这取决于您的Eclipse版本(我使用的是Kepler)。 去Windows>首选项>Android>构建。

您将找到调试密钥库的位置路径以及SHA1指纹(您可以复制并使用它)

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，它应该是$JAVA_HOME/bin/keytool

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。

你也可以这样做:

将bat文件复制到PATH环境变量中已经存在的任何文件夹中 然后只需在任何Windows shell中使用keytool命令

keytool的实际位置在bat文件中定义。如果位置错误，bat文件将扫描您的系统，以检测ProgramFiles(子)文件夹中的潜在位置。

还可以找到keytool2.bat，这是"keytool -v -list -keystore"的便捷快捷方式，广泛用于快速检查jks文件的内容。

keytool.bat:

:: 
:: 
:: "keytool alias" script by Céphas
:: easy method : add the known keytool.exe folder to your personal PATH variable (run : C:\Windows\System32\rundll32.exe sysdm.cpl,EditEnvironmentVariables)
:: else, add the folder containing this bat script to your personal path or put this script in any folder already defined in your path
::
:: also see keytool2.bat that automatically adds the following parameters in the keytool command line : -v -list -keystore, for quick display of jks content
:: 
:: 
@echo off
set THIS_SCRIPT=%~f0
rem  setlocal enableDelayedExpansion : necessary for paths containing special chars
setlocal enableDelayedExpansion

rem  set PATH to keytool.exe ; path must include the final \
rem  ^ is escape char for paths containing & \ < > ^ | 
set PATH_TO=C:\Program Files\Java\jre1.8.0_45\bin\
set PROG_NAME=keytool.exe

rem full_path, with "", to work with paths containing special chars
set FULL_KT_PATH="!PATH_TO!!PROG_NAME!"

rem checks if keytool.exe exists
(dir %FULL_KT_PATH%>nul 2>nul && set KT_FOUND=yes) || set KT_FOUND=no

if %KT_FOUND%==yes (
    rem keytool found => launching it with all supplied parameters
    rem 
    rem
    %FULL_KT_PATH% %*
    rem
    rem
) else (
    rem keytool not found, trying to find it in %ProgramFiles%

    echo.
    echo Keytool not found in expected location, scan in progess ...
    echo.

    cd "%ProgramFiles(x86)%" 2>nul && dir /B /S keytool.exe 2>nul

    cd "%ProgramFiles%" 2>nul && dir /B /S keytool.exe 2>nul

    echo.
    echo *********
    echo Path to program keytool.exe not properly defined, or keytool/java missing on this system
    echo If any location has been found during above scan, fix variable "PATH_TO" in %THIS_SCRIPT% accordingly
    echo *********
    echo.
    pause
    
)    

keytool2.bat:

:: 
:: 
:: "keytool2 alias" script by Céphas
:: easy method : add the known keytool.exe folder to your personal PATH variable (run : C:\Windows\System32\rundll32.exe sysdm.cpl,EditEnvironmentVariables)
:: else, add the folder containing this bat script to your personal path or put this script in any folder already defined in your path
::
:: keytool2 automatically adds the following parameters in the keytool command line : -v -list -keystore
:: thus, to quickly display the full content of a jks file, usage is simply : keytool2 \path\to\your\keystore.jks [-alias your_alias]
:: 
:: 
@echo off
set THIS_SCRIPT=%~f0
rem  setlocal enableDelayedExpansion : necessary for paths containing special chars
setlocal enableDelayedExpansion

rem  set PATH to keytool.exe ; path must include the final \
rem  ^ is escape char for paths containing & \ < > ^ | 
set PATH_TO=C:\Program Files\Java\jre1.8.0_45\bin\
set PROG_NAME=keytool.exe


rem full_path, with "", to work with paths containing special chars
set FULL_KT_PATH="!PATH_TO!!PROG_NAME!"

rem checks if keytool.exe exists
(dir %FULL_KT_PATH%>nul 2>nul && set KT_FOUND=yes) || set KT_FOUND=no

if %KT_FOUND%==yes (
    rem keytool found => launching it with all supplied parameters
    rem 
    rem
    %FULL_KT_PATH% -v -list -keystore %*
    rem
    rem
) else (
    rem keytool not found, trying to find it in %ProgramFiles%

    echo.
    echo Keytool not found in expected location, scan in progess ...
    echo.

    cd "%ProgramFiles(x86)%" 2>nul && dir /B /S keytool.exe 2>nul

    cd "%ProgramFiles%" 2>nul && dir /B /S keytool.exe 2>nul

    echo.
    echo *********
    echo Path to program keytool.exe not properly defined, or keytool/java missing on this system
    echo If any location has been found during above scan, fix variable "PATH_TO" in %THIS_SCRIPT% accordingly
    echo *********
    echo.
    pause
    
)