feat: 숙소 예약 번호 생성 유틸 클래스 구현

OrderCodeGenerator 유틸 클래스 구현

src/main/java/kr/co/fastcampus/yanabada/common/utils/OrderCodeGenerator.java

@@ -0,0 +1,28 @@
+package kr.co.fastcampus.yanabada.common.utils;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.UUID;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class OrderCodeGenerator {
+
+    private static final int RANDOM_CODE_LENGTH = 12;
+    private static final String DATE_PATTERN = "yyMMdd";
+
+    public static String generate() {
+        return generateDateCode(LocalDate.now()) + generateRandomCode(RANDOM_CODE_LENGTH);
+    }
+
+    private static String generateDateCode(LocalDate date) {
+        return date.format(DateTimeFormatter.ofPattern(DATE_PATTERN));
+    }
+
+    private static String generateRandomCode(int length) {
+        String uuid = UUID.randomUUID().toString();
+
+        return uuid.substring(uuid.length() - length);
+    }
+}