配置文件

<?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="DB2Tables" targetRuntime="MyBatis3">
        <!--        生成没有注释的bean-->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!--        配置数据库连接信息-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/itzfc?characterEncoding=utf8"
                        userId="root"
                        password="123456">
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!--        指定javaBean生成的位置-->
        <javaModelGenerator targetPackage="com.zfc.furns.bean" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!--        指定sql映射文件生成的位置
        1. 要根据自己的实际情况指定
        -->
        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!--        指定dao接口生成的位置, 也就是mapper接口-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.zfc.furns.dao" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <!--        指定要逆向生成的表和生成策略-->
        <table tableName="furn" domainObjectName="Furn"></table>
    </context>
</generatorConfiguration>

测试类

package com.zfc.test;

import org.junit.Test;
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;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author zfc
 * @version 1.0
 */
public class MBGTest {

    @Test
    public void generator() throws Exception {

        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        //这里要指定你自己配置的mbg.xml
        //如果这样访问，需要将文件放在项目下
        File configFile = new File("mbg.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);
    }
}