Android使用pull解析器解析和生成xml

来源：互联网发布：软件需求变更管理编辑：程序博客网时间：2024/05/18 13:42

现有如下格式的xml文件：

<?xml version="1.0" encoding="UTF-8"?><persons><person id="23"><name>liming</name><age>30</age></person><person id="20"><name>zhangxiaoxiao</name><age>25</age></person></persons>

1.要解析这个xml文件，首先创建一个javabean:

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;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}@Overridepublic String toString() {return "Person [id=" + id + ", name=" + name + ", age=" + age + "]";}public Person(Integer id, String name, Integer age) {this.id = id;this.name = name;this.age = age;}public Person(){}}

2.创建解析和生成xml文件的程序

public class PersonService {/** * 获取数据 * @param xml * @return * @throws Exception */public static List<Person> getPersons(InputStream xml) throws Exception{List<Person> persons = null;Person person = null;XmlPullParser pullParser = Xml.newPullParser();pullParser.setInput(xml, "UTF-8");//为Pull解析器设置要解析的XML数据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("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);person = null;}break;}event = pullParser.next();}return persons;}/** * 保存数据 * @param persons 数据 * @param out 输出方向 * @throws Exception */public static void save(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, "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();out.flush();out.close();}}

3.在activity中测试程序

public void testPersons() throws Exception{InputStream xml = this.getClass().getClassLoader().getResourceAsStream("person.xml");List<Person> persons = PersonService.getPersons(xml);for(Person person : persons){Log.i(TAG, person.toString());}}public void testSave() throws Exception{List<Person> persons = new ArrayList<Person>();persons.add(new Person(43, "zhangxx", 80));persons.add(new Person(12, "lili", 20));persons.add(new Person(78, "xiaoxiao", 8));// <包>/filesFile xmlFile = new File(getContext().getFilesDir(), "itcast.xml");FileOutputStream outStream = new FileOutputStream(xmlFile);PersonService.save(persons, outStream);}

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