问题
While installing Visual Studio 2017 I encountered the error while downloading the JDKV2-Component for Xamarin (maybe someone could edit the English error message in?):
Paket "JavaJDKV2,version=1.8.2,chip=x86" konnte von "https://go.microsoft.com/fwlink/?linkid=863182" nicht heruntergeladen werden. Such-URL https://aka.ms/VSSetupErrorReports?q=PackageId=JavaJDKV2;PackageAction=DownloadPackage;ReturnCode=0x80072ee2 Details WebClient-Download fehlgeschlagen: Timeout für Vorgang überschritten Bits-Download fehlgeschlagen: Fehlerkontext: BG_ERROR_CONTEXT_REMOTE_FILE, Fehlercode: -2145844841 WinInet-Download fehlgeschlagen: Function: InternetOpenUrl, HR: -2147012894, Message: Unknown error 12002 Betroffene Workloads Mobile-Entwicklung mit .NET (Microsoft.VisualStudio.Workload.NetCrossPlat,version=15.0.27128.1) Mobile-Entwicklung mit C++ (Microsoft.VisualStudio.Workload.NativeMobile,version=15.0.27005.2) Mobile-Entwicklung mit JavaScript (Microsoft.VisualStudio.Workload.WebCrossPlat,version=15.0.27019.1) Betroffene Komponenten Android SDK-Einrichtung (API-Ebene 23) (globale Installation) (Component.Android.SDK23,version=15.0.27128.1) Android SDK-Setup (API-Ebene 19 und 21) (Component.Android.SDK19,version=15.0.27128.1) Android SDK-Setup (API-Ebene 22) (Component.Android.SDK22,version=15.0.27128.1) Google Android-Emulator (API-Ebene 23) (globale Installation) (Component.Google.Android.Emulator.API23.V2,version=15.0.27128.1) Java SE Development Kit (8.0.1120.15) (Component.JavaJDK,version=15.0.26403.0)
Same for the x64-version of the JDK.
It turned out that the Oracle-Website needs a License-Accepted-cookie to download the files. While Microsoft seemingly tried to add it to the download routine it doesn't work for me and the installation won't proceed beyond the point where it tries to install the JDK.
So I downloaded the files manually. But where do I have to put them so that the Visual Studio installation knows that it won't need to download them again?
回答1:
While searching the web for some hours I finally found the solution here: https://developercommunity.visualstudio.com/content/problem/160625/packageidjavajdkv2packageactiondownloadpackageretu-5.html
Turns out you have to search for the following folder:
C:\ProgramData\Microsoft\VisualStudio\Packages
There you create a subfolder with the package name as written in the error message/error log (in my case "JavaJDKV2,version=1.8.2,chip=x86") and put the manually downloaded .exe file in there.
Restart the VS-installer and start the installation process.
来源：https://stackoverflow.com/questions/47808844/how-to-manually-download-components-for-the-vs-2017-installation