使用grails MVC时，一切都很好，因为我可以使用控制器访问域对象并在它们上调用CRUD和其他动态方法。但是，我想知道的是，有没有一种干净的方式来从Java做到 - 比如说服务层。例如，我可能想要开发一个报告框架，我需要使用域对象来访问数据库。
我希望问题很清楚。这应该是每个人在一个规模合理的项目中都必须面对的标准问题。
谢谢。解决方案org.codehaus.groovy.runtime.InvokerHelper使这个非常简单;看到这个邮件列表线程：
How can I use grails domain classes (which is in groovy) in service layer which is in Java/Spring.
When using the grails MVC, everything is fine as I can use controller to access domain objects and call CRUD and other dynamic methods on them. But, what I am wondering is is there a clean way to do it from Java - say the service layer. For example, I may want to develop a reporting framework where I need to use domain objects to access the DB.
I Hope the question is clear. This should be a standard problem that everybody must have faced in a reasonably sized project. I am just wondering how it is solved..maybe I am missing something here.
thanks.
org.codehaus.groovy.runtime.InvokerHelper makes this pretty straightforward; see this mailing list thread: http://grails.1312388.n4.nabble.com/Calling-Dynamic-Finders-on-Domain-Class-via-the-MetaClass-td1596496.html
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