isDev();

1. JAVA -> XML   (JAXB)
2. JAXB -> JSON  (Jersey)
3. JAVA -> XML   (XStream)
4. JAVA -> JSON  (XStream)

1. 맛보기
// Person.java public class Person {     private String userid;     private String username;     private String email;     private Date regdate;         public Person() {         this.userid = "alseom";         this.username = "알썸";         this.email = "alseom@alseom.co.kr";         this.regdate = new Date();     } } // Main.java public class Test {         public static void main(String[] args) {         //XStream xstream = new XStream(new JettisonMappedXmlDriver());         XStream xstream = new XStream(new JsonHierarchicalStreamDriver() {             public HierarchicalStreamWriter createWriter(Writer writer) {                 return new JsonWriter(writer, JsonWriter.DROP_ROOT_MODE);             }         });         xstream.setMode(XStream.NO_REFERENCES);         xstream.alias("Person", Person.class);         xstream.toXML(new Person());     } }
{
  "userid": "alseom",
  "username": "알썸",
  "email": "alseom@alseom.co.kr",
  "regdate": "2009-11-26 17:58:00.671 KST"
}

참고
http://blog.openframework.or.kr/51
http://vicki.tistory.com/36
http://xstream.codehaus.org/json-tutorial.html
http://gyumee.egloos.com/1296932
http://bluesky.springnote.com/pages/375546
http://www.ksug.org/91