hibernate - Hibernate 映射一个 Map

Question

我如何在 Hibernate 中映射它：

 Map<Day, Double> dayCounter;

天是：

public enum Day {

    MONDAY,

    TUESDAY,

    WEDNESDAY,

    THURSDAY,

    FRIDAY;
}

Answer 1

就像是：

   @ElementCollection
   //define your collection table using @CollectionTable
   @MapKeyEnumerated(EnumType.STRING)
   @MapKeyColumn(name = "day")
   @Column(name = "count")
   private Map<Day, Double> dayCount;