The online auto parts store system system to achieve specific data persistence layer in the data persistence layer, the entity class is an ordinary JavaBean, contains a number of attributes and their corresponding Getter and Setter methods, each business entity class and a database of data Corresponds to the table (may also take into account the need to increase or decrease some of the attributes corresponding to the table field).
Both implement the java.io.Serializable interface for serialization. Because the operation of the database is divided into four types of additions, deletions and changes, the system only needs to pay attention to the preparation of the corresponding methods when constructing the DAO operation layer, and at the same time pay attention to the versatility of these methods.
The system builds a DAO base class, encapsulates the above four operations, establishes a basic operation method, and declares that the save method is used to save data records and also to update records.
The delete method is used to delete the data distance. The load method is used to obtain the entity object information based on the object ID and object type.
After the establishment of specific DAO objects are inherited from this base class, automatically obtain the basic operating methods, to achieve the operation of the auto parts information database.
The system uses the good decoupling of Struts2 and ServletAPI, first develops the upper Action base class or interface, and then develops the corresponding Action implementation class for different business logics, inherits the base class or implements the interface, and adds or deletes the data persistence layer. The method of checking the operation (or the corresponding business logic code) is placed in an Action class to complete the related business operations.
Conclusion Through the design and development of the online auto parts mall system, Struts2 can use interceptors to capture request parameters and complete the analysis. At the same time, the idea of ​​control inversion and aspect-oriented programming is integrated, and a pluggable programming method is implemented. The tight coupling between Struts1 and Servlet API facilitates future code reuse and maintenance.
Combined with the application of AJAX technology, it improves response speed and enhances the customer experience. With the popularity of Struts2 technology, I believe that Struts2 will show its powerful features in more Web domains.
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