maven项目的pom.xml文件出现红色错误提示：ArtifactTransferException: Failure to transfer

maven项目的pom.xml文件出现红色错误提示，鼠标放上去提示：

ArtifactTransferException: Failure to transfer org.deeplearning4j:deeplearning4j-ui-model:jar:0.7.1 from http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.deeplearning4j:deeplearning4j-ui-model:jar:0.7.1 from/to central (http://repo.maven.apache.org/maven2): The operation was cancelled.

原因是maven本地仓库没有对应的jar包，需要需maven中央库下载下来，操作如下：

项目右键，使用maven插件clean一下然后再install一下就好了，会自动从网络上下载jar包到本地仓库，下载完后刷新一下项目即可。