JavaEE_SAX

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[ ] 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!