</properties>

        <repositories><!-- 代码库 -->

          <repository>

            <id>maven-ali</id>

           <url>http://maven.aliyun.com/nexus/content/groups/public//</url>

       <releases>

              <enabled>true</enabled>

          </releases>

        <snapshots>

        <enabled>true</enabled>

             <updatePolicy>always</updatePolicy>

              <checksumPolicy>fail</checksumPolicy>

        </snapshots>

         </repository>

    </repositories>