Pull解析xml，小实例

1 一个示例用的xml文件：person.xml

<?xml version="1.0" encoding="UTF-8"?>
<persons>
    <person id="111">
        <name>tom</name>
        <age>230</age>
    </person>
    <person id="222">
        <name>jerry</name>
        <age>233</age>
    </person>
</persons>

2 新建一个实体类：Person.java

package com.example.xml_saxparser;

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 Person( String name, Short age) {
        super();
        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 + "]";
    }
    

}

3 解析的关键类：PullParser

package com.example.xml_pullparser;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.annotation.SuppressLint;
import android.util.Xml;
import com.example.xml_saxparser.Person;

public class PullPaser {

    @SuppressLint("UseValueOf")
    public static List<Person> getPerson(InputStream in) throws Exception{
        Person person = null;
        List<Person> persons = null;
        XmlPullParser pullParser = Xml.newPullParser();
        pullParser.setInput(in, "UTF-8");
        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 = new Integer(pullParser.getAttributeValue(0));
                    person = new Person();
                    person.setId(id);
                }
                if(person!= null){
                    if("name".equals(pullParser.getName())){
                        person.setName(pullParser.nextText());
                    }
                    if("age".equals(pullParser.getName())){
                        person.setAge(new Short(pullParser.nextText()));
                    }
                }
                break;
            case XmlPullParser.END_TAG:
                if("person".equals(pullParser.getName())){
                    persons.add(person);
                    person = null;
                }
                break;
            }
            event = pullParser.next();
        }
        return persons;
    }
}

4 单元测试Pull解析，看看效果吧。怎么单元测试，前面文章有说明。

package com.example.xml_pullparser;

import java.io.InputStream;
import java.util.List;

import android.test.AndroidTestCase;
import android.util.Log;

import com.example.xml_saxparser.MainActivity;
import com.example.xml_saxparser.Person;

public class PullJUnitTest extends AndroidTestCase {
    public void testPullgetPersons() throws Exception{
        InputStream in = MainActivity.class.getClassLoader().getResourceAsStream("person.xml");
        List<Person> persons = PullPaser.getPerson(in);
        in.close();
        for(Person p : persons){
            Log.i("Person", p.toString());
        }
    }

}