这是一个有效的代码，只需添加缺少的导入。它使用SAX并更改
<name>user1</name>为
<name>user2</name>。如果弄清楚它是如何工作的，还可以阅读SAX
API，则可以对xml进行任何操作。请注意，在StAX诞生之前，SAX被认为是最高效的xml解析器。
public static void main(String[] args) throws Exception { String xml = "<users><user><name>user1</name></user></users>"; XMLReader xr = new XMLFilterImpl(XMLReaderFactory.createXMLReader()) { private String tagName = ""; @Override public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException { tagName = qName; super.startElement(uri, localName, qName, atts); } public void endElement(String uri, String localName, String qName) throws SAXException { tagName = ""; super.endElement(uri, localName, qName); } @Override public void characters(char[] ch, int start, int length) throws SAXException { if (tagName.equals("name")) { ch = "user2".toCharArray(); start = 0; length = ch.length; } super.characters(ch, start, length); } }; Source src = new SAXSource(xr, new InputSource(new StringReader(xml))); Result res = new StreamResult(System.out); TransformerFactory.newInstance().newTransformer().transform(src, res);}
