutputProperty(OutputKeys.INDENT, "yes");