官网参考文档地址：https://github.com/abel533/Mapper/wiki/4.1.mappergenerator

pom.xml

    <properties>
		<!-- ${basedir}引用工程根目录 -->
		<!-- targetJavaProject：声明存放源码的目录位置 -->
		<targetJavaProject>${basedir}/src/main/java</targetJavaProject>

		<!-- targetMapperPackage：声明MBG生成XxxMapper接口后存放的package位置 -->
		<targetMapperPackage>com.atguigu.shop.mappers</targetMapperPackage>

		<!-- targetModelPackage：声明MBG生成实体类后存放的package位置 -->
		<targetModelPackage>com.atguigu.shop.entities</targetModelPackage>

		<!-- targetResourcesProject：声明存放资源文件和XML配置文件的目录位置 -->
		<targetResourcesProject>${basedir}/src/main/resources</targetResourcesProject>

		<!-- targetXMLPackage：声明存放具体XxxMapper.xml文件的目录位置 -->
		<targetXMLPackage>mappers</targetXMLPackage>

		<!-- 通用Mapper的版本号 -->
		<mapper.version>4.0.0-beta3</mapper.version>

		<!-- MySQL驱动版本号 -->
		<mysql.version>5.1.37</mysql.version>
	</properties>

    <build>
		<plugins>
			<plugin>
				<groupId>org.mybatis.generator</groupId>
				<artifactId>mybatis-generator-maven-plugin</artifactId>
				<version>1.3.2</version>

				<!-- 配置generatorConfig.xml配置文件的路径 -->
				<configuration>
					<configurationFile>
						${basedir}/src/main/resources/generator/generatorConfig.xml
					</configurationFile>
					<overwrite>true</overwrite>
					<verbose>true</verbose>
				</configuration>

				<!-- MBG插件的依赖信息 -->
				<dependencies>
					<dependency>
						<groupId>mysql</groupId>
						<artifactId>mysql-connector-java</artifactId>
						<version>${mysql.version}</version>
					</dependency>
					<dependency>
						<groupId>tk.mybatis</groupId>
						<artifactId>mapper</artifactId>
						<version>${mapper.version}</version>
					</dependency>
				</dependencies>
			</plugin>
		</plugins>
	</build>

generatorConfig.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>
	<!-- 引入外部属性文件 -->
	<properties resource="config.properties" />

	<context id="Mysql" targetRuntime="MyBatis3Simple"
		defaultModelType="flat">
		<property name="beginningDelimiter" value="`" />
		<property name="endingDelimiter" value="`" />

		<!-- 配置通用Mapper的MBG插件相关信息 -->
		<plugin type="${mapper.plugin}">
			<property name="mappers" value="${mapper.Mapper}" />
		</plugin>

		<!-- 配置连接数据库的基本信息 -->
		<jdbcConnection 
			driverClass="${jdbc.driverClass}"
			connectionURL="${jdbc.url}" 
			userId="${jdbc.user}" 
			password="${jdbc.password}">
		</jdbcConnection>
	
		<!-- 配置Java实体类存放位置 -->
		<javaModelGenerator 
			targetPackage="${targetModelPackage}"
			targetProject="${targetJavaProject}" />

		<!-- 配置XxxMapper.xml存放位置 -->
		<sqlMapGenerator 
			targetPackage="${targetXMLPackage}"
			targetProject="${targetResourcesProject}" />

		<!-- 配置XxxMapper.java存放位置 -->
		<javaClientGenerator 
			targetPackage="${targetMapperPackage}"
			targetProject="${targetJavaProject}" 
			type="XMLMAPPER" />

		<!-- 根据数据库表生成Java文件的相关规则 -->
		<!-- tableName="%"表示数据库中所有表都参与逆向工程，此时使用默认规则 -->
		<!-- 默认规则：table_dept→TableDept -->
		<!-- 不符合默认规则时需要使用tableName和domainObjectName两个属性明确指定 -->
		<table tableName="table_emp" domainObjectName="Employee">
			<!-- 配置主键生成策略 -->
			<generatedKey column="emp_id" sqlStatement="Mysql" identity="true" />
		</table>
	</context>
</generatorConfiguration>

 config.properties

# Database connection information
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/common_mapper
jdbc.user=root
jdbc.password=123456

# mapper
mapper.plugin = tk.mybatis.mapper.generator.MapperPlugin
mapper.Mapper = tk.mybatis.mapper.common.Mapper

 Maven执行

• 在 pom.xml 这一级目录的命令行窗口执行 mvn mybatis-generator:generate即可
• 或者如下

 笔记整合，一起学习，一起进步~~~