插件

 <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <configuration>
                    <configurationFile>src/main/resources/generator/generatorConfig.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>

                <executions>
                    <execution>
                        <id>Generate MyBatis Artifacts</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                <dependency>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-core</artifactId>
                    <version>1.3.2</version>
                </dependency>
               <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.13</version>
                    </dependency>

                </dependencies>
            </plugin>

Configuration .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 >
   

    <!-- 此处指定生成针对MyBatis3的相关类，xml -->
    <context id="context1" targetRuntime="MyBatis3">

        <!-- jdbc连接信息 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/order?characterEncoding=utf8" userId="root" password="root" />

        <!-- 生成vo对象  -->
        <javaModelGenerator targetPackage="com.boolib.shiro.springboot1.model" targetProject="src/main/java" >
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

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

        <!--生成Model类存放位置-->
        <javaClientGenerator
                targetPackage="com.boolib.shiro.springboot1.dao"
                targetProject="src/main/java" type="XMLMAPPER" />

        <table tableName="users"
               domainObjectName="User"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>



    </context>
</generatorConfiguration>