一、Spring Cloud Alibaba项目，父工程搭建

1、版本选择

SpringCloudAlibaba官方整理的版本说明：

https://github.com/alibaba/spring-cloud-alibaba/wiki/%E7%89%88%E6%9C%AC%E8%AF%B4%E6%98%8E

适配 Spring Boot 为 2.4, Spring Cloud Hoxton 版本及以下的 Spring Cloud Alibaba 版本如下表（最新版本用*标记）： 

Spring Cloud Alibaba Version	Spring Cloud Version	Spring Boot Version
2.2.8.RELEASE*	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.7.RELEASE	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.6.RELEASE	Spring Cloud Hoxton.SR9	2.3.2.RELEASE
2.1.4.RELEASE	Spring Cloud Greenwich.SR6	2.1.13.RELEASE
2.2.1.RELEASE	Spring Cloud Hoxton.SR3	2.2.5.RELEASE
2.2.0.RELEASE	Spring Cloud Hoxton.RELEASE	2.2.X.RELEASE
2.1.2.RELEASE	Spring Cloud Greenwich	2.1.X.RELEASE
2.0.4.RELEASE(停止维护，建议升级)	Spring Cloud Finchley	2.0.X.RELEASE
1.5.1.RELEASE(停止维护，建议升级)	Spring Cloud Edgware	1.5.X.RELEASE

 组件版本关系：

Spring Cloud Alibaba Version	Sentinel Version	Nacos Version	RocketMQ Version	Dubbo Version	Seata Version
2.2.8.RELEASE	1.8.4	2.1.0	4.9.3	~	1.5.1
2021.0.1.0	1.8.3	1.4.2	4.9.2	~	1.4.2
2.2.7.RELEASE	1.8.1	2.0.3	4.6.1	2.7.13	1.3.0
2.2.6.RELEASE	1.8.1	1.4.2	4.4.0	2.7.8	1.3.0
2021.1 or 2.2.5.RELEASE or 2.1.4.RELEASE or 2.0.4.RELEASE	1.8.0	1.4.1	4.4.0	2.7.8	1.3.0
2.2.3.RELEASE or 2.1.3.RELEASE or 2.0.3.RELEASE	1.8.0	1.3.3	4.4.0	2.7.8	1.3.0
2.2.1.RELEASE or 2.1.2.RELEASE or 2.0.2.RELEASE	1.7.1	1.2.1	4.4.0	2.7.6	1.2.0
2.2.0.RELEASE	1.7.1	1.1.4	4.4.0	2.7.4.1	1.0.0
2.1.1.RELEASE or 2.0.1.RELEASE or 1.5.1.RELEASE	1.7.0	1.1.4	4.4.0	2.7.3	0.9.0
2.1.0.RELEASE or 2.0.0.RELEASE or 1.5.0.RELEASE	1.6.3	1.1.1	4.4.0	2.7.3	0.7.1

 

2、确定版本

Spring Cloud：Spring Cloud Hoxton.SR12

Spring Cloud Alibaba：2.2.8.RELEASE

Spring Boot：2.3.12.RELEASE

 

3、搭建

（1）新建一个maven项目，删除不必要文件，最终目录结构

（2）修改POM文件 

<?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>

    <groupId>com.shiwn</groupId>
    <artifactId>spring-cloud-alibaba</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-cloud-alibaba</name>
    <packaging>pom</packaging>
    <description>Demo project for Spring Boot</description>

    <properties>
        <!-- java版本 -->
        <java.version>1.8</java.version>
        <!-- SpringBoot 版本 -->
        <spring.boot.version>2.3.12.RELEASE</spring.boot.version>
        <!-- Spring Cloud Alibaba 版本 -->
        <spring.cloud.alibaba>2.2.8.RELEASE</spring.cloud.alibaba>
        <!-- Spring Cloud 版本 -->
        <spring.cloud>Hoxton.SR12</spring.cloud>
    </properties>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <!-- 版本依赖统一管理 -->
    <dependencyManagement>
        <dependencies>
            <!-- SpringBoot 版本 -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-parent</artifactId>
                <version>${spring.boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- Spring Cloud Alibaba 版本 -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring.cloud.alibaba}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- Spring Cloud 版本 -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring.cloud}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>