新建 IDEA Maven 项目

打开IDEA,点击Create New Project,在弹出的界面中选择Maven(左侧菜单列表),右侧选择好Project SDK版本,这里的版本是1.8,如果你没有设置那么可以点击New按钮重新设置JAVA JDK目录。
选中Create from archetype,
在下面的列表中选中org.apache.maven.archetypes:maven-archetype-webapp,点击Next按钮 (如图),

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此处为您本地安装maven的路径

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如果没有生成java 目录的话，手动在main目录下添加 java，resources 两个目录

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设置java目录为source，resources为资源包 File --》ProjectStructure...

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然后在 resources目录下新建generatorConfig.xml 如下

<?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>
    <!-- 配置mysql 驱动jar包路径.用了绝对路径，就是maven仓库下的mysql的jar -->
    <classPathEntry location="/Users/huangfeixiang/.m2/repository/mysql/mysql-connector-java/5.1.34/mysql-connector-java-5.1.34.jar" />

    <context id="mysql_tables" targetRuntime="MyBatis3">
        <!-- 防止生成的代码中有很多注释，加入下面的配置控制 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
            <property name="suppressDate" value="true" />
        </commentGenerator>

        <!-- 数据库连接  请使用您自己的数据库配置-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/test?useUnicode=true"
                        userId="test"
                        password="test">
        </jdbcConnection>

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

        <!-- 数据表对应的model层  -->
        <javaModelGenerator targetPackage="com.mybatis.generator.entity" targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!-- sql mapper 映射配置文件 -->
        <sqlMapGenerator targetPackage="com.mybatis.generator.mapper"  targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!-- mybatis3中的mapper接口 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.mybatis.generator.dao"  targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!-- 数据表进行生成操作 schema:相当于库名; tableName:表名; domainObjectName:对应的DO -->
        <table schema="test" tableName="test_table" domainObjectName="TestTable"
               enableCountByExample="true" enableUpdateByExample="true"
               enableDeleteByExample="true" enableSelectByExample="true"
               selectByExampleQueryId="true">
        </table>

    </context>
</generatorConfiguration>

项目的pom 文件，参考如下配置

<?xml version="1.0" encoding="UTF-8" ?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mybatis.generator</groupId>
    <artifactId>mybatisgenerator</artifactId>
    <version>1.0-SNAPSHOT</version>
    <build>
        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite></configuration>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.34</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.3.1</version>
        </dependency>
        <!-- mybatis-generator-core 反向生成java代码-->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>
    </dependencies>

</project>

到此配置结束，点击 IDEA右侧的 Maven标签如下图