SAX解析XML文件

1.XML文件介绍

XML中的节点和startElement，endElement之间的对应关系

2.SAX解析XML文件

public class SAXForHandler extends DefaultHandler {
private String TAG = "SAXForHandler";
private List<Person> list;

@Override //在开始XML解析的时候调用
public void startDocument() throws SAXException {
list = new ArrayList<Person>();
}

private String pertag;
private Person person;
@Override //在开始解析某个结点的时候调用
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
if("person".equals(localName)){
for(int i = 0; i < attributes.getLength(); ++i){
person = new Person();
person.setId(Integer.parseInt(attributes.getValue(i)));
}
}
pertag = localName;
}

@Override //在获取结点中内容的时候调用
public void characters(char[] ch, int start, int length)
throws SAXException {
String data = new String(ch, start, length).trim();
if("name".equals(pertag)){
person.setName(data);
}else if ("age".equals(pertag)) {
person.setAge(new Short(data));
Log.i(TAG, person.toString());//打印输出person的信息
}
}

@Override //在完成解析某个结点的时候调用
public void endElement(String uri, String localName, String qName)
throws SAXException {
if("person".equals(localName)){
list.add(person);
person = null;
}
pertag = null;
}

@Override //在完成整个XML解析的时候调用
public void endDocument() throws SAXException {
}
}调用如下代码就可以让SAX解析XML文件
public void parseXMLWithSAX() throws Exception {
InputStream inputStream = getClass().getClassLoader().
getResourceAsStream("NewFile.xml");

SAXForHandler saxForHandler = new SAXForHandler();

SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
saxParser.parse(inputStream, saxForHandler);

inputStream.close();
}解析结果如下;