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What is Externalizable interface?
Externalizable is an interface which have two methods readExternal and writeExternal. These methods give you a control over the serialization mechanism.
Therefore if your class executes this interface, you can customize the serialization process by executing these methods.
The different types of actions in Struts are: ? DispatchAction ? LookupDispatchAction ? ForwardAction ? SwitchAction ? IncludeAction
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