java 해석 xml에서 자주 사용하는 몇 가지 방식 요약

 
  
 
  
 
  
 
  
   
  
  Giada De Laurentiis 
  
  2005 
  
  30.00 
  
   
  
    
  
    ccccc 
  
    
  
   
  
 
   
  

  
  J K. Rowling
  2005
  29.99
 
  

  
  James McGovern
  Per Bothner
  Kurt Cagle
  James Linn
  Vaidyanathan Nagarajan
  2003
  49.99
 
  

  
  Erik T. Ray
  2003
  39.95
 
  
 
 

 
  
package sort; 
  
import javax.xml.parsers.DocumentBuilder; 
  
import javax.xml.parsers.DocumentBuilderFactory; 
  
import org.w3c.dom.Document; 
  
public class D2 { 
  
 /** 
  
  *     DOM   
  
  * @param args 
  
  * @throws Exception 
  
  */ 
  
 public static void main(String[] args) throws Exception{ 
  
 
  
  DocumentBuilder sb =  DocumentBuilderFactory.newInstance().newDocumentBuilder(); 
  
 
  
  Document root = sb.parse(D2.class.getClassLoader().getResourceAsStream("NewFile.xml")); 
  
 
  
  System.out.println(root.getChildNodes().item(0).getNodeName()); 
  
 
  
 } 
  
} 
   
   
 

 
  
package sort; 
   
  
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
 
  
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
 
  
import com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl;
 
  
public class D {
 
  
 /**
  *   SAX  
  * @param args
  * @throws Exception
  */
 public static void main(String[] args) throws Exception {

  SAXParserFactory factory = SAXParserFactoryImpl.newInstance();
  SAXParser parser = factory.newSAXParser() ;
  parser.parse(D.class.getClassLoader().getResourceAsStream("NewFile.xml"), 
    new DefaultHandler(){
 
  
     @Override
     public void characters(char[] ch, int start, int length)
       throws SAXException {
      System.out.println("characters");
     }
 
  
     @Override
     public void endDocument() throws SAXException {
      // TODO Auto-generated method stub
      System.out.println("endDocument");
     }
 
  
     @Override
     public void endElement(String uri, String localName,
       String qName) throws SAXException {
      // TODO Auto-generated method stub
      System.out.println("endElement");
     }
 
  
     @Override
     public void startDocument() throws SAXException {
      // TODO Auto-generated method stub
      System.out.println("startDocument");
     }
 
  
     @Override
     public void startElement(String uri, String localName,
       String qName, Attributes attributes)
       throws SAXException {
      // TODO Auto-generated method stub
      System.out.println("startElement");
     }

  }) ;

  
 }

}
 
   
 

 
  
package sort; 
   
  
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
 
  
public class D3 {
 
  
 /**
  *   XMLStream  
  * @param args
  * @throws Exception
  */
 public static void main(String[] args) throws Exception {
 
  
  XMLInputFactory xmlFactor = XMLInputFactory.newFactory();
 
  
  XMLStreamReader reader = 
   xmlFactor.createXMLStreamReader(D3.class.getClassLoader().getResourceAsStream("NewFile.xml"));
  while(reader.hasNext()){
   int point = reader.next() ;
   switch(point){
   case XMLStreamReader.START_ELEMENT :
    System.out.println("start_element");
   case XMLStreamReader.END_ELEMENT :
    // do something...
   }
 
  
  }
 
  
 }
 
  
}
 
   
 

 
  
package sort; 
   
  
import org.dom4j.Document;
import org.dom4j.io.SAXReader;
 
  
/**
 *   DOM4j XPATH  XML (      jar  )
 * @author zhoufeng
 *
 */
public class D4 {

 public static void main(String[] args) throws Exception{

  SAXReader reader = new SAXReader() ;

  Document root = reader.read(D4.class.getClassLoader().getResourceAsStream("NewFile.xml"));

  /*      cc   */
  System.out.println(root.selectNodes("//cc").size());;

  /*     book  ，      author */
  System.out.println((root.selectNodes("//book[author]").size()));;

  /*     book  ，     category    */
  System.out.println((root.selectNodes("//book[@category]").size()));;

  /*     book  ，      author  James McGovern ，    category      WEB      price  */
  System.out.println(root.selectNodes("//book[author='James McGovern'][@category='WEB']/price").size());;

 }
 
  
}