spring-cloud-starter-alibaba-nacos-discovery在maven中找不到的问题以及解决方法

 dependency>
     groupId>com.alibaba.cloudgroupId>
     artifactId>spring-cloud-starter-alibaba-nacos-discoveryartifactId>
 dependency>

项目中pom.xml直接用这个maven会报
Could not find artifact com.alibaba.cloud:spring-cloud-starter-alibaba-nacos-discovery:pom:unknown in aliyun-public (https://maven.aliyun.com/repository/public)

试了几种方法包括：

1. 指定版本为1.4.1
2. 在.m2/settings.xml里添加新的阿里云源
3. Invalid cache重启
4. maven clean

发现都没用。最终解决方法是在pom的dependencyManagement添加

    dependencyManagement>
        dependencies>
            dependency>
                groupId>org.springframework.cloudgroupId>
                artifactId>spring-cloud-dependenciesartifactId>
                version>${spring-cloud.version}version>
                type>pomtype>
                scope>importscope>
            dependency>
            dependency>
                groupId>com.alibaba.cloudgroupId>
                artifactId>spring-cloud-alibaba-dependenciesartifactId>
                version>${spring-cloud-alibaba.version}version>
                type>pomtype>
                scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>

${spring-cloud-alibaba.version} 要根据对应的springboot版本来选。详见springcloud alibaba 版本说明