隐藏命令行输入 [英] Hide input on command line

问题描述

我知道像 Git 等命令行界面能够隐藏用户的输入(对密码很有用).有没有办法在 Java 中以编程方式执行此操作?我正在从用户那里输入密码，我希望他们的输入在该特定行上隐藏"(但不是全部).这是我的代码(虽然我怀疑它会有所帮助......)

I know that command line interfaces like Git and others are able to hide input from a user (useful for passwords). Is there a way to programmtically do this in Java? I'm taking password input from a user and I would like their input to be "hidden" on that particular line (but not on all of them). Here's my code for it (though I doubt it would be helpful...)

try (Scanner input = new Scanner(System.in)) {
  //I'm guessing it'd probably be some property you set on the scanner or System.in right here...
  System.out.print("Please input the password for " + name + ": ");
  password = input.nextLine();
}

推荐答案

尝试 java.io.Console.readPassword.不过，您必须至少运行 Java 6.

Try java.io.Console.readPassword. You'll have to be running at least Java 6 though.

   /**
    * Reads a password or passphrase from the console with echoing disabled
    *
    * @throws IOError
    *         If an I/O error occurs.
    *
    * @return  A character array containing the password or passphrase read
    *          from the console, not including any line-termination characters,
    *          or <tt>null</tt> if an end of stream has been reached.
    */
    public char[] readPassword() {
        return readPassword("");
    }

但请注意，这 不适用于 Eclipse 控制台.您必须从 true 控制台/shell/终端/提示中运行该程序才能对其进行测试.

Beware though, this doesn't work with the Eclipse console. You'll have to run the program from a true console/shell/terminal/prompt to be able to test it.

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