首先在依賴中加入依賴包：

        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>

然後加入在< build >節點的< plugins >裡面加入一個< plugin >：

            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <executions>
                    <execution
 
>
                        <id>Generate MyBatis Files</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                        <phase>generate</phase>
                        <configuration
 
>
                            <verbose>true</verbose>
                            <overwrite>true</overwrite>
                        </configuration>
                    </execution>
                </executions>

                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.38</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.5</version>
                    </dependency>
                    <dependency>
                        <groupId>org.mybatis</groupId>
                        <artifactId>mybatis</artifactId>
                        <version>3.4.2</version>
                    </dependency>
                </dependencies>

            </plugin>

最後在配置mybatis-generator的配置檔案generatorConfig.xml放在resources目錄下（預設配置，可修改）：

<?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="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <!--<plugin type="tk.mybatis.mapper.generator.MapperPlugin">-->
        <!--<property name="mappers" value="tk.mybatis.mapper.common.Mapper"/>-->
        <!--&lt;!&ndash; caseSensitive預設false，當資料庫表名區分大小寫時，可以將該屬性設定為true &ndash;&gt;-->
        <!--<property name="caseSensitive" value="true"/>-->
        <!--</plugin>-->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="url" --資料庫連線url
                        userId="username"  --資料庫使用者名稱
                        password="password"> --資料庫密碼
        </jdbcConnection>

        <!--自動生成的實體的存放包路徑 -->
         <!--targetpackage為生成類的包路徑， targetProject為檔案存放路徑在專案中的位置-->
        <javaModelGenerator  targetPackage="com.wk.entity.po"  targetProject="src/main/java/">
            <property  name="enableSubPackages"  value="true"/>
            <property  name="trimStrings"  value="true"/>
        </javaModelGenerator>

        <!--自動生成的*Mapper.xml檔案存放路徑 -->
        <sqlMapGenerator  targetPackage="mybatis-mapper" targetProject="src/main/resources/">
            <property  name="enableSubPackages"  value="true"/>
        </sqlMapGenerator>

        <!--自動生成的*Mapper.java存放路徑 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.wk.entity.dao"  targetProject="src/main/java/">
            <property  name="enableSubPackages"  value="true"/>
        </javaClientGenerator>
        <!-- 要生成的表 -->
        <!-- 這裡的百分號代表對該資料庫中所有的表進行生成 -->
        <table tableName="tableName">
            <!--資料庫schema-->
            <property name="runtimeSchema" value="databaseName"/>
            <!--主鍵-->
            <generatedKey column="id" sqlStatement="MySql" identity="true"/>
        </table>
    </context>
</generatorConfiguration>