相关依赖

新建一个Maven工程，只需要数据库驱动mysql-connector-java及mybatis-generator-core即可

<dependencies>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.44</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
        <version>1.3.2</version>
    </dependency>
</dependencies>

配置文件

MybatisGenerator的xml配置文件，官网有提供标准示例：https://mybatis.org/generator/quickstart.html

<!DOCTYPE generatorConfiguration PUBLIC
        "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>

    <properties resource="db.properties"/>

    <context id="simple" targetRuntime="MyBatis3Simple">

        <jdbcConnection driverClass="${jdbc.driverClassName}" connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>

        <javaModelGenerator targetPackage="com.yusian.model" targetProject="src/main/java"/>

        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"/>

        <javaClientGenerator type="XMLMAPPER" targetPackage="com.yusian.mapper" targetProject="src/main/java"/>

        <table tableName="t_video" />

    </context>
</generatorConfiguration>

执行生成代码

有多种方式可以执行，如：maven插件、终端命令行、Java类等，以使用Java类为例，官网参考：https://mybatis.org/generator/running/runningWithJava.html

package com.yusian.main;

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

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

public class SAGenerator {


    public static void main(String[] args) throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        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);
    }
}