Why does Java Engineering add a biz Layer

Biz is the abbreviation of business, which is actually the control layer (the operational logic layer).
Explanation: The main function of the control layer is to coordinate the direct invocation and transformation of the model layer and view layer. The ability to effectively avoid requests for direct database content calls, while ignoring the logical processing of the part. In fact, Biz has a role as a server service, good communication between the upper and lower layers of the direct conversion, to avoid the model layer of business processing (code is too confusing, not conducive to maintenance).

Why does Java Engineering add a biz Layer