android中pull解析xml和生成xml

一,用pull解析xml

1,将要解析的文件放到src下面,因为程序打包后,会自动将src的文件一起打包的.

person.xml内容:

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

开始解析xml

/**
	 * 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,并且按照utf-8编码进行读取
		int event = pullParser.getEventType();
		while (event != XmlPullParser.END_DOCUMENT) {
			switch (event) {
			case XmlPullParser.START_DOCUMENT:
				persons = new ArrayList<Person>();
				break;

			case XmlPullParser.START_TAG: // 开始标签
				if ("person".equals(pullParser.getName())) {
					int id = new Integer(pullParser.getAttributeValue(0));
					person = new Person();
					person.setId(id);
					System.out.println("获取的id是:" + id);
				}
				if ("name".equals(pullParser.getName())) {
					String name = pullParser.nextText();
					person.setName(name);
					System.out.println("获取的name是:" + name);
				}
				if ("age".equals(pullParser.getName())) {
					int age = new Integer(pullParser.nextText());
					person.setAge(age);
					System.out.println("获取的age是:" + age);
				}
				break;

			case XmlPullParser.END_TAG:// 结束标签时
				if ("person".equals(pullParser.getName())) {
					persons.add(person);
					person = null;
				}
				break;
			}
			event = pullParser.next();
		}
		return persons;
	}

测试:

	public void testPersons() throws Exception {
		InputStream xml = this.getClass().getClassLoader().getResourceAsStream(
				"person.xml");//将src下的xml写入
		List<Person> persons = PersonService.getPersons(xml);
		for (Person person : persons) {
			Log.i("解析xml的数据:", person.toString());
		}
	}

二,生成xml文件:

生成的实体类

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);//<?xml version='1.0' encoding='UTF-8' standalone='yes' ?>
		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();
	}

测试:

public void testSave() throws Exception {
		List<Person> persons = new ArrayList<Person>();
		persons.add(new Person(43, "zhangsan", 80));
		persons.add(new Person(12, "lisi", 20));
		persons.add(new Person(78, "wangwu", 8));
		// <包>/files
		File xmlFile = new File(getContext().getFilesDir(), "yjr.xml");
		FileOutputStream outStream = new FileOutputStream(xmlFile);
		PersonService.save(persons, outStream);
	}

生成的文件:

yjr.xml:将文件导出来

<?xml version='1.0' encoding='UTF-8' standalone='yes' ?>
<persons>
	<person id="43">
		<name>zhangsan</name>
		<age>80</age>
	</person>
	<person id="12">
		<name>lisi</name>
		<age>20</age>
	</person>
	<person id="78">
		<name>wangwu</name>
		<age>8</age>
	</person>
</persons>