//统一依赖定义

ext.libraries = [


mybatisGenerators: [

        'org.mybatis.generator:mybatis-generator-core:1.4.0',

        'mysql:mysql-connector-java:5.1.48',

        'org.mybatis:mybatis:3.5.1',

        'org.apache.ant:ant:1.10.5'

]
]

buidle.gradle 添加dependecy.gradle的引用

apply from: 'dependency.gradle'

1，方式一：使用类 MyBatisGenerator

准备的xml: generatorConfig.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>

    <context id="context" targetRuntime="MyBatis3">

        <!--覆盖生成XML文件 -->

        <plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin" />

        <commentGenerator>

            <property name="suppressAllComments" value="true"/>

            <property name="suppressDate" value="true"/>

        </commentGenerator>

        <!-- 数据库的相关配置 -->

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"

                        connectionURL="jdbc:mysql://localhost:3306/yan?useSSL=false" userId="yan" password="yan.123"/>

        <javaTypeResolver>

            <property name="forceBigDecimals" value="false"/>

        </javaTypeResolver>

        <!-- 实体类生成的位置 -->

        <javaModelGenerator targetPackage="com.report.entity.po" targetProject="src/main/java">

            <property name="enableSubPackages" value="false"/>

            <property name="trimStrings" value="true"/>

        </javaModelGenerator>

        <!-- *Mapper.xml 文件的位置 -->

        <sqlMapGenerator targetPackage="report" targetProject=".\src\main\resources\mybatis">

            <property name="enableSubPackages" value="false"/>

        </sqlMapGenerator>

        <!-- Mapper 接口文件的位置 -->

        <javaClientGenerator targetPackage="com.report.repository" targetProject="src/main/java" type="XMLMAPPER">

            <property name="enableSubPackages" value="false"/>

        </javaClientGenerator>

        <!-- 相关表的配置 -->

        <table tableName="sys_report_class" domainObjectName="SysReportClass" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>

        <table tableName="sys_report_param" domainObjectName="SysReportParam" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>

            </context>

</generatorConfiguration>

<plugintype="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin"/>
注意：使用类生成的时候，要添加这个，不然会追加生成

类：MybatisGeneratorUtil

public class MybatisGeneratorUtil {



    public static void main(String[] args) {

         generateMybatisInfo();

    }



    private static void generateMybatisInfo() {

        try {

            System.out.println("start generator ...");



            List<String> warnings = new ArrayList<>();

            File configFile = new File("src/main/resources/mybatis/config/generatorConfig.xml");

            ConfigurationParser cp = new ConfigurationParser(warnings);

            Configuration config = cp.parseConfiguration(configFile);

            DefaultShellCallback callback = new DefaultShellCallback(true);

            MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);

            myBatisGenerator.generate(null);



            System.out.println("end generator!");

        } catch (IOException | XMLParserException | InterruptedException | SQLException | InvalidConfigurationException e) {

            e.printStackTrace();

        }



    }

}

2，使用build任务生成：

Xml：generatorConfigMb.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>

    <context id="context" targetRuntime="MyBatis3">

        <!--覆盖生成XML文件  使用gradle任务的方式会读取不到-->

<!--<plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin" />-->
        <commentGenerator>

            <property name="suppressAllComments" value="true"/>

            <property name="suppressDate" value="true"/>

        </commentGenerator>

        <!-- 数据库的相关配置 -->

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"

                        connectionURL="jdbc:mysql://localhost:3306/yan?useSSL=false" userId="yan" password="yan.123"/>

        <javaTypeResolver>

            <property name="forceBigDecimals" value="false"/>

        </javaTypeResolver>

        <!-- 实体类生成的位置 -->

        <javaModelGenerator targetPackage="com.report.entity.po" targetProject="src/main/java">

            <property name="enableSubPackages" value="false"/>

            <property name="trimStrings" value="true"/>

        </javaModelGenerator>

        <!-- *Mapper.xml 文件的位置 -->

        <sqlMapGenerator targetPackage="report" targetProject=".\src\main\resources\mybatis">

            <property name="enableSubPackages" value="false"/>

        </sqlMapGenerator>

        <!-- Mapper 接口文件的位置 -->

        <javaClientGenerator targetPackage="com.report.repository" targetProject="src/main/java" type="XMLMAPPER">

            <property name="enableSubPackages" value="false"/>

        </javaClientGenerator>

        <!-- 相关表的配置 -->

        <table tableName="sys_report_class" domainObjectName="SysReportClass" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>

        <table tableName="sys_report_param" domainObjectName="SysReportParam" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>

            </context>

</generatorConfiguration>

注意：使用任务的生成的方式，不会覆盖。


这边就注释了。不然会报找不到的错误

Build.gradle:

plugins {
        id "com.arenagod.gradle.MybatisGenerator" version "1.4" //gradle提供的mybatis generator插件
}


mybatisGenerator {

    verbose = true

    configFile = 'src/main/resources/mybatis/config/generatorConfigMb.xml'

}

点击更新，然后点击：mbGenerator

生成结果：

3.使用ant的方式：

1，GeneratorAntTask

Xml: generatorConfig.xml 同方法一的xml

类：MybatisAntGeneratorUtil

public class MybatisAntGeneratorUtil {



    public static void main(String[] args) {

        generateMybatisXml();

    }



    public static void generateMybatisXml() {

        try {

            System.out.println("start mybatis generator ...");

            GeneratorAntTask task = new GeneratorAntTask();



            String xmlPath = "D:/project/report/src/main/resources/mybatis/config/generatorConfig.xml";

            task.setConfigfile(xmlPath);    //（配置文件具体path）

            task.execute();

            System.out.println("end mybatis generator!");

        } catch (Exception e) {

            e.printStackTrace();



        }

    }



}

使用类GeneratorAntTask必须要引用 ant的包： 'org.apache.ant:ant:1.10.5'

2，使用build任务ant方式（失败）

Builde.gradle:

plugins {

        id "com.arenagod.gradle.MybatisGenerator" version "1.4" //gradle提供的mybatis generator插件

}


def getDbProperties = {

    def properties = new Properties()

    file("src/main/resources/mybatis/config/jdbc.properties").withInputStream { inputStream ->

        properties.load(inputStream)

    }

    properties

}



task mybatisGenerate << {

    def properties = getDbProperties()

    ant.properties['targetProject'] = projectDir.path

    ant.properties['driverClass'] = properties.getProperty("jdbc.driverClassName")

    ant.properties['connectionURL'] = properties.getProperty("jdbc.url")

    ant.properties['userId'] = properties.getProperty("jdbc.username")

    ant.properties['password'] = properties.getProperty("jdbc.password")

    ant.properties['src_main_java'] = sourceSets.main.java.srcDirs[0].path

    ant.properties['src_main_resources'] = sourceSets.main.resources.srcDirs[0].path

    ant.properties['modelPackage'] = properties.getProperty("modelPackage")

    ant.properties['mapperPackage'] = properties.getProperty("mapperPackage")

    ant.properties['sqlMapperPackage'] = properties.getProperty("sqlMapperPackage")



    ant.taskdef(

            name: 'mybatisGenerator',

            classname: 'org.mybatis.generator.ant.GeneratorAntTask',

            classpath: configurations.mybatisGenerator.asPath

    )

    ant.mybatisGenerator(overwrite: true,

            configfile: 'src/main/resources/mybatis/config/generator-config.xml', verbose: true) {

        propertyset {

            propertyref(name: 'targetProject')

            propertyref(name: 'userId')

            propertyref(name: 'driverClass')

            propertyref(name: 'connectionURL')

            propertyref(name: 'password')

            propertyref(name: 'src_main_java')

            propertyref(name: 'src_main_resources')

            propertyref(name: 'modelPackage')

            propertyref(name: 'mapperPackage')

            propertyref(name: 'sqlMapperPackage')

        }

    }

}

数据库文件：jdbc.properties

jdbc.url=jdbc:mysql://localhost:3306/yan?useSSL=false

jdbc.username=yan

jdbc.password=yan.123

jdbc.driverClassName=com.mysql.jdbc.Driver



#生成实体类所在的包

modelPackage=com.ffcs.iod.ms.workflow.report.entity



#生成的mapper接口类所在包

mapperPackage=com.ffcs.iod.ms.workflow.report.repository

#生成的mapper xml文件所在包，默认存储在resources目录下

sqlMapperPackage=src/main/resources/mybatis/report

xml 文件：generator-config.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>

    <context id="context" targetRuntime="MyBatis3">

        <plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin"/>

        <commentGenerator>

            <property name="suppressAllComments" value="true"></property>

            <property name="suppressDate" value="true"></property>

            <property name="javaFileEncoding" value="utf-8"/>

        </commentGenerator>

        <!-- 数据库的相关配置 -->

        <jdbcConnection driverClass="${driverClass}"

                        connectionURL="${connectionURL}"

                        userId="${userId}"

                        password="${password}">

        </jdbcConnection>



        <javaTypeResolver>

            <property name="forceBigDecimals" value="false"/>

        </javaTypeResolver>

        <!-- 实体类生成的位置 -->

        <javaModelGenerator targetPackage="${modelPackage}" targetProject="${src_main_java}">

            <property name="enableSubPackages" value="true"></property>

            <property name="trimStrings" value="true"></property>

        </javaModelGenerator>



        <!-- *Mapper.xml 文件的位置 -->

        <sqlMapGenerator targetPackage="${sqlMapperPackage}" targetProject="${src_main_resources}">

            <property name="enableSubPackages" value="true"></property>

        </sqlMapGenerator>





        <!-- Mapper 接口文件的位置 -->

        <!--

        type=ANNOTATEDMAPPER表示不生成xml文件

        这里我用XMLMAPPER

        -->

        <javaClientGenerator targetPackage="${mapperPackage}" targetProject="${src_main_java}" type="XMLMAPPER">

            <property name="enableSubPackages" value="true"/>

        </javaClientGenerator>



        <!-- 相关表的配置 -->

        <table tableName="sys_report_class" domainObjectName="SysReportClass" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>

        <table tableName="sys_report_param" domainObjectName="SysReportParam" enableCountByExample="false"  enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"/>
    </context>

</generatorConfiguration>

刷新项目并执行：

报错：

* What went wrong:

Execution failed for task ':mybatisGenerate'.

> taskdef class org.mybatis.generator.ant.GeneratorAntTask cannot be found

using the classloader AntClassLoader[]

网上查了下，没找到解决方式就放弃了。这种方式还麻烦。

总结：

使用方法2最简单，方法1会简单些，方法3还有引用ant的jar包。方式4网上很多案例都是那样，但是报错了，后面有机会碰到再更新。

使用mybatis-generator生成，减少一些工作。

原文链接：https://blog.csdn.net/qq_35461948/article/details/111629848