1、新增 pom 依賴：

        <!-- 逆向工程 -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator</artifactId>
            <version>1.3.4</version>
        </dependency>

        <dependency
 
>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.4</version>
        </dependency>
        <!--====================-->

新增配置：

<!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="testTables" targetRuntime="MyBatis3">
        <commentGenerator>
            <!-- 是否去除自動生成的註釋 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!--資料庫連線的資訊：驅動類、連線地址、使用者名稱、密碼 -->
 

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://rm-bp14b4ud3l5yoy3f6po.mysql.rds.aliyuncs.com:3306/zhongshu_prod_db" userId="root"
                        password="Liyi880301">
        </jdbcConnection>
        <!-- 預設false，把JDBC DECIMAL 和 NUMERIC 型別解析為 Integer，為 true時把JDBC DECIMAL 和
            NUMERIC 型別解析為java.math.BigDecimal -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="true"/>
        </javaTypeResolver>

        <!-- targetProject:生成PO類的位置 -->
        <javaModelGenerator targetPackage="com.zhongshu.vegetables.bean"
                            targetProject=".\src">
            <!-- enableSubPackages:是否讓schema作為包的字尾 -->
            <property name="enableSubPackages" value="false"/>
            <!-- 從資料庫返回的值被清理前後的空格 -->
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!-- targetProject:mapper對映檔案生成的位置 -->
        <sqlMapGenerator targetPackage="com.zhongshu.vegetables.mapper"
                         targetProject=".\src">
            <!-- enableSubPackages:是否讓schema作為包的字尾 -->
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>
        <!-- targetPackage：mapper介面生成的位置 -->
        <!--生成Dao類存放位置-->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.zhongshu.vegetables.dao"
                             targetProject=".\src">
            <!-- enableSubPackages:是否讓schema作為包的字尾 -->
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <!-- 指定資料庫表 -->
        <table schema="" tableName="area"></table>
        <table schema="" tableName="category"></table>
        <table schema="" tableName="common"></table>
        <table schema="" tableName="dictionary"></table>
        <table schema="" tableName="item"></table>
        <table schema="" tableName="menu"></table>
        <table schema="" tableName="menu_role"></table>
        <table schema="" tableName="user"></table>
        <table schema="" tableName="order"></table>
        <table schema="" tableName="order_detail"></table>
        <table schema="" tableName="receive_address"></table>
        <table schema="" tableName="role"></table>
        <table schema="" tableName="shop_cart"></table>
        <table schema="" tableName="unit"></table>
        <table schema="" tableName="version"></table>

    </context>
</generatorConfiguration>

執行程式碼

package com.zhongshu.vegetables.utils;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;

public class GeneratorSqlmap {

    public void generator() throws Exception{

        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;

        //指定 逆向工程配置檔案
        File configFile = new File("./src/main/resources/generatorConfig.xml");


        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
                callback, warnings);
        myBatisGenerator.generate(null);

    } 
    public static void main(String[] args) throws Exception {
        try {
            GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();
            generatorSqlmap.generator();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}