SAX解析XML文档

SAX（Sample APIs for XML）采用顺序访问XML文档的方式来解析。

 

public static void main(String[] args) throws Exception, SAXException {
		
		SAXParserFactory factory = SAXParserFactory.newInstance();
		
		SAXParser parser = factory.newSAXParser();
		
		parser.parse(new File("dom.xml"), new MyHandler());
		
		
	}

}


class MyHandler extends DefaultHandler{
	
	private Stack<String> stack = new Stack<String>();
	
	private String name;
	private String age;
	
	
	
	@Override
	public void startElement(String uri, String localName, String qName,
			Attributes attributes) throws SAXException {
		stack.push(qName);
		
		for(int i=0;i<attributes.getLength();i++){
			
			String attrName = attributes.getQName(i);
			
			String attrValue = attributes.getValue(i);
			
			System.out.println(attrName+":"+attrValue);
		}
	}
	
	@Override
	public void endElement(String uri, String localName, String qName)
			throws SAXException {
		
		stack.pop();
		
		if("student".equals(qName)){
			
			System.out.println("name:"+name);
			System.out.println("age:"+age);
		}
	}
	
	@Override
	public void characters(char[] ch, int start, int length)
			throws SAXException {
		String tag = stack.peek();
		if("name".equals(tag)){
			
			name = new String(ch,start,length);
		}else if("age".equals(tag)){
			
			age = new String(ch,start,length);
		}
	}