DBIO
DBIO is a resource that performs processing on the data of the DB, and consists of a Java interface (.java) that defines method declarations, and a mapper (.dbio) file that defines configurations for SQL, parameter binding, result mapping, and so on. In batch, large volumes of data are generally retrieved and processed, and operations such as repeatedly inserting or updating data are performed; therefore, it provides functions to process these more effectively, improve performance, and use system resources such as memory more efficiently.