如何在Java中将XML内容写入字符串？

Question

我正在创建一个自定义XML文档。但我不希望XML作为文件可用，但我希望它在系统剪贴板中以字符串形式提供，以便我可以手动粘贴到现有文件。

我正在使用转换器将XML编写为：

TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);

StringWriter writer = new StringWriter();
transformer.transform(source, new StreamResult(writer));
String output = writer.toString();

但我在这里得到一个空指针异常。

transformer.transform(source, new StreamResult(writer));

你能帮帮我吗。

Answer 1

检查

TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(doc), new StreamResult(writer));
String output = writer.getBuffer().toString().replaceAll("\n|\r", "");

来自here