maven引入springcloud报错，求解决方案

maven项目引入springcloud相关jar报错

            <parent>标签标错
    For artifact {org.springframework.cloud:spring-cloud-starter-consul-discovery:null:jar}: The version cannot be empty. (org.apache.maven.plugins:maven-resources-plugin:3.0.1:testResources:default-testResources:process-test-resources)

            <dependency>标签报错
            Project build error: Non-resolvable import POM: Failure to find org.springframework.cloud:spring-cloud-dependencies:pom:Finchley.M7 in http://maven.aliyun.com/nexus/content/groups/public was cached in the local repository, resolution will not be reattempted until the update interval of window-aliyun has elapsed or updates are forced

所料不错应该是没有写 <version></version>

第一个是标签报错，提示version不能为空，说明你的引用没有version标签
第二个是报错，提示spring-cloud-dependencies找不到，本地是否没缓存？

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
</parent>

    <dependencies>
    <!-- 支持zuul网关 -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
    </dependency>
    <!-- SpringBoot整合eureka客户端 -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>

    。。。。。