Introduction to iBATIS

The Framework That Became MyBatis

iBATIS was an open source Java persistence framework created by Clinton Begin in 2002. It introduced a then-novel idea: keep your SQL under your control in XML files, and let the framework map inputs and outputs to Java objects. It was developed as an Apache Incubator project and reached a large enterprise following, especially in banking and government systems.

Why iBATIS Was Popular

• Explicit SQL: developers wrote every statement, so nothing was hidden or auto-generated.
• XML mappings: SQL lived next to parameter and result maps.
• Small footprint: much lighter than full ORMs.
• Stored procedure friendly: excellent support for legacy database logic.

The Name Change

In 2010 the project left Apache and was renamed MyBatis. The concepts, XML files and community carried over, and MyBatis 3 is the direct descendant of iBATIS 2.x.

Why Learn iBATIS Today

• Huge volumes of legacy code still run on iBATIS.
• Understanding iBATIS makes migrating to MyBatis mechanical, not frightening.
• The dynamic SQL concepts you meet here appear again in MyBatis.

Key Points

• iBATIS is the original SQL-first XML persistence framework.
• It was an Apache project before becoming MyBatis.
• Every iBATIS skill translates directly to MyBatis.
• Legacy maintenance is the main reason to know it now.