学步园

Service.java源码：

package com.sinaapp.ssun.service;</p> <p>import java.io.InputStream;<br /> import java.io.OutputStream;<br /> import java.util.*;</p> <p>import org.xmlpull.v1.XmlPullParser;<br /> import org.xmlpull.v1.XmlPullParserFactory;<br /> import org.xmlpull.v1.XmlSerializer;</p> <p>import android.util.Xml;</p> <p>import com.sinaapp.ssun.domain.Person;</p> <p>public class Service {<br /> /**<br /> * 获取XML文件中的数据<br /> * @param xml<br /> * @return<br /> * @throws Exception<br /> */<br /> public static List<Person> getPersons(InputStream xml) throws Exception {<br /> List<Person> persons = null;<br /> XmlPullParser parser = XmlPullParserFactory.newInstance()<br /> .newPullParser();<br /> // parser = Xml.newPullParser();<br /> parser.setInput(xml, "UTF-8");<br /> int event = parser.getEventType();<br /> Person p = null;<br /> while (event != XmlPullParser.END_DOCUMENT) {<br /> switch (event) {<br /> case XmlPullParser.START_DOCUMENT:<br /> persons = new ArrayList<Person>();<br /> break;<br /> case XmlPullParser.START_TAG:<br /> if("person".equals(parser.getName())){<br /> p = new Person();<br /> int id = Integer.parseInt(parser.getAttributeValue(0));<br /> p.setId(id);<br /> }<br /> if("name".equals(parser.getName())){<br /> String name = parser.nextText();<br /> p.setName(name);<br /> }<br /> if("age".equals(parser.getName())){<br /> int age = Integer.parseInt(parser.nextText());<br /> p.setAge(age);<br /> }<br /> break;<br /> case XmlPullParser.END_TAG:<br /> if("person".equals(parser.getName())){<br /> persons.add(p);<br /> p = null;<br /> }<br /> break;<br /> }<br /> event = parser.next();<br /> }<br /> return persons;<br /> }</p> <p> /**<br /> * 保存数据到XML文件中<br /> * @param persons<br /> * @param out<br /> * @throws Exception<br /> */<br /> public static void save(List<Person> persons , OutputStream out) throws Exception{<br /> XmlSerializer serializer = Xml.newSerializer();<br /> serializer.setOutput(out, "UTF-8");<br /> serializer.startDocument("UTF-8", true);<br /> serializer.startTag(null, "persons");<br /> for(Person p: persons){<br /> serializer.startTag(null, "person");<br /> serializer.attribute(null, "person", p.getId()+"");</p> <p> serializer.startTag(null, "name");<br /> serializer.text(p.getName());<br /> serializer.endTag(null, "name");</p> <p> serializer.startTag(null, "age");<br /> serializer.text(p.getAge()+"");<br /> serializer.endTag(null, "age");</p> <p> serializer.endTag(null, "person");<br /> }<br /> serializer.endTag(null, "persons");<br /> serializer.endDocument();<br /> out.flush();<br /> out.close();<br /> }<br /> }</p> <p>Person.java源码：

package com.sinaapp.ssun.domain;</p> <p>public class Person {<br /> private String name;<br /> private int age;<br /> private int id;</p> <p> public String getName() {<br /> return name;<br /> }<br /> public void setName(String name) {<br /> this.name = name;<br /> }<br /> public int getAge() {<br /> return age;<br /> }<br /> public void setAge(int age) {<br /> this.age = age;<br /> }<br /> public int getId() {<br /> return id;<br /> }<br /> public void setId(int id) {<br /> this.id = id;<br /> }</p> <p> public Person(String name, int age, int id) {<br /> this.name = name;<br /> this.age = age;<br /> this.id = id;<br /> }<br /> public Person() {<br /> super();<br /> }<br /> @Override<br /> public String toString() {<br /> return "Person [name=" + name + ", age=" + age + ", id=" + id + "]";<br /> }<br /> }<br />
text.xml文件：

<!--test.xml--><br /> <?xml version="1.0" encoding="UTF-8"?><!-- 开始文档语法 --><br /> <persons><br /> <person id="1"><br /> <name>ssun</name><br /> <age>19</age><br /> </person><br /> <person id="2"><br /> <name>cobe</name><br /> <age>24</age><br /> </person><br /> </persons>
单元测试TestService.java源码：

package com.sinaapp.ssun.test;</p> <p>import java.io.File;<br /> import java.io.FileNotFoundException;<br /> import java.io.FileOutputStream;<br /> import java.util.ArrayList;<br /> import java.util.List;</p> <p>import android.test.AndroidTestCase;<br /> import android.util.Log;</p> <p>import com.sinaapp.ssun.domain.Person;<br /> import com.sinaapp.ssun.service.Service;</p> <p>public class TestService extends AndroidTestCase {<br /> private final String Tag = "Test";</p> <p> public void testPersons() throws Exception{<br /> List<Person> persons = Service.getPersons(this.getClass().getClassLoader().getResourceAsStream("test.xml"));<br /> for(Person p : persons){<br /> Log.i(Tag, p.toString());<br /> }<br /> }</p> <p> public void testSave() throws Exception{<br /> List<Person> persons = new ArrayList<Person>();<br /> persons.add(new Person("www",19,23));<br /> persons.add(new Person("hhh",19,3));<br /> persons.add(new Person("qqq",19,24));<br /> persons.add(new Person("ooo",19,25));<br /> File file = new File(this.getContext().getFilesDir(),"test2.xml");<br /> FileOutputStream out = new FileOutputStream(file);<br /> Service.save(persons, out);<br /> }</p> <p>}<br />