Mybatis-plus代码生成器（3.5.1+版本）的应用

    <!--mybatisPlus-->
    <dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.4.3.4</version>
    </dependency>
    <!--mybatis-plus代码生成器-->
    <dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.5.1</version>
    </dependency>
    <!--velocity模板-->
    <dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity-engine-core</artifactId>
    <version>2.3</version>
    </dependency>
    <!--freemarker模板-->
    <dependency>