本文共 4465 字，大约阅读时间需要 14 分钟。

Spring Boot 多模块项目搭建指南

项目结构

本项目采用模块化设计，通过Maven管理多个子模块，实现高效的项目维护和管理。项目结构如下：

├── demo-parent
│   ├── demo-dao
│   │   ├── pom.xml
│   │   └── application-dao.properties
│   ├── demo-biz
│   │   ├── pom.xml
│   │   ├── DemoService.java
│   │   └── DemoServiceImpl.java
│   └── demo-web
│       ├── pom.xml
│       ├── DemoController.java
│       └── application.properties

父项目配置

父项目demo-parent的pom.xml配置如下：

   
    
    
     4.0.0
    
    
    
     jar
    
    
    
        
     
      demo-dao
     
        
     
      demo-biz
     
        
     
      demo-web
     
    
    
    
    
        
     
      org.springframework.boot
     
        
     
      spring-boot-starter-parent
     
        
     
      2.2.2.RELEASE
     
        
     
      ../
     
    
    
    
    
     com.example
    
    
    
     demo
    
    
    
     0.0.1-SNAPSHOT
    
   

子模块创建

1. Dao模块

pom.xml

   
    
    
        
     
      demo
     
        
     
      com.example
     
        
     
      0.0.1-SNAPSHOT
     
    
    
    
    
     4.0.0
    
    
    
     demo-dao
    
    
    
        
     
            
      
       org.mybatis.spring.boot
      
            
      
       mybatis-spring-boot-starter
      
            
      
       ${mybatis.version}
      
        
     
        
     
            
      
       mysql
      
            
      
       mysql-connector-java
      
            
      
       ${mysql-connector.version}
      
        
     
        
     
            
      
       org.project.lombok
      
            
      
       lombok
      
            
      
       ${lombok.version}
      
        
     
    
    
   

应用配置

spring.datasource.driver-class-name=com.mysql.jdbc.Driverspring.datasource.url=jdbc:mysql://localhost:3306/goods?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8spring.datasource.username=rootspring.datasource.password=rootmybatis.mapper-locations=classpath:mybatis/*.xmlmybatis.type-aliases-package=com.demo.dao.entity

2. Biz模块

pom.xml

   
    
    
        
     
      demo
     
        
     
      com.example
     
        
     
      0.0.1-SNAPSHOT
     
    
    
    
    
     4.0.0
    
    
    
     demo-biz
    
    
    
        
     
            
      
       com.example
      
            
      
       demo-dao
      
            
      
       ${demo.version}
      
        
     
    
    
   

服务接口与实现

package com.demo.biz.service;
public interface DemoService {
    String test();
}

package com.demo.biz.service.impl;
import com.demo.biz.service.DemoService;
import com.demo.dao.entity.Good;
import com.demo.dao.mapper.GoodMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class DemoServiceImpl implements DemoService {
    @Autowired
    private GoodMapper goodMapper;
    public String test() {
        Good good = goodMapper.selectByPrimaryKey("1");
        return good.toString();
    }
}

3. Web模块

pom.xml

   
    
    
        
     
      demo
     
        
     
      com.example
     
        
     
      0.0.1-SNAPSHOT
     
    
    
    
    
     4.0.0
    
    
    
     demo-web
    
    
    
        
     
            
      
       com.example
      
            
      
       demo-biz
      
            
      
       ${demo.version}
      
        
     
        
     
            
      
       org.springframework.boot
      
            
      
       spring-boot-starter-web
      
            
      
       ${springboot.version}
      
        
     
    
    
   

Web应用配置

package com.demo.web;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication(scanBasePackages = "com.demo")
@MapperScan("com.demo.dao.mapper")
public class DemoWebApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoWebApplication.class, args);
    }
}

Web控制器

package com.demo.web.controller;
import com.demo.biz.service.DemoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("demo")
public class DemoController {
    @Autowired
    private DemoService demoService;
    @GetMapping("test")
    public String test() {
        return demoService.test();
    }
}

运行说明

mvn spring-boot:run

2. 访问地址：
• http://localhost:8080/demo/test

以上配置文件和项目结构可根据实际需求进行修改和扩展，方便多环境配置管理，确保代码的可维护性和可扩展性。