Castor...

Castor.. Apa lagi ini? Castor itu adalah cara atau library untuk membaca dan menulis XML. gampangannya XMLParser lah :D. Yaa mirip-mirip kayak SAX, DOM dll. :). Cara penggunaan Castor cukup simple sech.. tapi kita musti buat class - class yang diperlukan untuk menampung masing tag :D. contoh aja langsung ya.. kayak gini nech :)
Misal kita pengen punya file xml dg nama Customer.XML dan isinya kayak gini :)

    <customer id="0001”">
        <firstname>Achmad</firstname>
        <mi>Ali</mi>
        <lastname>Bastomi</lastname>
    </customer>

cara buatnya kayak gini :).

1. Bua Class untuk masing-masing Tag

  public class Customer {
        private String myID;
        private FirstName myFirstName;
        private MI myMI;
        private LastName myLastName;
        public void setID (String anID) {myID = anID;}
        public String getID(){return myID;}
        public void setFirstName(FirstName aFirstName){
              myFirstName = aFirstName;
        }
        public FirstName getFirstName(){return myFirstName;}
        public void setMI(MI aMI){
              myMI = aMI;
        }
        public MI getMI(){return myMI;}
        public void setLastName(LastName aLastName){
              myLastName = aLastName;
        }
        public LastName getLastName(){return myLastName;}
  }
  public class FirstName {
        private String myText;
        public void setText(String text){myText = text;}
        public String getText(){return myText;}
  }
  public class MI {
        private String myText;
        public void setText(String text){myText = text;}
        public String getText(){return myText;}
  }
  public class LastName {
        private String myText;
        public void setText(String text){myText = text;}
        public String getText(){return myText;}
  }

2. Untuk Menulis ke XMLnya buat program kayak gininech :)

    import org.exolab.castor.xml.*;
    import java.io.*;
    public class CastorTest{
          public static void main(String[] args){
                // Lets make our object model. First the pieces…
                Customer myCust = new Customer();
                FirstName myFN = new FirstName();
                myFN.setText("Fred");
                MI myMI = new MI();
                myMI.setText("B");
                LastName myLN = new LastName();
                myLN.setText("Scerbo");
                // Now, structure them
                myCust.setID("fbs0001");
                myCust.setFirstName(myFN);
                myCust.setMI(myMI);
                myCust.setLastName(myLN);
                // Now, "marshal" them into an XML structure of
                // Castor's choosing
                try {
                      // A stream to write the XML into
                      FileWriter out = new FileWriter("customer.xml");
                      // One method call! That’s it!
                      Marshaller.marshal(myCust, out);
                      out.close();
                } catch(Exception e) {
                      System.out.println("Exception: "+e.getMessage());
                }
          }
    }

3. Untuk Ngambil datanya kayak gini :)

   import org.exolab.castor.xml.*;
    import java.io.*;
    public class CastorTest2 {
      public static void main(String[] args) {
        Customer myCust = new Customer();
        try {
          FileReader in = new FileReader("customer.xml");
          myCust = (Customer)Unmarshaller.unmarshal(Customer.class, in);
        } catch (Exception e) {
          System.out.println("Exception: "+e.getMessage());
        }
        System.out.println("    Customer ID: " + myCust.getID());
        System.out.println("     First Name: " +
          myCust.getFirstName().getText());
        System.out.println(" Middle Initial: " + myCust.getMI().getText());
        System.out.println("      Last Name: " +
          myCust.getLastName().getText());
          }
    }