一、创建父工程boot-parent

创建一个SpringBoot父项目，只保留pom.xml，并导入工程中用到的所有依赖

	org.springframework.bootspring-boot-starter-webcom.baomidoumybatis-plus-boot-starter3.5.1org.projectlomboklombok1.18.20mysqlmysql-connector-java8.0.32

二、创建子工程

2.1、创建控制器子工程gaofeng-admin

创建一个admin子模块，用于添加配置文件、实现Controller层的作用

2.1.1、application.yml

在配置文件中管理整个工程的配置项

server:port: 8070
spring:datasource:type: com.zaxxer.hikari.HikariDataSourcedriver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://127.0.01:3306/t_mybatis?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8&allowPublicKeyRetrieval=trueusername: rootpassword: Aa123123.
mybatis-plus:type-aliases-package: demo.entityconfiguration:log-impl: org.apache.ibatis.logging.stdout.StdOutImplglobal-config:db-config:table-prefix: t_id-type: automapper-locations: classpath:mappers/*.xml

2.2、创建系统子工程gaofeng-system

创建一个system子工程，用于实现实体层、DAO层、Service层的开发

2.2.1、实体层User

package demo.entity;import lombok.Data;@Data
public class User {private String userName;private String passwd;
}

2.2.2、DAO层UserMapper

package demo.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import demo.entity.User;
import org.springframework.stereotype.Repository;@Repository
public interface UserMapper extends BaseMapper {
}

2.2.3、Service层UserService

package demo.service;import demo.entity.User;import java.util.List;public interface UserService {List findAll();
}

package demo.service.imp;import demo.entity.User;
import demo.mapper.UserMapper;
import demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;@Service
public class UserServiceImpl implements UserService {@Autowiredprivate UserMapper userMapper;@Overridepublic List findAll() {return userMapper.selectList(null);}
}

2.3、在控制器子工程中添加系统子工程的依赖

由于控制器子工程实现的是Controller层的功能，需要依赖系统子工程的Service层功能，所以需要在控制器子工程中通过dependency标签添加系统子工程的依赖

2.3.1、添加依赖

gaofeng-admin/pom.xml

	com.examplegaofeng-system0.0.1-SNAPSHOT

2.3.2、完成Controller层的功能

package demo.controller;import demo.entity.User;
import demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.List;@RestController
public class UserController {@Autowiredprivate UserService userService;@GetMapping("/list")public List findAll(){return userService.findAll();}
}

三、附录

3.1、项目源代码

3.2、父工程完整pom.xml

4.0.0pomgaofeng-admingaofeng-systemorg.springframework.bootspring-boot-starter-parent2.7.9 com.exampleboot-parent0.0.1-SNAPSHOTboot-parentDemo project for Spring Boot1.8org.springframework.bootspring-boot-starter-webcom.baomidoumybatis-plus-boot-starter3.5.1org.projectlomboklombok1.18.20mysqlmysql-connector-java8.0.32org.springframework.bootspring-boot-maven-plugin