在Struts 2中绑定后更改参数

Question

我有一个动作，可以从用户那里接收一些参数（例如日期）。此操作产生许多不同的报告，因此它具有许多不同的方法。在每种方法之前，我都需要 调整
这些参数（将时间设置为午夜）。该prepare方法在绑定参数之前执行。是否有其他拦截器或其他允许我执行此操作的约定？

Answer 1

使用 <interceptor-ref name="paramsPrepareParamsStack"/>

<!-- An example of the params-prepare-params trick. This stack
    is exactly the same as the defaultStack, except that it
    includes one extra interceptor before the prepare interceptor:
    the params interceptor.

    This is useful for when you wish to apply parameters directly
     to an object that you wish to load externally (such as a DAO
     or database or service layer), but can't load that object
     until at least the ID parameter has been loaded. By loading
     the parameters twice, you can retrieve the object in the
     prepare() method, allowing the second params interceptor to
     apply the values on the object. -->

如果您使用的是 Convention Plugin，请立即 对其进行操作

@Action(value="action1", interceptorRefs=@InterceptorRef("paramsPrepareParamsStack"))