springboot MybatisSqlSessionFactoryBean

MybatisSqlSessionFactoryBean is a class provided by Spring Boot that helps to configure and create a MyBatis SqlSessionFactory instance. The SqlSessionFactory is responsible for creating and managing the SqlSession instances that are used to interact with the database.

MybatisSqlSessionFactoryBean extends the SqlSessionFactoryBean class and adds MyBatis-specific configuration options. It provides an easy way to configure MyBatis in a Spring Boot application.

To use MybatisSqlSessionFactoryBean, you need to do the following:

1. Add the MybatisSqlSessionFactoryBean dependency to your project.
2. Configure the data source for your application.
3. Create a MybatisSqlSessionFactoryBean instance with the configured data source.
4. Configure the MyBatis mapper XML files or Java interfaces.
5. Get the SqlSessionFactory instance from the MybatisSqlSessionFactoryBean.

Here is an example of configuring MybatisSqlSessionFactoryBean in a Spring Boot application:

@Configuration
@MapperScan("com.example.mapper")
public class MybatisConfig {

    @Bean
    public DataSource dataSource() {
        // configure and return data source
    }

    @Bean
    public MybatisSqlSessionFactoryBean sqlSessionFactory() throws Exception {
        MybatisSqlSessionFactoryBean sessionFactory = new MybatisSqlSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        return sessionFactory;
    }
}

In this example, the data source is configured in the dataSource() method, and the MyBatis mapper XML files are located in the classpath at "classpath:mapper/*.xml". The MybatisSqlSessionFactoryBean is created with the configured data source and mapper locations, and then returned as a bean.

The @MapperScan annotation is used to scan for MyBatis mapper interfaces in the specified package(s). Once the SqlSessionFactory has been created, it can be used to create SqlSession instances and interact with the database.