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

<?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>
    <!-- 指定MBG运行生成对象的环境信息，targetRuntime是枚举值，看官网按需选择 -->
    <context id="grate" targetRuntime="MyBatis3">
        <!-- 去除所有注释，默认的注释没什么用，很冗余，这里是我自己重写了一下默认的接口，就保留一个字段的注释，暂时可以把这个去掉看效果 -->
        <commentGenerator type="com.cls.all.great.mbg.comment.MyCommentGenerator">
           <!-- <property name="addRemarkComments" value="true" />-->
        </commentGenerator>
        <!--数据连接信息-->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/dbName"
                        userId="111"
                        password="222">
        </jdbcConnection>

        <!--java实体类的目标路径等，根据实际编写，targetProject的路径必须是已经存在的-->
        <javaModelGenerator targetPackage="pojo" targetProject="\codeSpace\MGB">
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!-- 生成SQL.xml的目标路径-->
        <sqlMapGenerator targetPackage="mapper"  targetProject="\codeSpace\MGB">
        </sqlMapGenerator>

        <!-- 用来控制生成java接口类，可选配置，不指定该元素时，不会生成java客户端接口（就是那个接口） -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="mapper"  targetProject="\codeSpace\MGB">
        </javaClientGenerator>

　　　　　<!-- 配置数据库表的，catalog是你的数据库名字，oracle用schema -->
        <table catalog="grate" tableName="users"
               enableUpdateByPrimaryKey="true"
               enableDeleteByPrimaryKey="true"
               enableSelectByPrimaryKey="true"
               selectByPrimaryKeyQueryId="false"
               enableSelectByExample="false"
               enableDeleteByExample="false"
               enableCountByExample="false"
               enableUpdateByExample="false"
               selectByExampleQueryId="false">
        </table>
    </context>
</generatorConfiguration>

package com.cls.all.great.mbg;

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

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

public class MbgGenerator {

    public static void main(String[] args) throws IOException, XMLParserException, InvalidConfigurationException, SQLException, InterruptedException {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        File configFile = new File("generatorConfig.xml");
        System.out.println(configFile.getAbsolutePath());
        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);
        System.out.println(warnings.toString()); // 要是不成功，可以把错误打印出来，看错误
    }
}