SAX是一种占用内存少且解析速度快的解析器，它采用的是事件启动，它不需要解析完整个文档，而是按照内容顺序 看文档某个部分是否符合xml语法，如果符合就触发相应的事件，所谓的事件就是些回调方法（callback）,这些方法 定义在ContentHandler中，下面是其主要方法：
package mars.xml; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class MyContentHandler extends DefaultHandler { String hisname, address, money, sex, status; String tagName; public void startDocument() throws SAXException { System.out.println("````````begin````````"); } public void endDocument() throws SAXException { System.out.println("````````end````````"); } public void startElement(String namespaceURI, String localName, String qName, Attributes attr) throws SAXException { tagName = localName; if (localName.equals("worker")) { //获取标签的全部属性 for (int i = 0; i < attr.getLength(); i++) { System.out.println(attr.getLocalName(i) + "=" + attr.getValue(i)); } } } public void endElement(String namespaceURI, String localName, String qName) throws SAXException { //在workr标签解析完之后，会打印出所有得到的数据 tagName = ""; if (localName.equals("worker")) { this.printout(); } } public void characters(char[] ch, int start, int length) throws SAXException { if (tagName.equals("name")) hisname = new String(ch, start, length); else if (tagName.equals("sex")) sex = new String(ch, start, length); else if (tagName.equals("status")) status = new String(ch, start, length); else if (tagName.equals("address")) address = new String(ch, start, length); else if (tagName.equals("money")) money = new String(ch, start, length); } private void printout() { System.out.print("name: "); System.out.println(hisname); System.out.print("sex: "); System.out.println(sex); System.out.print("status: "); System.out.println(status); System.out.print("address: "); System.out.println(address); System.out.print("money: "); System.out.println(money); System.out.println(); } }
