环境

JDK1.8
IntelliJ IDEA
Maven-3.3.9

项目结构

sca
···sca-common·························································公共模块
······sca-common-base··············································公共基础模块
···sca-job······························································· 分布式任务调度模块
···sca-api································································业务接口定义模块
······sca-api-normal···················································标准业务接口模块
······sca-api-taobao···················································淘宝订单业务接口模块
···sca-rest·······························································服务实现模块
······sca-rest-normal··················································标准业务实现模块
······sca-rest-taobao··················································淘宝订单业务实现模块
···sca-gateway·························································路由网关模块

创建根项目

打开IDEA，选择File > New > Project

选择Maven>Next，然后输入自己喜欢的GroupId 和 ArtifactId

修改 sca 主模块的 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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ldh</groupId>
    <artifactId>sca</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>

    <description>springCloud-alibaba</description>
    <modules>
        <module>sca-common</module>
        <module>sca-rest</module>
        <module>sca-api</module>
        <module>sca-job</module>
        <module>sca-gateway</module>
    </modules>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.11.RELEASE</version>
    </parent>

    <properties>
        <!-- 基本属性 -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <java.version>1.8</java.version>
        <!-- 版本属性 -->
        <spring-cloud-alibaba.version>2.1.0.RELEASE</spring-cloud-alibaba.version>
        <spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
        <spring-boot.version>2.1.7.RELEASE</spring-boot.version>
        <spring-platform.version>Cairo-SR8</spring-platform.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <!-- spring-cloud-alibaba 总依赖 -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--支持Spring Boot 2.1.X-->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--Greenwich.RELEASE-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--
            Spring IO Platform，简单的可以认为是一个依赖维护平台，该平台将相关依赖汇聚到一起，针对每个依赖，都提供了一个版本号
            完整的依赖列表 https://docs.spring.io/platform/docs/current/reference/html/appendix-dependency-versions.html
             -->
            <dependency>
                <groupId>io.spring.platform</groupId>
                <artifactId>platform-bom</artifactId>
                <version>${spring-platform.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <!-- 子项目公共依赖的jar包 -->
    <dependencies>
        <!-- nacos discovery -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- lombok插件 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- Swagger SpringBoot -->
        <dependency>
            <groupId>com.spring4all</groupId>
            <artifactId>swagger-spring-boot-starter</artifactId>
            <version>1.7.0.RELEASE</version>
        </dependency>
    </dependencies>

</project>

其中SpringBoot选择2.1.11.RELEASE 版，SpringCloud选择Greenwich.RELEASE版，两者版本匹配度参考如下表格

分别创建其余子模块

其中注意创建子Module的时候，建议Project Name 最好和 ArtifactId 保持一致。
最终项目结构如下图