问题描述
我有一个旧数据库表，为简单起见，看起来像：
表格地址{
varchar line1
varchar line2
varchar line3
varchar（1）deliveryline
}
对 deliveryline 有一个检查约束，保证它具有值'1，'2'或'3'。
这看起来很适合在hibernate中进行枚举。我有一个像这样的代表地址表的实体：
public class Address {
String line1;
String line2;
String line3;
DeliveryLine deliveryLine;
$ b我通常使用 @Enumerated（EnumType.STRING） 在映射枚举时，但是这种策略在这里不起作用。例如：
public enum DeliveryLine {
1,2,3
}
这不能编译，因为数据库（1,2,3）不是有效的Java标识符。
有没有一种直接的方法可以在hibernate中强制映射？
GenericEnumUserType 看看 GenericEnumUserType .htmlrel =nofollow noreferrer> hibernate.org （在灵活的解决方案下）
如果您使用Hibernate 4，使用修改后的版本 p>
I have a legacy database table that, for simplicity sake looks like:
table address{
varchar line1
varchar line2
varchar line3
varchar(1) deliveryline
}
There is a check constraint on deliveryline guaranteeing it has the values '1,'2', or '3'.
This seems like a good candidate for enumeration in hibernate. I have an entity that looks like this representing the Address table:
public class Address{
String line1;
String line2;
String line3;
DeliveryLine deliveryLine;
}
I normally use @Enumerated(EnumType.STRING) on when mapping enums, but that strategy does not work here. For example:
public enum DeliveryLine { 1,2,3} This does not compile since the valid values in the database (1,2,3) are not valid Java Identifiers.
Is there a straightforward way to coerce this mapping in hibernate?
解决方案 Look at GenericEnumUserType described at hibernate.org (Under "Flexible solution")
If you're using Hibernate 4 you'll have to use a modified version as discussed here
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