Pull解析和生成XML

public class PullPersonService {
	public static List<Person> getPersons(InputStream inputStream) throws Exception{
		Person person = null;
		List<Person> list = null;
		
		XmlPullParser pullParser = Xml.newPullParser();	
		pullParser.setInput(inputStream, "UTF-8");
		int event = pullParser.getEventType();//触发第一个事件
		while (event != XmlPullParser.END_DOCUMENT) {
			switch (event) {
			case XmlPullParser.START_DOCUMENT:
				list = new ArrayList<Person>();
				break;
			case XmlPullParser.START_TAG:
				if("person".equals(pullParser.getName())){
					int id = Integer.valueOf(pullParser.getAttributeValue(0));
					person = new Person();
					person.setId(id);
				}
				if(person != null){
					if("name".equals(pullParser.getName())){
						person.setName(pullParser.nextText());
					}
					if("age".equals(pullParser.getName())){
						person.setAge(new Short(pullParser.nextText()));
						Log.i("TAG", person.toString());
					}
				}
				break;
			case XmlPullParser.END_TAG:
				if("person".equals(pullParser.getName())){
					list.add(person);
					person = null;
				}
				break;
			}
			event = pullParser.next();
		}
		return list;
	}
}

	public static void save(List<Person> list, OutputStream outputStream) 
			throws Exception{
		XmlSerializer serializer = Xml.newSerializer();//对象序列化
		serializer.setOutput(outputStream, "UTF-8");
		serializer.startDocument("UTF-8", true);
		serializer.startTag(null, "persons");
		for (Person person : list) {
			serializer.startTag(null, "person");
			serializer.attribute(null, "id", String.valueOf(person.getId()));
			
			serializer.startTag(null, "name");
			serializer.text(person.getName());
			serializer.endTag(null, "name");
			
			serializer.startTag(null, "age");
			serializer.text(String.valueOf(person.getAge()));
			serializer.endTag(null, "age");
			
			serializer.endTag(null, "person");
		}
		serializer.endTag(null, "persons");
		serializer.endDocument();
		outputStream.flush();
		outputStream.close();
	}