java - Hibernate char 列枚举

Question

我将“性别”列作为 VARCHAR(1)/CHAR。 如何在不使用@Entity类的情况下将值“M”/“F”解析为具有值(MALE，FEMALE)的java枚举

@Column(name="gender")
private Character cGender;

并手动将其转换为枚举对象？

Answer 1

您需要提供自己的转换器:

@Convert(converter = GenderConverter.class)
@Column(name="gender")
private Gender gender;

然后实现

public class GenderConverter implements AttributeConverter<Gender, Character> {
    @Override
    public Character convertToDatabaseColumn(Gender from) {

        Character value = 'm';

        if (from == Gender.FEMALE) {
            value = 'f';
        }

        return value;
    }

    @Override
    public Gender convertToEntityAttribute(Character to) {
        Gender g = Gender.MALE;
        if ('f' == to)
            g = Gender.FEMALE;
        }
        return g;
    }
}