mybatis-generator 插件

首先肯定要有mybatis的依赖

        <!--mybatis spring-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>

然后是要mybatis生成代码器核心依赖

         <!--mybatis生成代码控件-->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
        </dependency>

之后需要MySQL的依赖

        <!--MySQL依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

之后需要在build>plugins下加入一个plugin

<!--mybatis generator plugin-->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <executions>
                    <execution>
                        <id>Generate MyBatis Files</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                        <phase>generate-sources</phase>
                        <configuration>
                            <verbose>true</verbose>
                            <overwrite>true</overwrite>
                        </configuration>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.38</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.5</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis</groupId>
                        <artifactId>mybatis</artifactId>
                        <version>3.4.2</version>
                    </dependency>
                </dependencies>
            </plugin>
            <!--/mybatis generator plugin-->

在intelli IDEA 的菜单栏，点击RUN-Edit Configurations,点击弹出窗口左上角的+号，新增Maven.为当前配置配置一个名称，这里命名为"generator",

然后在 “Command line” 选项中输入“mybatis-generator:generate -e”。这里加了“-e ”选项是为了让该插件输出详细信息，帮助我们定位问题。
点击Apply。

配置classpath下的配置文件:

<?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>

    <context id="DB2Tables"    targetRuntime="MyBatis3">
        <!--避免生成重复代码的插件-->
        <plugin type="com.tansuo365.test1.util.OverIsMergeablePlugin" />

        <!--是否在代码中显示注释-->
        <commentGenerator>
            <property name="suppressDate" value="true" />
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

        <!--数据库链接地址账号密码-->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/tansuodb" userId="root" password="xxxxxxxx">
        </jdbcConnection>
        <!--不知道做什么用的。。。反正贴上来了~-->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!--生成bean类存放位置-->
        <javaModelGenerator targetPackage="com.tansuo365.test1.bean" targetProject="src">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!--生成xml映射文件存放位置-->
        <sqlMapGenerator targetPackage="classpath:mappings" targetProject="resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!--生成mapper类存放位置-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.tansuo365.test1.mapper" targetProject="src">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!--生成对应表及类名-->
        <table tableName="petroleum_coke_tbl" domainObjectName="PetroleumCoke" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="true" selectByExampleQueryId="false">
            <property name="my.isgen.usekeys" value="true"/>
            <property name="useActualColumnNames" value="true"/>
            <generatedKey column="id" sqlStatement="JDBC"/>
        </table>
     <!--   <table tableName="role" domainObjectName="Role" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="true" selectByExampleQueryId="false">
            <property name="my.isgen.usekeys" value="true"/>
            <property name="useActualColumnNames" value="true"/>
            <generatedKey column="id" sqlStatement="JDBC"/>
        </table>
        <table tableName="permission" domainObjectName="Permission" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="true" selectByExampleQueryId="false">
            <property name="my.isgen.usekeys" value="true"/>
            <property name="useActualColumnNames" value="true"/>
            <generatedKey column="id" sqlStatement="JDBC"/>
        </table>
        <table tableName="user_role" domainObjectName="UserRole" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="true" selectByExampleQueryId="false">
            <property name="my.isgen.usekeys" value="true"/>
            <property name="useActualColumnNames" value="true"/>
            <generatedKey column="id" sqlStatement="JDBC"/>
        </table>
        <table tableName="role_permission" domainObjectName="RolePermission" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="true" selectByExampleQueryId="false">
            <property name="my.isgen.usekeys" value="true"/>
            <property name="useActualColumnNames" value="true"/>
            <generatedKey column="id" sqlStatement="JDBC"/>
        </table>-->

    </context>
</generatorConfiguration>

具体也可以参考https://www.jianshu.com/p/310c299846fc