Start by generating a new project using IntelliJ's Spring Initializr wizard. Choose the following dependencies: Spring Web, Thymeleaf, MySQL Driver, JDBC API, and MyBatis Framework. Finish the wizard and open the project in a new window.

Add database and MyBatis configuration in src/main/resources/application.properties:

spring.datasource.url=jdbc:mysql://localhost:3306/mydb?useSSL=false&serverTimezone=UTC
spring.datasource.username=dbuser
spring.datasource.password=dbpass
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.type-aliases-package=com.demo.myapp.model

In pom.xml,16 include the MyBatis Generator plugin inside the <build><plugins> section. The plugin needs a configuration file location:

<plugin>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-maven-plugin</artifactId>
    <version>1.4.2</version>
    <configuration>
        <configurationFile>src/main/resources/generator/generatorConfig.xml</configurationFile>
        <overwrite>true</overwrite>
        <verbose>true</verbose>
    </configuration>
</plugin>

Also ensure the Thymeleaf starter is16 present (already selected in the wizard).

Create the directory generator under src/main/resources and place a file named generatorConfig.xml inside it. Two approaches are common: placing generated mapper XML files directly in the Java source tree, or</2>placing them under resources. Below is a configuration for the second approach—mappers in resources/mapper:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <classPathEntry location="D:\libs\mysql-connector-java-8.0.30.jar"/>
    <context id="MySQLTables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/mydb"
                        userId="dbuser" password="dbpass"/>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <javaModelGenerator targetPackage="com.demo.myapp.model"
                            targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <sqlMapGenerator targetPackage="mapper"
                         targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.demo.myapp.mapper"
                             targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <table tableName="user_account" domainObjectName="UserAccount"
               enableCountByExample="false" enableUpdateByExample="false"
               enableDeleteByExample="false" enableSelectByExample="false"
               selectByExampleQueryId="false"/>
    </context>
</generatorConfiguration>

If you prefer to keep mapper XMLs alongside the Java interfaces (approach one), change <sqlMapGenerator targetProject="src/main/java" targetPackage="com.demo.myapp.mapper"/> and16 adjust mybatis.mapper-locations to16 scan the16 Java package.

To run the generator, create a Maven run configuration: Run → Edit Configurations → + → Maven. Set the Command line to:

mybatis-generator:generate

Give the configuration a name, e.g., GenerateEntities, and run it. Check the16 generated model, mapper interface, and XML files.

After generation, ensure that each mapper interface is annotated with @Mapper so Spring can discover it:

package com.demo.myapp.mapper;

import com.demo.myapp.model.UserAccount;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface UserAccountMapper {
    int deleteByPrimaryKey(Long id);
    int insert(UserAccount record);
    int insertSelective(UserAccount record);
    UserAccount selectByPrimaryKey(Long id);
    int updateByPrimaryKeySelective(UserAccount record);
    int updateByPrimaryKey(UserAccount record);
}

Alternatively,16 apply @MapperScan("com.demo.myapp.mapper") on the main application class or a configuration class.