pom依賴

<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
<!-- mapperScan的依賴 -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.0.1</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.6</version>
</dependency>


<build>
    <plugins>
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.7</version>
        </plugin>
    </plugins>
</build>

xml配置文件

<?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>
    <!-- 指定jdbc驅(qū)動 -->
    <classPathEntry location="C:\Users\r.x\.m2\repository\mysql\mysql-connector-java\8.0.17\mysql-connector-java-8.0.17.jar" />

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/data_source?serverTimezone=UTC"
                        userId="root"
                        password="root">
        </jdbcConnection>

        <javaTypeResolver >
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <javaModelGenerator targetPackage="com.yrx.datasourcemanager.manager.pojo" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <sqlMapGenerator targetPackage="com.yrx.datasourcemanager.manager.xml"  targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <javaClientGenerator type="ANNOTATEDMAPPER" targetPackage="com.yrx.datasourcemanager.manager.dao"  targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!-- 目標表 -->
        <table tableName="blog">
            <property name="useActualColumnNames" value="false"/>
            <generatedKey column="ID" sqlStatement="mysql" identity="true" />
        </table>
    </context>
</generatorConfiguration>

生成代碼的腳本

mvn -Dmybatis.generator.overwrite=true mybatis-generator:generate

最后還要指定spring掃描的mapper包路徑

@Configuration
@MapperScan("com.yrx.datasourcemanager.manager.dao")
public class MybatisConfig {

}