Question

struts做开发的时候action是继承Action方法还是ActionSupport方法

Answer 1

ActionSupport 是实现了Action接口的。你可以看看文档。
public class ActionSuppor textends Object implements Action, Validateable, ValidationAware, TextProvider, LocaleProvider, Serializable
Provides a default implementation for the most common actions. See the documentation for all the interfaces this class implements for more detailed information.
这是API文档里的。