springboot多模块项目搭建

 

最近闲来无事,搭建了一个多模块的框架,使用框架技术为springboot、jpa、mysql,框架结构层次如图:

springboot多模块项目搭建_第1张图片

 

 

 

 

 

 

 

 

 

 

 

 

1、搭建步骤:

(1)新建父工程File->New->Project,如图:

springboot多模块项目搭建_第2张图片

 

 

 

 

 

 

 

 

 

 

 

 

 

 

springboot多模块项目搭建_第3张图片

 

 

 

 

 

 

 

 

 

 

 

 

 

填写对应的GroupId和ArtifactId,点击next,然后finish。

(2)在新建的父工程上单击右键new->module,新建子模块service,web,dao,common

(3)在父工程的pom.xml中添加所需的依赖,如下:



    4.0.0

    com.tian
    springboot-jpa
    pom
    1.0-SNAPSHOT
    
        springboot-web
        springboot-service
        springboot-dao
        springboot-common
    

    
        
            
            
                org.springframework.boot
                spring-boot-starter-web
                2.1.0.RELEASE
            
            
            
                org.springframework.boot
                spring-boot-starter-test
                2.1.0.RELEASE
                test
            
            
            
                org.springframework.boot
                spring-boot-starter-data-jpa
                2.1.0.RELEASE
            
            
            
                mysql
                mysql-connector-java
                8.0.13
            
            
            
                org.projectlombok
                lombok
                1.18.4
                provided
            
        
    

这里只是添加了很少的一部分依赖,请按需添加;dependencyManagement标签不知道用法的请自行百度,这里不做过多的表述。

(4)在web子模块中的pom.xml中添加依赖,如下:



    
        springboot-jpa
        com.tian
        1.0-SNAPSHOT
    
    4.0.0

    springboot-web

    
        
            com.tian
            springboot-service
            1.0-SNAPSHOT
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-test
        

    

(5)在service子模块的pom.xml中添加依赖:



    
        springboot-jpa
        com.tian
        1.0-SNAPSHOT
    
    4.0.0

    springboot-service

    
        
            com.tian
            springboot-dao
            1.0-SNAPSHOT
        
    

(6)在dao子模块中的pom.xml中添加依赖,如下:



    
        springboot-jpa
        com.tian
        1.0-SNAPSHOT
    
    4.0.0

    springboot-dao

    
        
            com.tian
            springboot-common
            1.0-SNAPSHOT
        
        
            org.springframework.boot
            spring-boot-starter-data-jpa
        
        
            mysql
            mysql-connector-java
        
        
            org.projectlombok
            lombok
        
    

(7)在common子模块的pom.xml中添加依赖,如下:



    
        springboot-jpa
        com.tian
        1.0-SNAPSHOT
    
    4.0.0

    springboot-common

    
        
            org.projectlombok
            lombok
        
    

到此,框架的大体结构基本完成,但是由于是springboot项目,所以还需要在web子模块中添加启动类,web的结构如下图:

springboot多模块项目搭建_第4张图片

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

其中SpringWebApplication.class就是启动类,代码如下:

package com.tian.springbootweb;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;

@SpringBootApplication
@ComponentScan(basePackages = {"com.tian.springbootservice","com.tian.springbootweb"})
@EnableJpaRepositories(value = {"com.tian.springbootdao.repository"})
@EntityScan(value = {"com.tian.springbootdao.entity"})
public class SpringWebApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringWebApplication.class,args);
    }

}

@ComponentScan注解是为了扫描service和controlelr文件

@EnableJpaRepositories注解扫描repository文件

@EntityScan注解扫描entity文件

application.properties配置文件:

# 服务端口
server.port=8082
# 数据库链接驱动
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
# 数据库url
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/springboot?useUnicode=true&characterEncoding=UTF8&useSSL=false&serverTimezone=Asia/Shanghai
# 数据库用户名
spring.datasource.username=root
# 数据库密码
spring.datasource.password=root

# 数据库类型
spring.jpa.database=mysql
# 显示sql语句
spring.jpa.show-sql=true
# 更新表结构
spring.jpa.hibernate.ddl-auto=update
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect

至此框架已经搭建完成

下面新建测试文件:

新建controller文件:

package com.tian.springbootweb.controller;

import com.tian.springbootdao.entity.User.UserEntity;
import com.tian.springbootservice.User.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 {

    private UserService userService;

    @Autowired
    public UserController(UserService userService){
        this.userService = userService;
    }

    @GetMapping(value = "/users")
    public List getUsers(){
        return userService.getUsers();
    }

}

新建service文件:

package com.tian.springbootservice.User;

import com.tian.springbootdao.entity.User.UserEntity;
import com.tian.springbootdao.repository.User.UserRepository;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserService {

    private UserRepository userRepository;
    public UserService(UserRepository userRepository){
        this.userRepository = userRepository;
    }

    public List getUsers(){
        return userRepository.findAll();
    }

}

新建UserRepository文件:

package com.tian.springbootdao.repository.User;

import com.tian.springbootdao.entity.User.UserEntity;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

public interface UserRepository extends JpaRepository {
}

新建UserEntity文件:

package com.tian.springbootdao.entity.User;

import lombok.Data;

import javax.persistence.*;
import java.io.Serializable;

@Entity
@Table(name = "t_user")
@Data
public class UserEntity implements Serializable {

    @Id
    @GeneratedValue
    private Long id;

    @Column(name = "name")
    private String name;

    @Column(name = "age")
    private String age;

    @Column(name = "grade")
    private String grade;

}

启动服务,访问地址:http://localhost:8082/users,结果如图:

springboot多模块项目搭建_第5张图片

 

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