如何在Hibernate注释应用程序中外部化命名查询？ [英] How do I externalize named queries in a Hibernate annotations app?

问题描述

有没有办法将HQL命名查询外部化为外部文件。我有太多的命名查询，并且在我的实体类的头部使用 @NamedQueries 和 @NamedQuery 正在伤害。

有没有一种方法可以将多个文件外化？

解决方案

您可以将查询放入 package-info.java 类中，比如说，您的域对象的根包中。但是，您必须使用Hibernate自己的 @NamedQueries 和 @NamedQuery 注释，而不是来自 javax.persistence 。

示例 package-info.java file：

  @ org.hibernate.annotations.NamedQueries（{
 @ org.hibernate.annotations.NamedQuery （
 name =foo.findAllUsers，
 query =from Users）
}）
 
 package com.foo.domain; 
  

然后，您必须将该包添加到 AnnotationConfiguration 。我使用Spring，所以在这里设置 annonatedPackages 属性：

 < bean id =sessionFactory
 class =org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean> 
< property name =annotatedClasses> 
< list> 
 ... 
< / list> 
< / property> 
< property name =annotatedPackages> 
< list> 
<值> com.foo.domain< /值> 
< / list> 
< / property> 
  

您也可以将type和过滤相同文件中的定义。

Is there a way to externalize HQL named queries to an external file. I have too many named queries and using @NamedQueries and @NamedQuery at the head of my entities classes is hurting.

Is there a way to externalize to several files?

解决方案

You can put the queries into package-info.java class, in, say, root package of your domain objects. However, you must use Hibernate's own @NamedQueries and @NamedQuery annotations, rather than those from javax.persistence.

Example package-info.java file:

@org.hibernate.annotations.NamedQueries({
    @org.hibernate.annotations.NamedQuery(
        name = "foo.findAllUsers", 
        query="from Users") 
}) 

package com.foo.domain;

Then, you have to add the package to your AnnotationConfiguration. I use Spring, so there it's a matter of setting annonatedPackages property:

<bean id="sessionFactory" 
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="annotatedClasses">
      <list>
      ...
      </list>
</property>
<property name="annotatedPackages">
  <list>
      <value>com.foo.domain</value>
  </list>
</property>

You can also put type and filter definitions in the same file as well.

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