What is the usage of MyBatis Generator?

MyBatis Generator is a tool used to automatically generate MyBatis persistence layer code. It can create entity classes, Mapper interfaces, and Mapper XML files based on the database table structure.

The following steps are required to use MyBatis Generator:

1. Configuration generator: Create an XML configuration file specifying database connection information, generated code path, generated code type, etc.
2. Define data table mapping: Configure the database table information in the XML configuration file that corresponds to the generated code, including table name and primary key field.
3. Setting generation rules: Configure the rules for generating code in the XML configuration file, such as the package name for the generated entity classes and the package name for the generated Mapper interfaces.
4. Run the generator: Develop a Java program that calls the API provided by MyBatis Generator, passing the path of the XML configuration file, and execute the code generation operation.
5. Check the generated results: the generator will automatically create code files based on the rules in the configuration file, and save them in the specified path. You can view the generated entity class, Mapper interface, and Mapper XML file.

Using MyBatis Generator, developers can reduce the amount of repetitive manual work involved in writing persistent layer code, thereby increasing development efficiency. The generated code also follows the best practices of MyBatis and can be directly used in the project.