Bank App 만들기 - 간단한 유틸 클래스 만들기

 

시간, 금액에 대한 포맷 적용하기

 

package com.tenco.bank.utils;

import java.sql.Timestamp;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;

public abstract class ValueFormatter {

	// 시간 포맷
	public String timestampToString(Timestamp timestamp) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		return sdf.format(timestamp);
	}
	
	public String formatKoreanWon(Long amount) {
		DecimalFormat df = new DecimalFormat();
		String formatNumber = df.format(amount);
		return formatNumber + "원";
	}
	
}

 

package com.tenco.bank.repository.model;

import java.sql.Timestamp;

import org.springframework.http.HttpStatus;

import com.tenco.bank.handler.exception.DataDeliveryException;
import com.tenco.bank.utils.Define;
import com.tenco.bank.utils.ValueFormatter;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
@ToString
public class Account extends ValueFormatter{

	private Integer id;
	private String number;
	private String password;
	private Long balance;
	private Integer userId;
	private Timestamp createdAt;
	
	// 출금 기능
	public void withdraw(Long amount) {
		// 방어적 코드
		
		this.balance -= amount;
	}
	
	// 입금 기능
	public void deposit(Long amount) {
		this.balance += amount;
	}
	
	// 패스워드 체크 기능
	public void checkPassword(String password) {
		// false == false 일때, 결과값은 true
		if(this.password.equals(password) == false) { 
			throw new DataDeliveryException(Define.FAIL_ACCOUNT_PASSWROD, HttpStatus.BAD_REQUEST);
		}
	}
	
	// 잔액 여부 확인 기능
	public void checkBalance(Long amount) {
		if(this.balance < amount ) {
			throw new DataDeliveryException(Define.LACK_Of_BALANCE, HttpStatus.BAD_REQUEST);
		}
	}
	
	
	// 계좌 소유자 확인 기능 - 세션 값과 account id를 비교
	public void checkOwner(Integer principalId) {
		if(this.userId != principalId) {
			throw new DataDeliveryException(Define.NOT_ACCOUNT_OWNER, HttpStatus.BAD_REQUEST);
		}
	}
}