启动gradle 1.1时获得了以下stacktrace，任何人都知道如何解决它们：
Exception in thread "main" java.lang.NullPointerException
at org.gradle.wrapper.BootstrapMainStarter.findLauncherJar(BootstrapMainStarter.java:37)
at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:28)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:130)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:47)
我认为dists / gradle-1.1-bin / 13d7lnhcrghv2i5e54el41jpgr / gradle-1.1-bin.zip的自动解压缩可能会失败。我检查了权限，并且可以访问该目录。
如果手动解压缩，则会出现以下错误：
Exception in thread "main" java.lang.RuntimeException: Gradle distribution 'http://services.gradle.org/distributions/gradle-1.1-bin.zip' contains too many directories. Expected to find exactly 1 directory.
at org.gradle.wrapper.Install.createDist(Install.java:73)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:129)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:47)
我在Google上搜索了gradle nullpointerexception，它提到需要设置JAVA_HOME进行编译，但是我已经检查了它的设置是否正确，并且能够在该环境中使用ant进行编译。