如何用VS Code在Windows部署Flutter应用？找不到keytool求指导

Hey there! I’ve dealt with this exact headache before when getting ready to deploy a Flutter app, so let’s break down how to get keytool working for you:

1. Check if JDK is installed (and keytool exists) #

First, open your terminal/command prompt and run:

keytool -version

If you get an error saying the command isn’t found, that means either:

• You don’t have a JDK installed, or
• The JDK’s bin directory isn’t added to your system’s PATH.

2. Install a JDK (if you haven’t already) #

keytool comes bundled with the Java Development Kit (JDK). I recommend using OpenJDK (it’s free and widely supported):

• For Windows/macOS/Linux, you can grab it via your system’s package manager (like sudo apt install openjdk-11-jdk on Ubuntu) or a trusted open-source distributor.
• After installation, locate the bin folder in your JDK directory (e.g., C:\Program Files\Java\jdk-11.0.18\bin on Windows, /usr/lib/jvm/java-11-openjdk-amd64/bin on Linux).

3. Add keytool to your system PATH #

Once you have the JDK’s bin path:

• Windows: Open System Properties → Advanced → Environment Variables. Find the Path variable, click Edit, and add the full path to the JDK’s bin folder.
• macOS/Linux: Open your shell config file (.bashrc, .zshrc, etc.) and add this line:

  export PATH="$PATH:/path/to/your/jdk/bin"
  

  Save the file, then run source ~/.zshrc (or your corresponding config file) to apply changes immediately.

4. Use Android Studio’s embedded JDK (if you have Studio installed) #

If you already use Android Studio, it includes its own embedded JDK with keytool. Here’s where to find it:

• Windows: C:\Program Files\Android\Android Studio\jbr\bin\keytool.exe
• macOS: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/keytool
• Linux: /opt/android-studio/jbr/bin/keytool

You can either add this path to your system’s PATH, or tell Flutter exactly where to find it with:

flutter config --android-keytool "/full/path/to/keytool"

5. Verify it works #

After making these changes, restart your terminal and VS Code, then run keytool -version again. If it shows the version info, you’re good to go—try your Flutter deployment command once more!

内容的提问来源于stack exchange，提问作者SaySomething