尽管路径正确，但无法使用 Grails

Question

我正在尝试在工作时在我的计算机上设置 Grails 运行ning Windows 10，但我无法这样做。我已经从网站 (3.3.8) 下载了最新版本，在我的帐户中添加了一个 GRAILS_HOME 变量，指向解压缩的 Grails 目录，并将其 bin 子目录的路径添加到系统路径，而 grails -v 工作并输出 Grails 的版本，Gradle 和 Java 正确，基本上没有其他命令。

当我尝试使用 grails create-app someApp 创建一些示例应用程序时，我得到 | Error Error initializing classpath: services.gradle.org 和这样的跟踪：

| Resolving Dependencies. Please wait...
Downloading https://services.gradle.org/distributions/gradle-3.5-bin.zip

| Error Error initializing classpath: services.gradle.org
java.net.UnknownHostException: services.gradle.org
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:673)
        at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:173)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
        at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
        at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
        at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1564)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
        at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:263)
        at org.gradle.wrapper.Download.downloadInternal(Download.java:58)
        at org.gradle.wrapper.Download.download(Download.java:44)
        at org.gradle.tooling.internal.consumer.DistributionFactory$ProgressReportingDownload.download(DistributionFactory.java:201)
        at org.gradle.wrapper.Install.call(Install.java:61)
        at org.gradle.wrapper.Install.call(Install.java:48)
        at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
        at org.gradle.wrapper.Install.createDist(Install.java:48)
        at org.gradle.tooling.internal.consumer.DistributionFactory$ZippedDistribution.call(DistributionFactory.java:138)
        at org.gradle.tooling.internal.consumer.DistributionFactory$ZippedDistribution.call(DistributionFactory.java:132)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
| Error Error initializing classpath: services.gradle.org

类似地，当我尝试下载一个项目（比如从 start.grails.org 生成的项目）并且只是运行在本地使用 grailsw run-app 时，我得到：

You must be connected to the internet the first time you use the Grails wrapper
java.net.UnknownHostException: repo.grails.org
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at java.net.Socket.connect(Socket.java:538)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
        at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
        at sun.net.www.http.HttpClient.New(HttpClient.java:339)
        at sun.net.www.http.HttpClient.New(HttpClient.java:357)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1564)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
        at java.net.URL.openStream(URL.java:1045)
        at grails.init.Start.getVersion(Start.java:36)
        at grails.init.Start.main(Start.java:83)

即使是简单的帮助命令也不起作用，因为 grails -help 输出 | Error Error occurred running Grails CLI: repo.grails.org

这可能是什么原因？公司防火墙是否阻止了某些东西？我怎样才能完成这项工作？

Answer 1

您提到了公司代理；您可以在 gradle.properties 中这样设置您的代理：

systemProp.https.proxyHost=<your proxy>
systemProp.https.proxyPort=<your port>
systemProp.http.proxyHost=<probably same>
systemProp.http.proxyPort=<probably same>
systemProp.http.nonProxyHosts:<optional.  comma-separated.  probably at least want localhost in there: *.domain.com,localhost>

尽管路径正确，但无法使用 Grails

Can't use Grails despite correct paths

grails

windows-10

grails3

grails-3.3