16. serialization - (12) SerializationDemo ( 직렬화 )

package serialization;
 
import java.io.Serializable;
 
public class User implements Serializable {
    
    // 시리얼버전 아이디는 보통 1로 하는 편
    private static final long serialVersionUID = 1L;
    private int no;
    private String userId;
    private String password;
    private String tel;
    private String email;
    
    // transient : 취급하지 않음, 직렬화 대상에서 제외
    private transient UserGrade grade;
    
    public User () {
        
    }
 
    public User(int no, String userId, String password, String tel, String email) {
        super();
        this.no = no;
        this.userId = userId;
        this.password = password;
        this.tel = tel;
        this.email = email;
    }
 
    public int getNo() {
        return no;
    }
 
 
    public void setNo(int no) {
        this.no = no;
    }
 
 
    public String getUserId() {
        return userId;
    }
 
 
    public void setUserId(String userId) {
        this.userId = userId;
    }
 
 
    public String getPassword() {
        return password;
    }
 
 
    public void setPassword(String password) {
        this.password = password;
    }
 
 
    public String getTel() {
        return tel;
    }
 
 
    public void setTel(String tel) {
        this.tel = tel;
    }
 
 
    public String getEmail() {
        return email;
    }
 
    public void setEmail(String email) {
        this.email = email;
    }
    
    public UserGrade getGrade() {
        return grade;
    }
    
    public void setGrade(UserGrade grade) {
        this.grade = grade;
    }
    
}
 

package serialization;
 
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
 
public class SerializationDemo {
    
    public static void main(String[] args) throws FileNotFoundException, IOException {
        
        User user = new User();
        user.setNo(100);
        user.setUserId("hong");
        user.setPassword("zxcv1234");
        user.setTel("010-1234-5678");
        user.setEmail("hong@gmail.com");
        
        UserGrade grade = new UserGrade();
        grade.setGrade("VIP");
        grade.setPoint(24000);
        
        FileOutputStream fos = new FileOutputStream("c:/files/user.sav");
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        
        // user 참조변수가 참조하는 객체를 스트림으로 전송가능한 상태로 작성
        // 연결될 FileOutputStream으로 전송
        // FileOutputStream은 user.sav 파일로 출력됨
        oos.writeObject(user);
        
        oos.close();
    }
}
 

package serialization;
 
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInputStream;
 
public class DeserializationDemo {
    
    public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {
        
        FileInputStream fis = new FileInputStream("c:/files/user.sav");
        ObjectInputStream ois = new ObjectInputStream(fis);
        
        
        // 스트림으로 읽어온 직렬화된 객체의 정보를 바탕으로 User 객체 복원
        User user = (User) ois.readObject();
        
        System.out.println("번호 : " + user.getNo());
        System.out.println("아이디 : " + user.getUserId());
        System.out.println("비밀번호 : " + user.getPassword());
        System.out.println("전화번호 : " + user.getTel());
        System.out.println("이메일 : " + user.getEmail());
 
        
        ois.close();
    }
}