如何解析XML

public static void main(String[] args) throws Exception {  File file = new File("data.xml");  documentBuilder builder = documentBuilderFactory.newInstance().newdocumentBuilder(); //if you are using this pre for blackberry xml parsing  builder.setCoalescing(true);  document doc = builder.parse(file);  NodeList nodes = doc.getElementsByTagName("topic");  for (int i = 0; i < nodes.getLength(); i++) {    Element element = (Element) nodes.item(i);    NodeList title = element.getElementsByTagName("title");    Element line = (Element) title.item(0);    System.out.println("Title: " + getCharacterDataFromElement(line));  }}public static String getCharacterDataFromElement(Element e) {  Node child = e.getFirstChild();  if (child instanceof CharacterData) {    CharacterData cd = (CharacterData) child;    return cd.getData();  }  return "";}

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