DAO Pattern Design Steps

1.DAO Full name is the data Access object, the database Access objects, the main function is used for data manipulation, in the standard development of the program in the schema belongs to the operation of the layer.

2. Partitioning architecture

Enterprise Tiered Architecture

Customer Tier: Because the B/s development framework is now used, it is generally accessed using a browser.

Display layers: Display of page effects using Jsp/servlet

Business layer: (Business object): Multiple atomic DAO operations are combined into one complete business logic.

Data Layer (DAO): Provides multiple atomic DAO operations, such as adding, modifying, deleting, and so on, all of which are atomic operations.

The 3.DAO design pattern consists of:

1. DAO Interface: interface of Method 2.  DAO implementation class: Interface implementation Class 3.  Entity class: Object 4. Database connection and Shutdown tool classes

DAO Pattern Design Steps