所有程序包的分层结构

程序包分层结构:

• com.holiday.constants,
• com.holiday.enums,
• com.holiday.utils

类分层结构

• java.lang.Object
  • com.holiday.utils.HolidayUtil
  • com.holiday.constants.VacationConstant
  • com.holiday.constants.WorkDayConstant

枚举分层结构

• java.lang.Object
  • java.lang.Enum<E> (implements java.lang.Comparable<T>, java.io.Serializable)
    • com.holiday.enums.HolidayEnum