Pull解析器

1，

package com.service;

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.XmlPullParserFactory;
import org.xmlpull.v1.XmlSerializer;

import android.util.Xml;

import com.model.Person;

/**
 * 解析基类
 * @author HJ
 *
 */
public class BaseParser {
	
	/** Pull解析器解析XML文件数据
	 * @param xml 待解析数据以InputStream方式传入
	 * @return
	 * @throws Exception
	 */
	public List<Person> getPersons(InputStream xml)throws Exception{
		List<Person> persons = null;
		Person person = null;
		XmlPullParser pull = Xml.newPullParser();   
		//XmlPullParser pull = XmlPullParserFactory.newInstance().newPullParser();  //通过XMLPullParserFactory工厂类获取Pull解析器
		pull.setInput(xml, "UTF-8");//为pull解析器设置需要解析的xml数据
		int event = pull.getEventType();
		while(event!=XmlPullParser.END_DOCUMENT){
			switch (event) {	
			case XmlPullParser.START_DOCUMENT:
				persons = new ArrayList<Person>();
				break;
			case XmlPullParser.START_TAG:
				if ("person".equals(pull.getName())) {
					person = new Person();
					String IDcard = pull.getAttributeValue(0);
					person.setIDCard(IDcard);
				}
				if ("name".equals(pull.getName())) {
					String name = pull.nextText();
					person.setName(name);
				} 
				if ("sex".equals(pull.getName())) {
					String sex = pull.nextText();
					person.setSex(sex);
				}
				if ("address".equals(pull.getName())) {
					String address = pull.nextText();
					person.setAddress(address);
				}
				break;
			case XmlPullParser.END_TAG:
				if ("person".equals(pull.getName())) {
					persons.add(person);
					person = null;
				}
				break;
			}
			
			event = pull.next();
		}
		return persons;
	}
	/**
	 * 对象方式保存数据到XML文件
	 * @param persons 待保存数据集合
	 * @param out 输出流
	 * @throws Exception
	 */
	public void saveToXML(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,"IDCard", person.getIDCard());
			//name 节点
			serializer.startTag(null,"name");
			serializer.text(person.getName());
			serializer.endTag(null, "name");
			//sex 节点
			serializer.startTag(null, "sex");
			serializer.text(person.getSex());
			serializer.endTag(null, "sex");
			//address 节点
			serializer.startTag(null, "address");
			serializer.text(person.getAddress());
			serializer.endTag(null, "address");
			
			serializer.endTag(null, "person");
		}
		serializer.endTag(null,"persons");
		serializer.endDocument();
		out.flush();
		out.close();
	}
	//
}

 2，persons.xml

<?xml version="1.0" encoding="UTF-8"?>
<persons>
    <person IDcard="215x">
        <name>Mr.Chiang</name>
        <sex>Gentleman</sex>
        <address>China</address>
    </person>
    <person IDcard="9527">
        <name>Mrs.Chen</name>
        <sex>Lady</sex>
        <address>France</address>
    </person>
</persons>

 3，测试类

	package com.emolay.test;
	
	import java.io.File;
	import java.io.FileOutputStream;
	import java.io.InputStream;
	import java.util.List;
	
	import com.model.Person;
	import com.service.BaseParser;
	
	import android.test.AndroidTestCase;
	import android.util.Log;
	
	public class BaseParserTest extends AndroidTestCase {
		private static final String TAG = "BaseParserTest";
	
		/**
		 * test getPersons method
		 * 
		 * @throws Exception
		 */
		public void testGetPersons() throws Exception {
			InputStream xml = this.getClass().getClassLoader()
					.getResourceAsStream("persons.xml");
			BaseParser baseParser = new BaseParser();
			List<Person> persons = baseParser.getPersons(xml);
			for (Person p : persons) {
				Log.i(TAG, p.getIDCard());
			}
		}
	
		/**
		 * test saveToXML method
		 * 
		 * @throws Exception
		 */
		public void testSaveToXML() throws Exception {
			InputStream xml = this.getClass().getClassLoader()
					.getResourceAsStream("persons.xml");
			BaseParser baseParser = new BaseParser();
			List<Person> persons = baseParser.getPersons(xml);
			File fileXML = new File(getContext().getFilesDir(), "NewPersons.xml");
			FileOutputStream out = new FileOutputStream(fileXML);
			baseParser.saveToXML(persons, out);
		}
	}