无法从 Appengine 下载代码 - Java

Question

以下是我尝试执行以从 AppEngine 下载源代码的代码：

/Users/sridhar/Desktop/backupdata/appengine-java-sdk-1.7.4/bin/appcfg.sh download_app -A maharasims2 -V 23 download_app .

我收到错误格式错误：

Bad argument: Expected download directory as an argument after download_app.
AppCfg [options] -A app_id [ -V version ] download_app <out-dir>

Download a previously-uploaded app to the specified directory.  The app
ID is specified by the "-A" option.  The optional version is specified
by the "-V" option.

谁能帮帮我？

---

我尝试了以下方法并且成功了。

第一步： jdk/bin/appcfg.sh -A -V download_app

示例：

/Users/Desktop/appengine-java-sdk-1.7.4/bin/appcfg.sh -A testapp -V 23 download_app ~/Desktop/backupdata/downloads/

第 2 步： http://architecturalatrocities.com/post/19073788679/fixing-the-trustanchors-problem-when-running-openjdk-7

注意： 如果遇到以下错误，请使用第 2 步：

“java.security.InvalidAlgorithmParameterException: trustAnchors 参数必须非空”

Answer 1

选项应该在命令之前：

appcfg.sh -A maharasims2 -V 23 download_app .