JavaEE_SAX

来源：互联网发布：安卓备份软件数据编辑：程序博客网时间：2024/05/03 19:04

There are knowledge about SAX with parser JavaEE.

1.SAX (Simple API for Xml) Its a greate parser about JavaEE and XML.

2. SupInterface : org.xml.sax

!1. ContentHandler : this is etends SAX packge

              void startDocument()              void endDocument()              void startElement(String uri, String localName, String qName, Attributes atts)              void endElement(String uri, String localName, String qName)              void characters(char&#91; &#93; ch, int start, int length)

   !2.DTDHandler:      this is in SAX packge too , about all DTD in xml

             void startDocumevoid notationDecl(String name, String publicId, String systemId) nt()             void unparsedEntityDecl(String name, String publicId, String systemId, String notationName)

!3.EntityResolver: body serach of xml

             public InputSource resolveEntity(String publicId, String systemId)

!4.ErrorHandler : hander exception when happend problem.

          void error(SAXParseException exception)          void fatalError(SAXParseException exception)          void warning(SAXParseException exception)

!5. DefaultHandler : its implements other four interface , so i support this interface to use in project.

         import org.xml.sax.*;         import org.xml.sax.helpers.DefaultHandler;         public class TestDefaultHandler extends DefaultHandler{         public void startDocument() throws SAXException{         System.out.println(""); }         public void endDocument() throws SAXException{         System.out.println("解析完成！"); }         public void startElement(String uri, String localName, String qName,         Attributes atts) throws SAXException {         System.out.println("："+qName);         }         public void endElement(String uri, String localName, String qName)         throws SAXException{         System.out.println("对"+qName+"的");      }}

!6.XMLReader : its the must be interface in SAX2 in xml java.

<span style="font-size:14px;">        import org.xml.sax.*;        import org.xml.sax.helpers.*;        public class TestXMLReader{        public TestXMLReader(){          try{        XMLReader reader = XMLReaderFactory.createXMLReader(        "org.apache.xerces.parsers.SAXParser");          System.out.println("Success");       //MyContentHandler implements ContentHandleri interface 的类       reader.setContentHandler(new MyContentHandler());       reader.setDTDHandler(new MyDTDHandler());       //对test.xml          reader.parse("test.xml");           System.out.println("");       }catch(SAXException e){e.printStackTrace();}</span>   }}

NOTE :
1. create XMLReader from default system
XMLReader reader = XMLReaderFactory.createXMLReader();

2.create XMl Reader

XMLReader reader = XMLReaderFactory.createXMLReader(

"org.apache.xerces.parsers.SAXParser");

3.create SAX Parser

SAXParserFactory spFactory = SAXParserFactory.newInstance();

SAXParser sParser = spFactory.newSAXParser();

Iparhan_Java 2016-6-23 GoodLuck!

1 0