• 首先在pom.xml中配置需要的包

<dependency>
  <groupId>org.mybatis.spring.boot</groupId>
  <artifactId>mybatis-spring-boot-starter</artifactId>
  <version>1.3.1</version>
</dependency>

<plugin>
  <groupId>org.mybatis.generator</groupId>
  <artifactId>mybatis-generator-maven-plugin</artifactId>
  <version>1.3.5</version>
  <dependencies>
    <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>1.3.5</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.41</version>
    </dependency>
  </dependencies>
  <executions>
    <execution>
      <id>mybatis generator</id>
      <phase>package</phase>
      <goals>
        <goal>generate</goal>
      </goals>
    </execution>
  </executions>

  <configuration>
    <!--允许移动生成的文件-->
    <verbose>true</verbose>
    <!--允许自动覆盖-->
    <overwrite>true</overwrite>
    <configurationFile>
      src/main/resources/mybatis-generator.xml
    </configurationFile>
  </configuration>
</plugin>

• 在 resources 下创建 mybatis-generator.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>
    <!--驱动包的路径-->
    <context id="DB2Tables" targetRuntime="MyBatis3">

        <!--数据库连接-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/miaosha?characterEncoding=utf-8"
                        userId="root"
                        password="root"/>

        <!--生成Model类存放位置-->
        <javaModelGenerator targetPackage="com.miaoshaproject.dataobject" targetProject="src/main/java">
            <!--是否对model添加构造函数-->
            <property name="constructorBased" value="false"/>
            <!--是否允许子包-->
            <property name="enableSubPackages" value="true"/>
            <!--建立的model对象是否不可变，也就是生成的model没有setter方法-->
            <property name="immutable" value="false"/>
            <property name="trimStrings" value="false"/>
        </javaModelGenerator>

        <!--生成映射文件存放位置-->
        <sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!--生成Mapper类存放位置-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.miaoshaproject.dao" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

         
            <!--生成与表对应的类名-->
        <!--    禁止其生成Example相关的文件
                enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" SelectByExampleQueryId="false"-->
        <table tableName="user_info" domainObjectName="UserDO"
               enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" selectByExampleQueryId="false">
        </table>

        <table tableName="user_password" domainObjectName="UserPasswordDO"
               enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" selectByExampleQueryId="false">
        </table>
    </context>

</generatorConfiguration>

•  配置Maven运行

• 生成的文件