java还提供SAX和DOM用于解析XML

Android还集成了Pull解析器——推荐

 

package cn.itcast.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.XmlSerializer;import android.util.Xml;import cn.itcast.domain.Person;public class PersonService {        /**     * 读取数据     * @param xml     * @return     * @throws Exception     */    public static List
     
       getPersons(InputStream xml) throws Exception{        List
      
        persons = null;        Person person = null;                XmlPullParser pullparser = Xml.newPullParser();        pullparser.setInput(xml, "UTF-8");        int event = pullparser.getEventType();                while (event!=pullparser.END_DOCUMENT){            switch (event) {            case XmlPullParser.START_DOCUMENT:                //    数据初始化                persons = new ArrayList
       
        ();                break;            case XmlPullParser.START_TAG:                //    数据read                if ("person".equals(pullparser.getName())){                    int id = new Integer(pullparser.getAttributeValue(0));                    person = new Person();                    person.setId(id);                }                if ("name".equals(pullparser.getName())) {                    String name = pullparser.nextText();                    person.setName(name);                }                if ("age".equals(pullparser.getName())) {                    int age = new Integer(pullparser.nextText());                    person.setAge(age);                }                                break;            case XmlPullParser.END_TAG:                if ("person".equals(pullparser.getName())){                    persons.add(person);                }                break;            default:                break;            }                event = pullparser.next();        }        return persons;    }        /**     * 保存数据     * @param persons     * @param out     * @throws Exception     */    public static void savePersons(List
        
          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, "id", person.getId().toString());                        serializer.startTag(null, "name");            serializer.text(person.getName().toString());            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();        out.flush();        out.close();            }}
        
       
      
     

 

//　　单元测试

 

public class PersonServiceTest extends AndroidTestCase {        public void testPersons() throws Exception{        InputStream xml = this.getClass().getClassLoader().getResourceAsStream("person.xml");        List
     
       persons = PersonService.getPersons(xml);        for (Person person:persons){            Log.i("test111", person.toString());        }    }        public void testSave() throws Exception{        List
      
        persons = new ArrayList
       
        ();        persons.add(new Person(10, "10", 10));        persons.add(new Person(20, "20", 20));                File xml = new File(getContext().getFilesDir(), "itcast.xml");        FileOutputStream outputStream = new FileOutputStream(xml);         PersonService.savePersons(persons, outputStream);        outputStream.close();    }}
       
      
     

//　　数据结构

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