如何使用休眠将枚举值保存到DB?
我试图通过Hibernate用随机数据填充数据库表。
但是我的代码将不兼容的数据填充到表中(不完全不兼容它是在枚举中声明的此元素的索引,例如:at - 是第一个元素,它设置为适当的列它索引 - 0。但我想把或作为枚举或字符串)。ApartmentState
FREE
FREE
我不知道为什么会发生这种情况。
下面是代码片段:
private List<Apartment> generateApartments() {
for (int i = 1; i <= 3; i++) {
for (int j = 2; j <= 5; j++) {
Apartment apartment = new Apartment();
// fill apartment
apartment.setRoomName(generateRoomName());
apartment.setPricePerHour(generatePrice());
apartment.setApartmentState(FREE);
apartment.setRating(getDesiredRating(j));
apartment.setSleepPlaces(getDesiredPlaces(i));
apartment.setActive(true);
// save apartment
apartments.add(apartment);
}
}
return apartments;
}
private Apartment.SleepPlaces getDesiredPlaces(int i) {
switch (i) {
case 1:
return ONE_PLACE;
case 2:
return TWO_PLACES;
case 3:
return THREE_PLACES;
}
return ONE_PLACE;
}
private Apartment.StarRating getDesiredRating(int j) {
switch (j) {
case 2:
return TWO_STARS;
case 3:
return THREE_STARS;
case 4:
return FOUR_STARS;
case 5:
return FIVE_STARS;
}
return TWO_STARS;
}
我需要在表中填写一些枚举值,如评级(2,3,4)和睡眠场所(1,2..)。
但这会将一些错误的数据放入表中。
以下是工作台上的内容:
为什么它只放置索引,而不是字符串或枚举。
将来,我怎样才能以所需的价值恢复它。
以下是来自公寓类的片段:
@Entity
@Table(name = "Apartments")
public class Apartment extends AbstractEntity implements Comparable<Apartment> {
private Integer id;
private String roomName;
private Double pricePerHour;
private ApartmentState apartmentState;
private StarRating rating;
private SleepPlaces sleepPlaces;
private Boolean active;
public enum ApartmentState {
FREE, REQUESTED, BOOKED, LIVED, CLEANING, PROCESSING
}
public enum StarRating {
TWO_STARS("2 stars"), THREE_STARS("3 stars"), FOUR_STARS("4 stars"), FIVE_STARS("5 stars");
private String description;
private StarRating(String description) {
this.description = description;
}
public String getDescription() {
return description;
}
}
public enum SleepPlaces {
ONE_PLACE("1 person"), TWO_PLACES("2 persons"), THREE_PLACES("3 persons"), FOUR_PLACES("4 persons");
private String count;
private SleepPlaces(String count) {
this.count = count;
}
public String getCount() {
return count;
}
}
对我来说,最好的方法是将enum作为enum(可能在MySql工作台上)或作为字符串(以及use和来自Enum类)。name()
valueOf()
但是如何使用休眠来实现它。
如何解决这个麻烦?