在Hibernate注释上分配生成器类 [英] Assigned Generator Class on Hibernate Annotations

问题描述

Hibernate新手在这里。我正在研究一个简单的Hibernate映射文件。
当我使用xml方法时，我将生成器类设置为分配。
在分配一个员工ID之前必须检查某些逻辑，所以我不能自动生成
。

 < id name =idtype =stringcolumn =emp_id> 
< generator class =assigned> 
< / generator> 
< / id> 
  

但是我也在研究注释类型和注释，因为框架正在消失从
配置文件。但我找不到任何生成类型匹配指定的值

  public class Employee {
 String id; 
 @column（name =emp_id，unique = true）
 public String getID（）{
 return id; 
 
 
 
 
 
 
 $ b 
这是否意味着我不需要添加任何序列生成器注释何时分配？谢谢 
 
解决方案 
只需使用 @Id 注释，财产是你的实体的标识符。你不需要使用 @GeneratedValue 注释，因为我不认为你想让hibernate为你生成这个属性。 
  @Id 
字符串ID; 
  
 
Hibernate newbie here.  I am working on a simple Hibernate mapping file.
When I am using the xml approach, I set the generator class to assigned.
There are certain logic that must be checked before an employee id is assigned so I cant generate it
automatically.
<id name="id" type="string" column="emp_id">
        <generator class="assigned">
        </generator>
</id>
But I am also studying the annotation type and annotation seems to be in thing nowadays as frameworks are moving away from
configuration files.  But I cant find any generation type to match the assigned value 
public class Employee{
 String id; 
 @column(name="emp_id", unique=true)
 public String getID(){
  return id;
 }
}
Does this mean that I dont need to add any sequence generator annotation when it is assigned?  Thanks
解决方案
Just use the @Id annotation which lets you define which property is the identifier of your entity. You don't need to use the @GeneratedValue annotation because I don't think you want hibernate to generate this property for you. 
@Id
String id; 


                        
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