Android 采用pull生成XML数据

/*
有些时候，我们需要生成一个XML文件，生成XML文件的方法有很多，如：可以只使用一个StringBuilder组拼XML内容，然后把内容写入到文件中；或者使用DOM API生成XML文件，或者也可以使用pull解析器生成XML文件，这里推荐大家使用Pull解析器。
使用Pull解析器生成一个与itcast.xml文件内容相同的myitcast.xml文件，代码在本页下方备注
使用代码如下（生成XML文件）：
File xmlFile = new File("myitcast.xml");
FileOutputStream outStream = new FileOutputStream(xmlFile);
OutputStreamWriter outStreamWriter = new OutputStreamWriter(outStream, "UTF-8");
BufferedWriter writer = new BufferedWriter(outStreamWriter);
writeXML(persons, writer);
writer.flush();
writer.close();
如果只想得到生成的xml字符串内容，可以使用StringWriter：
StringWriter writer = new StringWriter();
writeXML(persons, writer);
String content = writer.toString();
*/ 


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<?xml version="1.0" encoding="UTF-8"?> 
<persons> 
    <person id="23"> 
        <name>zhangsan</name> 
        <age>25</age> 
    </person> 
    <person id="20"> 
        <name>lisi</name> 
        <age>28</age> 
    </person> 
</person 

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package com.zyq.voo; 
public class Person 
{ 
     
    private Integer id; 
    private String name; 
    private Short age; 
     
    public Person() 
    { 
         
    } 
     
    public Person(Integer id, String name, Short age) 
    { 
        super(); 
        this.id = id; 
        this.name = name; 
        this.age = age; 
    } 
    public Integer getId() 
    { 
        return id; 
    } 
    public void setId(Integer id) 
    { 
        this.id = id; 
    } 
    public String getName() 
    { 
        return name; 
    } 
    public void setName(String name) 
    { 
        this.name = name; 
    } 
    public Short getAge() 
    { 
        return age; 
    } 
    public void setAge(Short age) 
    { 
        this.age = age; 
    } 
    @Override 
    public String toString() 
    { 
        return "Person [id=" + id + ", name=" + name + ", age=" + age + "]"; 
    } 
} 

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<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
      package="com.zyq.xml" 
      android:versionCode="1" 
      android:versionName="1.0"> 
    <application android:icon="@drawable/icon" android:label="@string/app_name"> 
    <uses-library android:name="android.test.runner" /> 
        <activity android:name=".MainActivity" 
                  android:label="@string/app_name"> 
            <intent-filter> 
                <action android:name="android.intent.action.MAIN" /> 
                <category android:name="android.intent.category.LAUNCHER" /> 
            </intent-filter> 
        </activity> 
    </application> 
    <uses-sdk android:minSdkVersion="8" /> 
    <instrumentation android:name="android.test.InstrumentationTestRunner" 
    android:targetPackage="com.zyq.xml" android:label="Tests for My App" /> 
     
</manifest>  

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package com.zyq.xml; 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.InputStream; 
import java.util.ArrayList; 
import java.util.List; 
import com.zyq.service.DOMPersonService; 
import com.zyq.service.PullBuildXMLService; 
import com.zyq.service.PullPersonService; 
import com.zyq.service.SAXPersonService; 
import com.zyq.voo.Person; 
import android.test.AndroidTestCase; 
import android.util.Log; 
public class PersonServiceTest extends AndroidTestCase 
{ 
    private static final String TAG="PersonServiceTest"; 
    /**
     * 测试 SAX解析XML数据
     * @throws Throwable
     */ 
    public void testSAX() throws Throwable 
    { 
        SAXPersonService personService=new SAXPersonService(); 
        InputStream inputStream=this.getClass().getClassLoader().getResourceAsStream("person.xml"); 
        List<Person> persons=personService.getPersons(inputStream); 
        for(Person person : persons) 
        { 
            Log.i(TAG, person.toString()); 
        } 
    } 
    /**
     * 测试 DOM解析XML数据
     * @throws Throwable
     */ 
    public void testDOM() throws Throwable 
    { 
        DOMPersonService personService=new DOMPersonService(); 
        InputStream inputStream=this.getClass().getClassLoader().getResourceAsStream("person.xml"); 
        List<Person> persons=personService.getPersons(inputStream); 
        for(Person person : persons) 
        { 
            Log.i(TAG, person.toString()); 
        } 
    } 
    /**
     * 测试 PULL解析XML数据
     * @throws Throwable
     */ 
    public void testPull() throws Throwable 
    { 
        PullPersonService personService=new PullPersonService(); 
        InputStream inputStream=this.getClass().getClassLoader().getResourceAsStream("person.xml"); 
        List<Person> persons=personService.getPersons(inputStream); 
        for(Person person : persons) 
        { 
            Log.i(TAG, person.toString()); 
        } 
    } 
     
    public void testPullBuildXML() throws Throwable 
    { 
        List<Person> persons=new ArrayList<Person>(); 
        persons.add(new Person(1001,"张三",(short)30)); 
        persons.add(new Person(1002,"李四",(short)18)); 
        persons.add(new Person(1003,"王二麻子",(short)21)); 
        persons.add(new Person(1004,"朱大",(short)25)); 
        persons.add(new Person(1005,"林一",(short)20)); 
         
        File file=new File(this.getContext().getFilesDir(),"zyq.xml"); 
        FileOutputStream outputStream=new FileOutputStream(file); 
        PullBuildXMLService service=new PullBuildXMLService(); 
        service.buildXML(persons, outputStream); 
    } 
} 

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package com.zyq.service; 
import java.io.OutputStream; 
import java.util.List; 
import org.xmlpull.v1.XmlSerializer; 
import android.util.Xml; 
import com.zyq.voo.Person; 
/**
* 采用PULL  生成XML数据
* @author Administrator
*
*/ 
public class PullBuildXMLService 
{ 
    /**
     * 
     * @param persons
     * @param outputStream
     * @throws Exception
     */ 
    public void buildXML(List<Person> persons,OutputStream outputStream) throws Exception 
    { 
        XmlSerializer serializer=Xml.newSerializer(); 
        serializer.setOutput(outputStream, "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()); 
            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(); 
        outputStream.close(); 
    } 
}