Question

ValidatorForm与DynaValidatorForm有何区别?

Answer 1

ValidatorForm与DynaValidatorForm有何区别?

The answer to this is in fact the difference between ActionForm and DynaActionForm.

在Stuts,人人都知道ActionForm阶级(因此,我不说哪里话)。但并非每个人都知道(或理解——我包括)。

DynaActionForms的思想是,你不为每种超文本形式设立表格,而是混为一谈(在休战卷中申报其财产、类型和违约)。所谓“妇科”,你知道......,但被证明是一些人所理解或使用的,并造成一些重大不利之处:

they act sort of like a Map so it has the same problems of maps, like retrieving data from it, you know, as an Object which you then have to cast. So you have casts everywhere;
compiler no longer notifies you when you screw something up like a name of a property for example, so compile errors turn into runtime errors;
the things are not really dynamic since you still have to restart the server after you "reconfigured" the properties in the struts-config.xml file (or else modifications won t be picked up);
code completion does not work on DynaActionForms, type safety sucks (we are not taking generics here) and there are other nuisances that I can t remember right now.

......好是,从Stuts的角度来看,你有两种主要形式处理: ActionForm and DynaActionForm (even if the DynaActionForm is in fact a subclass of ActionForm).

最后,ValidatorForm和DynaValidatorForm都是相同的,但适用于不同的“东北部”。