pull解析也是事件驱动的，android中已经加入jar包,java使用时可以到官网加入jar包。
//xml文件
<?xml version="1.0" encoding="UTF-8"?>
<persons>
<person id="23">
<name>liming</name>
<age>30</age>
</person>
<person id="20">
<name>lixiangmei</name>
<age>25</age>
</person>
</persons>
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlSerializer;
import android.util.Xml;
import cn.itcast.domain.Person;
public class PULLPersonService {
/** pull生成XML文件 **/
public static void save(List<Person> persons, Writer writer)
throws Throwable {
XmlSerializer serializer = Xml.newSerializer();
serializer.setOutput(writer);
serializer.startDocument("UTF-8", true);
serializer.startTag(null, "persons");
for (Person person : persons) {
serializer.startTag(null, "person");
serializer.attribute(null, "id", person.getId().toString());
serializer.startTag(null, "name");
serializer.text(person.getName());
serializer.endTag(null, "name");
serializer.startTag(null, "age");
serializer.text(person.getAge().toString());
serializer.endTag(null, "age");
serializer.endTag(null, "person");
}
serializer.endTag(null, "persons");
serializer.endDocument();
writer.flush();
writer.close();
}
/** pull解析XML文件 **/
public static List<Person> getPersons(InputStream inStream)
throws Throwable {
List<Person> persons = null;
Person person = null;
XmlPullParser parser = Xml.newPullParser();
parser.setInput(inStream, "UTF-8");
int eventType = parser.getEventType();// 产生第一个事件
while (eventType != XmlPullParser.END_DOCUMENT) {// 只要不是文档结束事件
switch (eventType) {
case XmlPullParser.START_DOCUMENT:
persons = new ArrayList<Person>();
break;
case XmlPullParser.START_TAG:
String name = parser.getName();// 获取解析器当前指向的元素的名称
if ("person".equals(name)) {
person = new Person();
person.setId(new Integer(parser.getAttributeValue(0)));
}
if (person != null) {
if ("name".equals(name)) {
person.setName(parser.nextText());// 获取解析器当前指向元素的下一个文本节点的值
}
if ("age".equals(name)) {
person.setAge(new Short(parser.nextText()));
}
}
break;
case XmlPullParser.END_TAG:
if ("person".equals(parser.getName())) {
persons.add(person);
person = null;
}
break;
}
eventType = parser.next();
}
return persons;
}
}
与sax不同的是pull只要对先获得一个事件类型然后用switch判断只要判断Tag，并用nextText获得文本，用parser.next();循环。
