获得T-class

获得T.class

Class < T >  entityClass  =  (Class < T > ) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[ 0 ];

获得return T.class

private Type getReturnTye(Method method){
     return ((ParameterizedType)(method.getGenericReturnType())).getActualTypeArguments()[0];
}