@Retention(value=RUNTIME)
@Target(value={TYPE,METHOD,FIELD,PARAMETER})
@Qualifier
public @interface DefaultMethodHandler
MethodHandler,
to make it be recognized by the framework as the default method handler.
The default method handler is to handle invocations of all methods that do not have
a specific method handler defined by Handler or MethodHandlerResolver.
There can only be one default method handler in the application.MethodHandler,
MethodHandlerResolver,
Handler