配置pom.xml文件

<plugin>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-maven-plugin</artifactId>
    <version>1.4.0</version>
    <configuration>
        <configurationFile>src/main/resources/mybatis-generator.xml</configurationFile>
        <overwrite>true</overwrite>
    </configuration>
    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.28</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.4.0</version>
        </dependency>
    </dependencies>
</plugin>

编写mybatis-generate.xml

<?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>
    <context id="liuMysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">

        <!--开启序列化-->
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin" />
        <!--xmlMapper文件去重-->
        <plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin"/>

        <!--关闭注释-->
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

        <!--配置JDBC连接信息-->
        <jdbcConnection
                driverClass="com.mysql.cj.jdbc.Driver"
                connectionURL="jdbc:mysql://127.0.0.1:3306/mybatis"
                userId="root"
                password="liulinbo"/>
        <!--实体类-->
        <javaModelGenerator targetPackage="com.dhu.liulinbo.entity" targetProject="src/main/java"></javaModelGenerator>
        <!--mapper映射文件位置-->
        <sqlMapGenerator targetPackage="mapper"  targetProject="src/main/resources"></sqlMapGenerator>
        <!--mapper文件位置-->
        <javaClientGenerator targetPackage="com.dhu.liulinbo.mapper" targetProject="src/main/java" type="XMLMAPPER"></javaClientGenerator>

        <!--指定表-->
        <table tableName="users" domainObjectName="User">
            <property name="useActualColumnNames" value="false" />
            <generatedKey column="id" sqlStatement="JDBC" />
        </table>
    </context>
</generatorConfiguration>

配置application.yml

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: liulinbo
    url: jdbc:mysql://127.0.0.1:3306/mybatis

mybatis:
#  配置实体类的包
  type-aliases-package: com/dhu/liulinbo/springbt_mybatis_generator/entity
# mapperXML文件位置
  mapper-locations: classpath:/mapper/*.xml