SpringBoot父子工程搭建

SpringBoot项目创建图解

项目名称为:demo
点击next后根据所需自行填写相应信息，这里不做过多介绍

删除多余的文件

子模块创建图解

直接点击下方Finish，完成子模块创建
依次创建dao/biz/web子模块

demo父项目

demo父项目主要用于版本控制
pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>pom</packaging>
    <modules>
        <module>demo-dao</module>
        <module>demo-biz</module>
        <module>demo-web</module>
    </modules>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <demo.version>0.0.1-SNAPSHOT</demo.version>
        <springboot.version>2.2.2.RELEASE</springboot.version>
        <mybatis.version>2.0.0</mybatis.version>
        <mysql-connector.version>5.1.32</mysql-connector.version>
        <lombok.version>1.16.18</lombok.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.example</groupId>
                <artifactId>demo-dao</artifactId>
                <version>${demo.version}</version>
            </dependency>
            <dependency>
                <groupId>com.example</groupId>
                <artifactId>demo-biz</artifactId>
                <version>${demo.version}</version>
            </dependency>
            <dependency>
                <groupId>com.example</groupId>
                <artifactId>demo-web</artifactId>
                <version>${demo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
                <version>${springboot.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>${mybatis.version}</version>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql-connector.version}</version>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

dao子模块

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>demo</artifactId>
        <groupId>com.example</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>demo-dao</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

</project>

这里properties命名方式是为了方便多配置文件管理
application-dao.properties

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

可通过Mybatis逆向工程生成相应的实体，接口，配置文件这里不做介绍
详情请参考–>http://mybatis.org/generator/quickstart.html

biz子模块

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>demo</artifactId>
        <groupId>com.example</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>demo-biz</artifactId>

    <dependencies>
    	<!-- biz模块依赖dao模块 -->
        <dependency>
            <groupId>com.example</groupId>
            <artifactId>demo-dao</artifactId>
        </dependency>
    </dependencies>

</project>

DemoService 接口

package com.demo.biz.service;

public interface DemoService {
    String test();
}

DemoService 接口实现类

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;

    @Override
    public String test() {
        Good good = goodMapper.selectByPrimaryKey("1");
        return good.toString();
    }
}

web子模块

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>demo</artifactId>
        <groupId>com.example</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>demo-web</artifactId>

    <dependencies>
    	<!-- web依赖biz -->
        <dependency>
            <groupId>com.example</groupId>
            <artifactId>demo-biz</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

</project>

application.properties配置文件
使用spring.profiles.active区分不同环境下的配置文件(多文件配置)

spring.profiles.active=dao

server.port=80

启动类：DemoWebApplication.java
扫描com.demo路径
@SpringBootApplication(scanBasePackages = “com.demo”)
扫描mapper接口
@MapperScan(“com.demo.dao.mapper”)

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访问

package com.demo.web.controll;

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.RequestMapping;
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