JAXB

JAXB home page
JSR 222 (JAXB 2.0)
JAXB chapter of the Java EE 5 Tutorial
JDK 1.6 javax.xml.bind

import java.io.StringReader;
import java.io.StringWriter;
import java.util.Date;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;

public class Main {

  public static void main(String[] args) throws Exception {   
    Foo foo = new Foo();
    foo.fb = new FooBar();
    foo.fb.x = 2;
    foo.fb.y = 3;
    foo.fb.date = new Date();
    
    JAXBContext jc = JAXBContext.newInstance(Foo.class);    
    Marshaller marshaller = jc.createMarshaller();
    marshaller.setProperty("jaxb.formatted.output", true);    
    marshaller.marshal(foo, System.out);
    System.out.println();
    
    StringWriter sw = new StringWriter();
    sw.write("<foo><fb>");
    sw.write("<x>15</x>");
    sw.write("<date>2009-01-16T17:50:50.000+08:00</date>");
    sw.write("</fb></foo>");
    StringReader sr = new StringReader(sw.toString());    
    foo = (Foo)jc.createUnmarshaller().unmarshal(sr);
    System.out.println("x: " + foo.fb.x);
    System.out.println("date: " + foo.fb.date);
  }

}

@XmlRootElement
class Foo {
  @XmlElement
  FooBar fb;
}


@XmlType
class FooBar {
  @XmlElement
  int x;

  @XmlAttribute
  int y;
  
  @XmlElement
  Date date;
}
/*
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<foo>
    <fb y="3">
        <x>2</x>
        <date>2009-01-16T22:06:24.763+08:00</date>
    </fb>
</foo>

x: 15
date: Fri Jan 16 17:50:50 CST 2009
*/