Android中使用PULL方式解析XML文件深入介绍

<?xml version="1.0" encoding="UTF-8"?>
<people>
<person id="001">
<name>XY1</name>
<age>22</age>
</person>
<person id="002">
<name>XY2</name>
<age>22</age>
</person>
</people>

public class PersonService
{
/**
* 从XML文件中读取数据
*
* @param xml XML文件输入流
*/
public List<Person> getPeople(InputStream xml) throws Exception
{
List<Person> lst = null;
Person person = null;
// 获得pull解析器工厂
XmlPullParserFactory pullParserFactory = XmlPullParserFactory.newInstance();
//获取XmlPullParser的实例
XmlPullParser pullParser = pullParserFactory.newPullParser();
// 设置需要解析的XML数据
pullParser.setInput(xml, "UTF-8");
// 取得事件
int event = pullParser.getEventType();
// 若为解析到末尾
while (event != XmlPullParser.END_DOCUMENT) // 文档结束
{
// 节点名称
String nodeName = pullParser.getName();
switch (event)
{
case XmlPullParser.START_DOCUMENT: // 文档开始
lst = new ArrayList<Person>();
break;
case XmlPullParser.START_TAG: // 标签开始
if ("person".equals(nodeName))
{
String id = pullParser.getAttributeValue(0);
person = new Person();
person.setId(id);
}
if ("name".equals(nodeName))
{
String name = pullParser.nextText();
person.setName(name);
}
if ("age".equals(nodeName))
{
int age = Integer.valueOf(pullParser.nextText());
person.setAge(age);
}
break;
case XmlPullParser.END_TAG: // 标签结束
if ("person".equals(nodeName))
{
lst.add(person);
person = null;
}
break;
}
event = pullParser.next(); // 下一个标签
}
return lst;
}
}