在cmd窗口(需要以管理员身份运行)，

cd %JAVA_HOME% 

只有在设置了系统环境变量JAVA_HOME后才有效。要为路径设置系统变量，可以这样做

setx %JAVA_HOME% C:\Java\jdk1.8.0_121\

然后你就可以打字了

cd c:\Java\jdk1.8.0_121\bin

or

cd %JAVA_HOME%\bin

然后，执行JAVA jdk提供的任何命令，例如

keytool -genkey -v -keystore myapp.keystore -alias myapp

你只需要按回车键后回答问题(相当于在cmd行上输入值)!密钥将被生成

在我的例子中，我已经使用ionic cordova build android——prod命令生成了一个APK文件，我需要为已经存在的APK文件获取SHA-1指纹。下面是我如何通过在App目录中运行以下命令来获得它:

Keytool -list -printcert -jarfile app-debug.apk

所以，我基本上在以下应用程序位置运行上述命令:

C:\myApp\platforms\android\app\build\outputs\apk\debug>keytool -list -printcert -jarfile app-debug.apk

这给了我SHA1指纹为:7B:6B:AD:…

希望这能帮助到一些人!

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。

KEYTOOL在JAVAC SDK中，所以你必须在包含jns JAVAC的目录中找到它

KeyTool是JDK的一部分。假设您使用默认设置安装了JDK，您将在$JAVA_HOME/bin中找到它

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