一、创建项目

  首先得用idea创建一个maven项目。

二、修改pom文件

  在 pom 文件中添加依赖：

<dependency>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-core</artifactId>
    <version>1.3.2</version>
</dependency>

  在 pom 文件中添加 mybatis-generator-maven-plugin 插件：

<build>
    <plugins>
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.2</version>
            <configuration>
                <configurationFile>src/main/resources/mybatis-generator.xml</configurationFile>
                <overwrite>true</overwrite>
                <verbose>true</verbose>
            </configuration>
        </plugin>
    </plugins>
</build>

三、添加配置文件

  在 src/main/resources 目录下，添加文件 mybatis-generator.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>

    <!-- 填写mysql-connector-java的jar包所在位置-->
    <classPathEntry location="D:\develop\apache-maven-3.6.2\repository\mysql\mysql-connector-java\8.0.18\mysql-connector-java-8.0.18.jar"/>
    <context id="mysql" targetRuntime="MyBatis3">
        <!--<plugin type="org.mybatis.generator.plugins.UnmergeableXmlMappersPlugin"/>-->

        <!-- 配置在逆向生成时不需要有他们默认的注释 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <!-- 配置数据库连接信息 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/trademarket?characterEncoding=utf8&amp;serverTimezone=GMT%2B8&amp;useSSL=false"
                        userId="root"
                        password="root">
        </jdbcConnection>

        <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 和
            NUMERIC 类型解析为java.math.BigDecimal -->
        <javaTypeResolver >
            <property name="forceBigDecimals" value="true" />
        </javaTypeResolver>

        <!-- 指定javabean生成的位置
            targetPackage:在哪个包下生成
            targetProject:在哪个工程下
        -->
        <javaModelGenerator targetPackage="com.qq.model" targetProject="src/main/java">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
            <!-- 从数据库返回的值被清理前后的空格 -->
            <property name="trimStrings" value="false" />
        </javaModelGenerator>

        <!-- 指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="resources.mapper"
                         targetProject="src/main">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!-- 指定到接口生成的位置 ，mapper接口 -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.qq.mapper"
                             targetProject="src/main/java">
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>

        <!-- 指定每个表的生成策略 -->
        <table tableName="tbl_user" domainObjectName="User"/>

    </context>
</generatorConfiguration>

四、运行

  点击idea右边的 Maven ，然后找到我用红色框框起来的部分，双击运行。

maven插件运行

五、结果

  当你看到控制台输出 BUILD SUCCESS ，则表明已经自动生成成功了。

F:\qq\java\jdk1.8\bin\java.exe -Dmaven.multiModuleProjectDirectory=F:\qq\trademarket "-Dmaven.home=F:\IntelliJ IDEA 2019.1.3\plugins\maven\lib\maven3" "-Dclassworlds.conf=F:\IntelliJ IDEA 2019.1.3\plugins\maven\lib\maven3\bin\m2.conf" "-javaagent:F:\IntelliJ IDEA 2019.1.3\lib\idea_rt.jar=52561:F:\IntelliJ IDEA 2019.1.3\bin" -Dfile.encoding=UTF-8 -classpath "F:\IntelliJ IDEA 2019.1.3\plugins\maven\lib\maven3\boot\plexus-classworlds-2.5.2.jar" org.codehaus.classworlds.Launcher -Didea.version2019.1.3 org.mybatis.generator:mybatis-generator-maven-plugin:1.3.2:generate
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building trademarket-core 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- mybatis-generator-maven-plugin:1.3.2:generate (default-cli) @ trademarket-core ---
[INFO] Connecting to the Database
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
[INFO] Introspecting table tbl_bill
log4j:WARN No appenders could be found for logger (org.mybatis.generator.internal.db.DatabaseIntrospector).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[INFO] Introspecting table tbl_user
[INFO] Generating Example class for table tbl_user
[INFO] Generating Record class for table tbl_user
[INFO] Generating Mapper Interface for table tbl_user
[INFO] Generating SQL Map for table tbl_user
[INFO] Saving file UserMapper.xml
[INFO] Saving file UserExample.java
[INFO] Saving file User.java
[INFO] Saving file UserMapper.java
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.948 s
[INFO] Finished at: 2019-12-27T14:30:05+08:00
[INFO] Final Memory: 15M/203M
[INFO] ------------------------------------------------------------------------

Process finished with exit code 0

如遇到什么问题，可以在下方留言区进行讨论。如果觉得本文写的还可以，不妨点个赞 收藏以下吧~