1.官网

2.使用Mavan插件生成

将压缩包使用idea打开，打开根目录generatorConfig.xml文件，配置此文件内容
1、修改数据库连接信息（端口、数据库名、账号及密码）
2、填写对应pojo包路径，并创建相应路径的包
3、填写对应mapper所在路径，并创建相应路径的包
4、配置mapper对应的xml映射文件，并创建相应路径的包
5、填写数据库表名称
6、打开路径src-main-java-com-imooc-mybatis-utils-GeneratorDispory，
右键执行即可生成相应的pojo文件、mapper文件及映射xml文件，将其拷贝到自己的项目中即可

直接下载 mybatis-generator-for-imooc.java修改为zip
转载【https://www.yuque.com/yiqianshuguang/ugvad4/adyexb】

2.1 创建一个新的工程 mybatis_generator_xx

2.2 引入相关pom

<dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
        </dependency>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!--mapper-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>1.2.4</version>
        </dependency>
        <!-- mybatis 逆向生成工具  -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
            <scope>compile</scope>
            <optional>true</optional>
        </dependency>
    </dependencies>

2.3 创建文件

1. generatorConfig.xml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="MysqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
        <!-- 通用mapper所在目录 -->
        <plugin type="tk.mybatis.mapper.generator.MapperPlugin">
            <property name="mappers" value="com.lv.my.mapper.MyMapper"/>
        </plugin>
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/foodie-shop"
                        userId="root"
                        password="root">
        </jdbcConnection>
        <!-- 对应生成的pojo所在包 -->
        <javaModelGenerator targetPackage="com.lv.pojo" targetProject="src/main/java"/>
        <!-- 对应生成的mapper所在目录 -->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"/>
        <!-- 配置mapper对应的java映射 -->
        <javaClientGenerator targetPackage="com.lv.mapper" targetProject="src/main/java" type="XMLMAPPER"/>
      <!-- 数据库表 -->
        <table tableName="carousel"></table>
        <table tableName="category"></table>
        <table tableName="items"></table>
        <table tableName="items_comments"></table>
        <table tableName="items_img"></table>
        <table tableName="items_param"></table>
        <table tableName="items_spec"></table>
        <table tableName="order_items"></table>
        <table tableName="order_status"></table>
        <table tableName="orders"></table>
        <table tableName="user_address"></table>
        <table tableName="users"></table>
    </context>
</generatorConfiguration>

2. 创建通用mapper为MyMapper类，生成的mapper都会继承这个通用mapper

MyMapper类

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2016 abel533@gmail.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.lv.my.mapper;
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;
/**
 * 继承自己的MyMapper
 */
public interface MyMapper<T> extends Mapper<T>, MySqlMapper<T> {
}

3. 启动类GeneratorDisplay

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 GeneratorDisplay {
    public void generator() throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        //指定 逆向工程配置文件
        File configFile = new File("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 {
            GeneratorDisplay generatorSqlmap = new GeneratorDisplay();
            generatorSqlmap.generator();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

2.3 对应修改的地方

3. 主项目中步骤

3.1 在父项目中补充pom依赖

     <!-- 通用mapper逆向工具 -->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper-spring-boot-starter</artifactId>
            <version>2.1.5</version>
        </dependency>

3.2 生成的将项目复制到主项目中(包括MyMapper接口类)

3.3 在yml文件中引入通用mapper配置

############################################################
#
# mybatis mapper 配置
#
############################################################
# 通用 Mapper 配置
mapper:
  mappers: com.lv.my.mapper.MyMapper # 需要创建此路径
  not-empty: false # 在进行数据库操作的时候，判断表达式 username!=null 是否会追加 username!=''
  identity: MYSQL

注意：mapper.mapper需要手动创建此层级，并拷贝MyMapper.java（逆向生成工具中的文件）到此路径中

4. 运行检验

先打开日志

重新install

Java单体架构

单体架构项目开发六：MyBatis逆向生成工具Mybatis-generator