mysql:mysql-connector-java:pom:unknown failed to transfer from https://maven.mangoautomation.net/repository/ias-release/ during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of ias-releases has elapsed or updates are forced. Original error: Could not transfer artifact mysql:mysql-connector-java:pom:unknown from/to ias-releases (https://maven.mangoautomation.net/repository/ias-release/): transfer failed for https://maven.mangoautomation.net/repository/ias-release/mysql/mysql-connector-java/unknown/mysql-connector-java-unknown.pom 尝试使用 -U 标记(强制更新快照)运行 Maven 导入

这个错误提示表明Maven无法从https://maven.mangoautomation.net/repository/ias-release/下载mysql:mysql-connector-java:pom:unknown的依赖包，可能是由于网络连接问题或者远程仓库服务器出现故障导致的。

你可以尝试使用-Maven的-U（强制更新快照）选项来强制更新依赖项。你可以在命令行中运行以下命令：

mvn clean install -U

如果这个问题仍然存在，你可以检查你的网络连接或者尝试更改你的仓库配置，或者更换其他的仓库源来下载mysql:mysql-connector-java:pom:unknown的依赖包。