1、引入插件

 <plugin>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-maven-plugin</artifactId>
        <version>1.3.2</version>
        <configuration>
          <configurationFile>src/main/resources/mybatis/generatorConfig.xml</configurationFile>
          <verbose>true</verbose>
          <overwrite>true</overwrite>
        </configuration>
        <!--           <executions>
                       <execution>
                           <id>Generate MyBatis Artifacts</id>
                           <goals>
                               <goal>generate</goal>
                           </goals>
                       </execution>
                   </executions>-->
        <executions>
          <execution>
            <id>Generate MyBatis Artifacts</id>
            <!--<phase>package</phase>-->
            <phase>deploy</phase>
            <goals>
              <goal>generate</goal>
            </goals>
          </execution>
        </executions>
      </plugin>

2、generatorConfig.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>
    <!--jdbc的驱动jar-->
    <classPathEntry
            location="src/main/resources/lib/mysql-connector-java-5.1.35.jar"/>
    <context id="my" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="false"/>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!--数据库的配置-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://IP:3306/数据库?serverTimezone=UTC"
                        userId="root"
                        password="数据库密码"/>

        <!-- model 实体文件配置 -->
        <javaModelGenerator targetPackage="com.test.po"
                            targetProject="./src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- mapper.xml文件生成配置 -->
        <sqlMapGenerator targetPackage="mapper"
                         targetProject="./src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!-- mapper接口生成配置 -->
        <javaClientGenerator targetPackage="com.test.mapper"
                             targetProject="./src/main/java" type="XMLMAPPER">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>


        <!-- 对应表 -->
        <table tableName="jbpm4_hist_task" domainObjectName="Jbpm4HistTaskPO"></table>
<!--        <table tableName="JE_CORE_PROCESSLOG" domainObjectName="JECoreProcessLogPO"></table>-->
<!--        <table tableName="jbpm4_task" domainObjectName="Jbpm4TaskPO"></table>-->
<!--        <table tableName="JE_CORE_PROCESSINFO" domainObjectName="JECoreProcessInfoPO"></table>-->
<!--        <table tableName="JBPM4_EXECUTION" domainObjectName="Jbpm4ExecutionPO"></table>-->
<!--        <table tableName="JBPM4_PARTICIPATION" domainObjectName="Jbpm4ParticipationPO"></table>-->




    </context>
</generatorConfiguration>

3、idea配置执行命令

mybatis-generator:generate -e