Simple extraction techniques for the interface and basic functions of DAO layer in Javaweb

When the DAO layer writes the concrete implementation class, it extracts the DAO layer function into the interface, then implements the interface, implements the concrete method, and writes the specific function code.

Extraction

But this kind of extraction is not very friendly, from the diagram can be seen, each implementation class to write common additions and deletions to the method, this is to make the code stored again redundant, repeated code to write multiple times. At this point you need to consider the code to extract the deletion again, written in a class.

Extraction

Extracting the common code from the Basedaoimpl to improve the reusability of the code, specifying the generic type when the specific DAO calls the common method.

Simple extraction techniques for the interface and basic functions of DAO layer in Javaweb