如何编译Vaadin 8应用程序，因为它已停产
我怀疑这与最近停产的Vaadin 8有关。我正在尝试运行vaadin 8参考应用程序，以作为升级为vaadin流量的升级工作的一部分，今天开始给我Maven编译错误，即Vaadin 8不再可用。在com.vaadin：vaadin-charts上收集依赖项，依此类推。所有Vaadin 8依赖项（包括所有Vaadin 8插件库）也发生了这种情况。我需要在我的IDE中运行参考应用程序，但找不到任何方法。
I suspect this is related to Vaadin 8 recently being discontinued. I'm trying to run a Vaadin 8 reference application as part of an upgrade effort to Vaadin Flow and today it's starting to give me maven compile errors that the dependencies are no longer available for Vaadin 8. For example I got the error "Failed to collect dependencies at com.vaadin:vaadin-charts" and so on with the details of the version. This is also happening for all Vaadin 8 dependencies, including all Vaadin 8 addons libraries. I need to run the reference application in my IDE but cannot find any way to do so.
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Vaadin 8的最后一个免费公开版本是8.14.3版。该版本在Maven Central不会被删除。因此，这仍然是可用的。
The last free public release of Vaadin 8 is version 8.14.3. The release is in maven central is not going to be removed. So it remains to be usable.
事实证明，问题是升级到 Maven 3.8.1（通过 Intellij 升级）以及使用
http获取 vaadin 插件库的旧版pom.xml的组合。版本 8。要更正它，我必须在pom.xml中更改以下内容：特别注意
https而不是http。话虽这么说，我对 Vaadin 图表仍然存在一个问题，即不再识别类
com.vaadin.addon.charts.model.style.SolidColor唯一可行的解决方案是恢复到 Maven 3.6.3因为即使 https 更改，我也无法使用 Maven 3.8.1 完全解决它。
Turns out the issue was a combination of upgrading to Maven 3.8.1 (through an Intellij upgrade) as well as an older
pom.xmlusinghttpfor the vaadin addons library from version 8. To correct it I had to change the following in mypom.xml:Specifically notice the
<url>hashttpsrather thanhttp.That being said I still have a remaining issue with Vaadin charts that no longer recognizes the class
com.vaadin.addon.charts.model.style.SolidColorThe only working solution was to revert to Maven 3.6.3 as I could not make fully resolve it with Maven 3.8.1 even with the https change.