从Java文档中获取xml字符串

它不是一个电话，而是：

TransformerFactory transfac = TransformerFactory.newInstance();Transformer trans = transfac.newTransformer();trans.setOutputProperty(OutputKeys.METHOD, "xml");trans.setOutputProperty(OutputKeys.INDENT, "yes");trans.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", Integer.toString(2));StringWriter sw = new StringWriter();StreamResult result = new StreamResult(sw);DOMSource source = new DOMSource(doc.getdocumentElement());trans.transform(source, result);String xmlString = sw.toString();

setOutputProperty方法使字符串输出更漂亮，因此可以将其取出。