What is MyBatis?

A SQL-First Persistence Framework

MyBatis is a Java persistence framework that keeps you in control of your SQL instead of hiding it behind a query language. You write the exact SQL you want, map its parameters and results to your objects, and let MyBatis handle JDBC plumbing: connections, statements, result sets and transactions.

MyBatis vs JPA/Hibernate

• JPA/Hibernate auto-generates SQL from entity mappings; great for simple CRUD, but complex queries often become awkward.
• MyBatis runs the SQL you write; perfect when performance, legacy databases or stored procedures dominate.
• MyBatis is lighter, has a shallower learning curve for SQL-fluent teams, and never surprises you with unexpected SQL.

Key MyBatis Concepts

• SqlSession: the main entry point, created by a SqlSessionFactory.
• Mapper interface: a Java interface whose methods map to SQL statements.
• XML mapper files: hold the SQL statements and result maps.
• Dynamic SQL: build WHERE clauses, foreach loops and more at runtime.

Where MyBatis Shines

• Projects with thousands of tuned SQL statements.
• Legacy schemas that do not fit ORM conventions.
• Teams that want explicit SQL and fast debugging.
• Read-heavy reporting and analytical queries.

Key Points

• MyBatis is SQL-first, not object-first.
• You write SQL; MyBatis does the JDBC plumbing.
• Mappers - interfaces plus XML - bind methods to statements.
• Pick it when Hibernate hides too much or produces slow SQL.