Android XmlPullParser 方式解析 Xml 文档

<?xml version="1.0" encoding="utf-8"?>
<persons>
  <person id="1">
    <name>张三</name>
    <age>22</age>
  </person>
  <person id="2">
    <name>李四</name>
    <age>20</age>
  </person>
</persons>

import java.io.inputstream;
import java.io.outputstream;
import java.util.arraylist;
import java.util.list;
import org.xmlpull.v1.xmlpullparser;
import org.xmlpull.v1.xmlserializer;
import com.eboy.domain.person;
import android.util.xml;
 
public class personservice {
 public static list<person> getpersons(inputstream xml) throws exception {
  list<person> persons = null;
  person person = null;
  xmlpullparser pullparser = xml.newpullparser();
  pullparser.setinput(xml, "utf-8"); // 为pull解释器设置要解析的xml数据
  int event = pullparser.geteventtype();
 
  while (event != xmlpullparser.end_document) {
 
   switch (event) {
 
   case xmlpullparser.start_document:
    persons = 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 ("name".equals(pullparser.getname())) {
     string name = pullparser.nexttext();
     person.setname(name);
    }
    if ("age".equals(pullparser.getname())) {
     int age = integer.valueof(pullparser.nexttext());
     person.setage(age);
    }
    break;
 
   case xmlpullparser.end_tag:
    if ("person".equals(pullparser.getname())) {
     persons.add(person);
     person = null;
    }
    break;
 
   }
 
   event = pullparser.next();
  }
  return persons;
 }
 
 /**
  * 保存数据到xml文件中
  * @param persons
  * @param out
  * @throws exception
  */
 public static void save(list<person> persons, outputstream out) throws exception {
  xmlserializer serializer = xml.newserializer();
  serializer.setoutput(out, "utf-8");
  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().tostring());
   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();
  out.flush();
  out.close();
 }
}