What’s New in MyBatis-Plus 4.0? Key Features and Update Log Explained

MyBatis-Plus is an enhancement toolkit for MyBatis that simplifies CRUD operations by injecting single‑table SQL during XML configuration loading, aiming to improve development productivity.

In 2022 the project set a goal to refactor to version 4.0, and it has been listed among the OSC most popular software for five consecutive years, thanking supporters and wishing a happy New Year.

Demo samples are available at https://gitee.com/baomidou/mybatis-plus-samples and documentation at https://baomidou.com/.

Update Log

Upgrade MyBatis to 3.5.9

Upgrade jsqlparser to 4.3

Add removal of Mapper‑related cache, support dynamic injection of Mapper via GroovyClassLoader

Add hook function for dynamic table names, https://github.com/baomidou/mybatis-plus/pull/3965

Optimize DefaultSqlInjector adjustments

Refactor ReflectionKit: change field‑>field to Function.identity()

BaseMapper adds new method exist Fix issue where lowercase “from” in sysbase prevented correct index retrieval

Add ability to obtain Mapper via entity class:

BaseMapper<Entity> mapper = SqlHelper.getMapper(Entity.class);

Optimize injection method byId

Fix multi‑tenant right join bug, https://gitee.com/baomidou/mybatis-plus/issues/I4FP6E, https://github.com/baomidou/mybatis-plus/pull/4035

Optimize custom injection method names, https://github.com/baomidou/mybatis-plus/pull/4159

Add support for SAP HANA in‑memory database

Add SimpleQuery toolbar query

Modify SQL injection validation utility code

Organize usage of string constants

Upgrade license‑gradle‑plugin version

Custom injection method name optimization (incompatible)

Overload columnsToString method to allow subclass adjustments

Fix et judgment logic, https://gitee.com/baomidou/mybatis-plus/issues/I4L4XV

Logical delete byId now supports conversion to entity delete fill