两种解析方式:
dom4j 和 sax
解析思想:
book2.xml
<?xml version="1.0" encoding="UTF-8"?><书架><书><书名>JAVA</书名><作者>XXXXXX</作者><售价>23333</售价></书><书><书名>ANDROID</书名><作者>XXXXXX</作者><售价>23333</售价></书> </书架>
利用Sax解析book2.xml文件
public class SaxDemo {public static void main(String[] args) throws Exception {// 获取解析器工厂SAXParserFactory factory = SAXParserFactory.newInstance();// 通过工厂来获取sax解析器SAXParser parser = factory.newSAXParser();// 获取读取器XMLReader reader = parser.getXMLReader();// 注册事件处理器reader.setContentHandler(new MyContentHandler1());// 解析xmlreader.parse("book2.xml");}}class MyContentHandler1 implements ContentHandler {@Overridepublic void startDocument() throws SAXException {System.out.println("文档解析开始");}@Overridepublic void startElement(String uri, String localName, String qName,Attributes atts) throws SAXException {System.out.println("发现开始标签…" + qName);}@Overridepublic void characters(char[] ch, int start, int length)throws SAXException {System.out.println(new String(ch, start, length));}@Overridepublic void endElement(String uri, String localName, String qName)throws SAXException {System.out.println("发现结束标签…" + qName);}@Overridepublic void endDocument() throws SAXException {System.out.println("文档解析结束");}/********************************************************************/@Overridepublic void setDocumentLocator(Locator locator) {// TODO Auto-generated method stub}@Overridepublic void startPrefixMapping(String prefix, String uri)throws SAXException {// TODO Auto-generated method stub}@Overridepublic void endPrefixMapping(String prefix) throws SAXException {// TODO Auto-generated method stub}@Overridepublic void ignorableWhitespace(char[] ch, int start, int length)throws SAXException {// TODO Auto-generated method stub}@Overridepublic void processingInstruction(String target, String data)throws SAXException {// TODO Auto-generated method stub}@Overridepublic void skippedEntity(String name) throws SAXException {// TODO Auto-generated method stub}}
解析结果:
这样的结果是将整个xml文档都解析出来了,如何获得文档中的某一个标签体呢?
获得第二本书的书名 ,也就是ANDROID
public class SaxDemo {public static void main(String[] args) throws Exception {// 获取解析器工厂SAXParserFactory factory = SAXParserFactory.newInstance();// 通过工厂来获取sax解析器SAXParser parser = factory.newSAXParser();// 获取读取器XMLReader reader = parser.getXMLReader();// 注册事件处理器reader.setContentHandler(new MyContentHandler2());// 解析xmlreader.parse("book2.xml");}}class MyContentHandler2 extends DefaultHandler {private String name = null;int count = 0;@Overridepublic void startElement(String uri, String localName, String qName,Attributes attributes) throws SAXException {this.name = qName;}@Overridepublic void characters(char[] ch, int start, int length)throws SAXException {if ("书名".equals(name) && count++ == 1) {System.out.println(new String(ch, start, length));}}@Overridepublic void endElement(String uri, String localName, String qName)throws SAXException {name = null;}}
结果:
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发现一种久违的感动。