考虑添加PATH作为环境变量，并通过cmd访问它。

PATH作为值，C:\Program Files\Java\ jre1.8.0_331\bin作为变量，并通过keytool访问它…

Keytool是Java SDK的一部分。你应该能够在你的Java SDK目录中找到它，例如C:\Program Files\Java\ jdk1.6.0_14\bin

Few observations while I was getting the same problem (Windows). 1. Shell pipe is important. 2. If you are using OpenSSL or Cygwin, definitely you have to install it. 3. keytool comes with JDK so either you have to point to it in the command or you have cd to the JDK/bin folder (where the exe resides) 4. The debug keystore is typically located at ~/.android/debug.keystore 5. password is "android" whether you -keypass it or type it when prompted. 6. For the alias name, you can open (DO NOT SAVE, just open and close) the keystore file with any editor and read it. 7. MOST IMPORTANT - There is a difference is specifying the keystore path within quotes and without. I got it working by using the keystore path within the double quotes. As remix090378 said and as per the instruction, this command indeed worked - cd C:\Program Files\Java\jdk1.7.0_09\bin

keytool -exportcert -alias androiddebugkey -keystore "C:\Users\userName.android\debug. keystore "密钥存储库" -list -v

如果你安装了带有Xamarin/移动开发支持的visual studio，你将在这里安装java C:\Program Files\Android\jdk\ microsoft_dist_openjdk_{version}\bin\，就像我的情况一样。

keytool位于JDK的bin目录下($JAVA_HOME/bin)。JAVA_HOME是JDK安装目录。 要使用该命令行，还应该在PATH环境变量中包含$JAVA_HOME/bin。

假设您已经在系统中安装了Java，最好是JDK(因为您在问题中提到了它，所以适用于Windows)，您应该在安装的bin文件夹中有keytool实用程序。

如果是这种情况，接下来要做的就是将该bin文件夹添加到Windows安装的PATH环境变量中。

下次你将打开一个Windows shell，你将键入keytool，你将能够运行实际的实用程序。