Spring Cloud Alibaba和Spring Cloud 整合主要就是要注意版本之间的互通性。
https://github.com/alibaba/spring-cloud-alibaba/wiki/%E7%89%88%E6%9C%AC%E8%AF%B4%E6%98%8E
这个就是Spring Cloud Alibaba官方提供的版本对照。

1.Spring Cloud Alibaba、Spring Cloud、Spring Boot之间的版本对照

（最新的请点击网址）

image.png

2.Spring Cloud Alibaba和其他组建的版本对照

image.png

这里要注意你的组建版本和服务版本也要尽量一样（eg：nacos的jar版本和nacos的安装版本不要差距太多，最好是一样的大版本。）

3.创建一个maven项目

mavne配置文件
这里面有很多别的配置，要是不用可以酌情删减

<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>

    <groupId>com.demo</groupId>
    <artifactId>demo-roll</artifactId>
    <version>1.0.0-SNAPSHOT</version>

    <modules>
        <!-- 这里是子项目的 artifactId -->
    </modules>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>8</java.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>


        <!-- 公共依赖 -->
        <lombok.version>1.18.12</lombok.version>
        <slf4j.version>1.7.30</slf4j.version>
        <fastjson.version>1.2.73</fastjson.version>
        <hutool.version>5.7.18</hutool.version>
        <easyCaptcha.version>1.6.2</easyCaptcha.version>
        <springContext.version>5.2.8.RELEASE</springContext.version>
        <!-- 公共依赖 -->

        <!--  spring -->
        <springboot.version>2.3.2.RELEASE</springboot.version>
        <springcloud.version>Hoxton.SR9</springcloud.version>
        <springcloud-alibaba.version>2.2.6.RELEASE</springcloud-alibaba.version>
        <springboot-elasticsearch.version>2.6.3</springboot-elasticsearch.version>
        <springboot-elasticsearch-client.version>7.15.2</springboot-elasticsearch-client.version>
        <!--  spring -->

        <commons-collections4.version>4.4</commons-collections4.version>
        <commons-lang3.version>3.12.0</commons-lang3.version>
        <commons-beanutils.version>1.9.4</commons-beanutils.version>
        <commons-io.version>2.7</commons-io.version>
        <Junit.version>4.13</Junit.version>

        <redisson.version>3.13.4</redisson.version>
        <mybatisplus.version>3.5.0</mybatisplus.version>
        <mybatisplus.generator.version>3.5.1</mybatisplus.generator.version>
        <druid.version>1.2.8</druid.version>
        <alibabaTTL.version>2.11.5</alibabaTTL.version>
        <postgresql.version>42.2.12</postgresql.version>
        <jjwt.version>0.9.1</jjwt.version>

        <springfox.version>3.0.0</springfox.version>
        <easyexcel.version>2.2.6</easyexcel.version>

    </properties>

    <!-- 公共依赖 -->
    <dependencies>
        <!-- lombok java工具类库  -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
        </dependency>
        <!-- slf4j java工具类库  -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <!-- fastjson java工具类库  -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>${fastjson.version}</version>
        </dependency>
        <!-- hutool java工具类库  -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>${hutool.version}</version>
        </dependency>
        <!-- 验证码生成工具 -->
        <dependency>
            <groupId>com.github.whvcse</groupId>
            <artifactId>easy-captcha</artifactId>
            <version>${easyCaptcha.version}</version>
        </dependency>
        <!-- springContext -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${springContext.version}</version>
        </dependency>

    </dependencies>
    <!-- 公共依赖 -->

    <dependencyManagement>
        <dependencies>
            <!-- springboot 2.3.12.RELEASE -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${springboot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!-- springcloud Hoxton.SR12 -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${springcloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!-- springcloud cloud alibaba 2.2.7.RELEASE -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${springcloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!-- 自省和监控的集成功能 -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <!-- 注册中心 -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-nacos-discovery</artifactId>
            </dependency>
            <!-- 配置中心 -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-nacos-config</artifactId>
            </dependency>
            <!-- 熔断降级 -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
            </dependency>
            <!-- api网关 -->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-gateway</artifactId>
            </dependency>
            <!-- elasticsearch -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
                <version>${springboot-elasticsearch.version}</version>
            </dependency>
            <!-- elasticsearch-client -->
            <dependency>
                <groupId>org.elasticsearch.client</groupId>
                <artifactId>elasticsearch-rest-high-level-client</artifactId>
                <version>${springboot-elasticsearch-client.version}</version>
            </dependency>


            <!--提供了对于JavaBean进行各种操作，克隆对象,属性等等.-->
            <dependency>
                <groupId>commons-beanutils</groupId>
                <artifactId>commons-beanutils</artifactId>
                <version>${commons-beanutils.version}</version>
            </dependency>

            <dependency>
                <groupId>commons-io</groupId>
                <artifactId>commons-io</artifactId>
                <version>${commons-io.version}</version>
            </dependency>

            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-lang3</artifactId>
                <version>${commons-lang3.version}</version>
            </dependency>

            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-collections4</artifactId>
                <version>${commons-collections4.version}</version>
            </dependency>

            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${Junit.version}</version>
                <scope>test</scope>
            </dependency>
            
            <!--jsonwebtoken-->
            <dependency>
                <groupId>io.jsonwebtoken</groupId>
                <artifactId>jjwt</artifactId>
                <version>${jjwt.version}</version>
            </dependency>

            <!--redisson-->
            <dependency>
                <groupId>org.redisson</groupId>
                <artifactId>redisson-spring-boot-starter</artifactId>
                <version>${redisson.version}</version>
            </dependency>
            
            <!--mybatis-->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatisplus.version}</version>
            </dependency>
            
            <!--mybatis代码生成器-->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-generator</artifactId>
                <version>${mybatisplus.generator.version}</version>
            </dependency>
            
            <!--druid 连接池-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>${druid.version}</version>
            </dependency>
            
            <!--transmittable-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>transmittable-thread-local</artifactId>
                <version>${alibabaTTL.version}</version>
            </dependency>
            
            <!--PostgreSql-->
            <dependency>
                <groupId>org.postgresql</groupId>
                <artifactId>postgresql</artifactId>
                <version>${postgresql.version}</version>
            </dependency>

            <!--swagger-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>${springfox.version}</version>
            </dependency>
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>${springfox.version}</version>
            </dependency>
            
            <!--easyexcel-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>easyexcel</artifactId>
                <version>${easyexcel.version}</version>
            </dependency>


        </dependencies>
    </dependencyManagement>


    <repositories>
        <repository>
            <id>aliyun</id>
            <name>aliyun-maven</name>
            <url>https://maven.aliyun.com/repository/central</url>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://maven.aliyun.com/repository/spring</url>
        </repository>
    </repositories>

</project>

然后创建子项目就可以了