Research on the realization of various levels of CNC machine tools

The realization of various levels of CNC machine system, database storage layer. The database uses the Oracle 9i relational database, and the model uses Power Designer design management. According to the designed model, the corresponding table is built in Oracle. Data persistence layer. The data persistence layer maps Java objects to database relationships, and the system calls Java objects to complete operations such as extracting, writing, modifying, and deleting related data. This layer uses Hibernate software to write some configuration files (hbm.xml file), Hibernate automatically completes the mapping between Java objects and database relationships.

Business logic layer. The system specifically implements the operation of this layer by calling the corresponding DAO of the database table, and the DAO then calls the corresponding Model of the database table to perform addition, deletion, and modification processing; at the same time, the data is returned to the presentation layer. Web presentation layer. Implemented by Struts' tag library + JSP program. Through the Struts configuration file Struts-Config-Input. In this system, the Web presentation layer accesses the data of the database in two ways: one is to access the corresponding database table by accessing the DAO of the database table; the other way is to access the database table through JDBC.

The data processing data processing is realized by using the Oracle stored procedure of the database storage layer to complete all the data processing processes, and the processed data is directly saved in the corresponding database. The corresponding stored procedure parameters are provided on the interface of the web presentation layer to call the corresponding stored procedure. The report data report is implemented using the open source Eclipse BIRT report engine, and the corresponding report template is built by the Eclipse plug-in. The report is then published to the web application for users to browse, download, and print. The design and implementation of the system are based on Spring technology, which makes the whole system clear; in the process of implementation, Spring can effectively organize and apply the objects of each layer; when the system needs to be reconstructed, the code rewriting amount will be greatly Reduced, which lays the foundation for future system maintainability and scalability.

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