Java O/X 매퍼(Mapper)를 사용한 XML 마샬링(Marshalling) 방법

Java O/X(Object / XML)를 사용한 Unmarshaller 방법

package com.howtodoinjava.jaxb.examples.list;

import java.io.File;
import java.io.StringReader;
import java.util.ArrayList;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

public class MarshingTest
{
   static User userList = new User();
   static 
   {
      userList.setUserInfoList(new ArrayList<UserInfo>());
      
      UserInfo user = new UserInfo();
      user.setUserId(10001);
      user.setFirstName("Lokesh");
      user.setLastName("Gupta");
      user.setEmail("aaaa@korea.com");

      userList.getUserInfoList().add(user);

      UserInfo user2 = new UserInfo();
      user2.setUserId(20002);
      user2.setFirstName("Lokesh222");
      user2.setLastName("Gupta333");
      user2.setEmail("bbb@korea.com");

      userList.getUserInfoList().add(user2);

   }
   
   public static void main(String[] args) throws JAXBException 
   {
      marshalingExample();
      System.out.println("************************************************");
      unMarshalingExample();
   }

   private static void unMarshalingExample() throws JAXBException {
      JAXBContext jaxbContext = JAXBContext.newInstance(User.class);
      Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
      User user = (User) unmarshaller.unmarshal( new File("\\User\\we\\userList.xml") );
      /**
       * XML파일을 String 객체에서 가져오기 위해서는 StringReader를 이용한다
       **/
      String response = "<?xml version='1.0' encoding='UTF-8' standalone='yes'?>"
            +"<user>"
            +"<userInfoList>"
            +"<userId>11</userId>"
            +"<firstName>홍</firstName>"
            +"<lastName>길동</lastName>"
            +"<email>aaaa@korea.com</email>"
            +"</userInfoList>"
            +"<userInfoList>"
            +"<userId>22</userId>"
            +"<firstName>진</firstName>"
            +"<lastName>라면</lastName>"
            +"<email>bbb@korea.com</email>"
            +"</userInfoList>"
            +"</user>";
      StringReader sr = new StringReader(response.toString());
      User userStr = (User) unmarshaller.unmarshal(sr);

      System.out.println("XML 파일 Mapping 결과======================");
      for(UserInfo each : user.getUserInfoList())
      {
         System.out.println(each.getUserId());
         System.out.println(each.getFirstName());
      }
      System.out.println("String 객체 Mapping 결과======================");
      for(UserInfo each : userStr.getUserInfoList())
      {
         System.out.println(each.getUserId());
         System.out.println(each.getFirstName());
      }

   }

   private static void marshalingExample() throws JAXBException {
      JAXBContext jaxbContext = JAXBContext.newInstance(User.class);
      Marshaller marshaller = jaxbContext.createMarshaller();
 
      marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
 
      marshaller.marshal(userList, System.out);
      marshaller.marshal(userList, new File("\\User\\we\\userList.xml"));
   }
}