使用SAX解析XML文件

关于使用SAX解析XML文件也没什么要说明的，直接上代码吧。

关键如下：

public class PersonHandler extends DefaultHandler {
	private String preTAG;
	private List<PersonInfo> personList;
	private PersonInfo per;

	public PersonHandler() {
		super();
	}

	public PersonHandler(List<PersonInfo> personList) {
		super();
		this.personList = personList;
	}

	public void startElement(String uri, String localName, String qName,
			Attributes attributes) throws SAXException {
		preTAG = localName;
		if ("person".equals(localName)) {
			per = new PersonInfo();
			per.setId(new Integer(attributes.getValue(0)));
		}
		super.startElement(uri, localName, qName, attributes);
	}

	public void endElement(String uri, String localName, String qName)
			throws SAXException {
		preTAG = "";
		if ("person".equals(localName)) {
			personList.add(per);
		}
		super.endElement(uri, localName, qName);
	}

	public void characters(char[] ch, int start, int length)
			throws SAXException {
		if ("name".equals(preTAG)) {
			per.setName(new String(ch, start, length));
		} else if ("age".equals(preTAG)) {
			per.setAge("" + Integer.parseInt(new String(ch, start, length)));
		}
		super.characters(ch, start, length);
	}

	public List<PersonInfo> getPersonList() {
		return personList;
	}

	public void setPersonList(List<PersonInfo> personList) {
		this.personList = personList;
	}
}

这里需要一个辅助类：

public class PersonInfo {

	private Integer id;
	private String name;
	private String age;

	public PersonInfo() {

	}

	public PersonInfo(Integer id, String name, String age) {
		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 String getAge() {
		return age;
	}

	public void setAge(String age) {
		this.age = age;
	}

}

主界面Activity入口如下：

public class SAXActivity extends Activity {
	Button btn;
	ListView listView;
	List<String> list = new ArrayList<String>();

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		btn = (Button) findViewById(R.id.sax_button);
		listView = (ListView) findViewById(R.id.lv);
		btn.setOnClickListener(new OnClickListener() {
			public void onClick(View arg0) {
				List<PersonInfo> persons = parserXMl();
				for (Iterator iterator = persons.iterator(); iterator.hasNext();) {
					PersonInfo person = (PersonInfo) iterator.next();
					list.add(String.valueOf("ID：" + person.getId()) + " 姓名： "
							+ person.getName() + " 年龄： " + person.getAge());
				}
				ArrayAdapter<String> adapter = new ArrayAdapter<String>(
						getApplicationContext(),
						android.R.layout.simple_list_item_1, list);
				listView.setAdapter(adapter);
			}
		});
	}

	private List<PersonInfo> parserXMl() {
		List<PersonInfo> persons = new ArrayList<PersonInfo>();
		PersonInfo person = null;
		try {
			// 创建解析器
			SAXParserFactory sax = SAXParserFactory.newInstance();
			XMLReader reader = sax.newSAXParser().getXMLReader();
			// 为reader设置内容处理器
			reader.setContentHandler(new PersonHandler(persons));
			// 开始解析文件
			reader.parse(new InputSource(getResources().openRawResource(R.raw.person)));
			// 循环保存解析内容到persons
			for (Iterator iterator = persons.iterator(); iterator.hasNext();) {
				person = (PersonInfo) persons.iterator();
			}
			persons.add(person);
		} catch (Exception e) {
		}
		return persons;
	}
}

解析结果如下：