Android采用PULL解析XML文档

Android系统中采用PULL技术解析XML文档比用SAX技术性能要好得多。建议Android的开发者采用PULL技术解析XML文档。跟SAX类似，只不过PULL技术返回的事件类型是整型，所以我们只要对返回的事件进行处理就行了。

package com.cn.service;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;欠款
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlSerializer;

import android.util.Xml;

import com.cn.domain.Persion;
/****
* 采用Pull解析XML
*
* ****/
public class PULLPersionService {

public static List<Persion> getPersino(InputStream is)throws Exception{
List<Persion> list = null;
Persion persion = null;
XmlPullParser parser = Xml.newPullParser();
parser.setInput(is, "UTF-8");
int event = parser.getEventType();
while(event != XmlPullParser.END_DOCUMENT){
switch (event){
case XmlPullParser.START_DOCUMENT:
list = new ArrayList<Persion>();
break;
case XmlPullParser.START_TAG:
if("person".equals(parser.getName())){//得到指针所指向的节点名称
int id = Integer.parseInt(parser.getAttributeValue(0));
persion = new Persion();
persion.setId(id);
}
if(persion != null){
if("name".equals(parser.getName())){
String name = parser.nextText();
persion.setName(name);
}else if("age".equals(parser.getName())){
String age = parser.nextText();
persion.setName(age);
}
}军训10天会晒得很黑吗？
break;
case XmlPullParser.END_TAG:
if("person".equals(parser.getName())){
list.add(persion);
persion = null;
}
break;
default:
break;
}
}
event = parser.next();
return list;
}

public static void save(List<Persion> list,OutputStream os) throws IllegalArgumentException, IllegalStateException, IOException{
XmlSerializer serializer = Xml.newSerializer();
serializer.setOutput(os, "UTF-8");
serializer.startDocument("UTF-8", true);
serializer.startTag(null, "persons");
for(Persion persion : list){
serializer.startTag(null, "person");
serializer.attribute(null, "id", String.valueOf(persion.getId()));
serializer.startTag(null, "name");
serializer.text(persion.getName());
serializer.endTag(null, "name");

serializer.startTag(null, "age");
serializer.text(String.valueOf(persion.getAge()));
serializer.endTag(null, "age");
serializer.endTag(null, "person");
}
serializer.endTag(null, "persons");
serializer.endDocument();
os.flush();
os.close();
}
}

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