Error Error initializing classpath: Connection timed out: connect (Use --stacktrace to see the full

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参考文章：http://cache.baiducontent.com/c?m=9d78d513d99007b8589cc93e5801d6160e54f7743da785552c82cd1f84652b564711f4ba5767505791872b2716ae394bea87217347557df2c796d5198bac935838885023716cd01c578f47f2981032c050cb06aff859bbe9ae2593df848e9a080d9700536d81809c5a7703cb1fa84775b0b19838025e63adec4062f54d3069c12c1af001bbf7331d1a9cb79b0f1d9a77943651c3f168f52912c242f940066703f70df7530c7a71fd4f2cf5413b0396ed40bc77251b72a148c5e986edb51e9bdc9c62c4ac8bf274c377e6b3bdb9311f3045fa53fbf1eaee2a643354848f82489961eaedeccc19a947814e0b&p=92759a46d6c606dd0be2963649478c&newp=9f3fce16d9c11fb51fbd9b7d0d138c231610db2151d4d54b6593&user=baidu&fm=sc&query=at+org%2Egradle%2Ewrapper%2EDownload%2EdownloadInternal%28Download%2Ejava%3A58%29&qid=f93737f60005c1cc&p1=2

http://stackoverflow.com/questions/29874564/ionic-build-android-error-when-download-gradle

今天在grails工程目录下面运行命令grails run-app出现如下错误：

D:\Projects\Grails\project\HelloWorld>grails -stacktrace
Java HotSpot(TM) Client VM warning: TieredCompilation is disabled in this releas
e.
| Error Error initializing classpath: Connection timed out: connect (NOTE: Stack
trace has been filtered. Use --verbose to see entire trace.)
java.net.ConnectException: Connection timed out: connect
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$ProgressRepo
rtingDownload.download(DistributionFactory.java:177)
at org.gradle.wrapper.Install$1.call(Install.java:62)
at org.gradle.wrapper.Install$1.call(Install.java:48)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAcc
essManager.java:65)
at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.tooling.internal.consumer.DistributionFactory$ZippedDistri
bution$1.call(DistributionFactory.java:122)
at org.gradle.tooling.internal.consumer.DistributionFactory$ZippedDistri
bution$1.call(DistributionFactory.java:116)
| Error Error initializing classpath: Connection timed out: connect

先看下老外解决改问题的原文内容：

I am using Ionic version 1.7.14 and the distributionUrl found in the following file. myApp/platforms/android/cordova/lib/builders/GradleBuilder.js.

I had to point the locally downloaded gradle as specified in this answer.

I had the same problem. I added gradle to my project offline.

After downloading gradle from issued link (here is http://services.gradle.org/distributions/gradle-2.2.1-all.zip) paste it in somewhere likes myApp\platforms\android\gradle\gradle-2.2.1-all.zip and in build.js from myApp\platforms\android\cordova\lib\build.js find this:

var distributionUrl = 'distributionUrl=http\\://services.gradle.org/distributions/gradle-2.2.1-all.zip';
And replace it with your own file's location:

var distributionUrl = 'distributionUrl=../gradle-2.2.1-all.zip';

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看错误信息，很明显是因为下载gradle超时引起的(我这里的网络不是很好哈)

解决方法：

1、手动下载自己需要的gradle版本，如我需要的是： gradle-2.9-bin.zip

官方各个版本下载地址：https://services.gradle.org/distributions/ // 貌似下载很慢或下载不了哈。。。

2. 打开文件gradle-wrapper.properties，如我的grails工程中该文件所在位置是：工程根目录\gradle\wrapper\gradle-wrapper.properties

3. 用#号注释掉原先的distributionUrl，然后再写一行，将其值改成我们下载的gradle的包所在路径即可

#distributionUrl=https\://services.gradle.org/distributions/gradle-2.9-bin.zip
distributionUrl=./gradle-2.9-bin.zip

如我的设置截图如下：

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