How to resolve the issue of springboot not finding mapper?

If the Mapper cannot be found in Spring Boot, you can try the following solutions:

1. Check the location of the mapper interface: Ensure that the mapper interface is located within the Spring scanning path of the Spring Boot application. You can use the @MapperScan annotation or configure the mybatis.mapper-locations property in the application.properties file to specify the location of the mapper interface.
2. Check the naming conventions of the mapper interface: ensure that the naming conventions of the mapper interface comply with the requirements of MyBatis. Typically, the name of the mapper interface should be the same as the corresponding Mapper XML file and have the suffix “Mapper”.
3. Check the MyBatis configuration file to ensure that the Mapper scan path is correctly configured in the MyBatis configuration file (usually mybatis-config.xml). The element can be used to specify the location of the mapper interface.
4. Check if the dependencies are correctly imported: Make sure that MyBatis and related dependencies are properly imported in the pom.xml file. You can use Maven or Gradle to manage dependencies.
5. Check the database connection configuration: Verify that the database connection configuration is correct and that the database service is running properly.

If none of the above methods work, you can try regenerating the Mapper interface. You can use MyBatis code generation tools such as MyBatis Generator or MyBatis Plus to generate the mapper interface and the corresponding Mapper XML file.