Hibernate枚举映射 [英] Hibernate Enumeration Mapping

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？
 
 <在 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，使用修改后的版本此处  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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