隐藏控制台的键盘输入代码,Java代码库,德仔网

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【Java】隐藏控制台的键盘输入
作者:Hugh / 发布于2014/1/28/ 437
using System;

namespace RobvanderWoude
{
  class HideInput
  {
    static int Main( string[] args )
    {
      try
      {
        bool clearscreen = false;

        if ( args.Length > 1 )
        {
          return WriteError( "Too many command line arguments" );
        }
        if ( args.Length == 1 )
        {
          switch ( args[0].ToUpper( ) )
          {
            case "/C":
              clearscreen = true;
              break;
            case "/?":
              return WriteError( );
            default:
              return WriteError( "Invalid command line argument \"" + args[0] + "\"" );
          }
        }

        // Set console foreground color to background color to hide what's being typed
        ConsoleColor color = Console.ForegroundColor;
        Console.ForegroundColor = Console.BackgroundColor;

        // Read 1 line of input from the console
        string input = Console.ReadLine( );

        // Restore the original console foreground color
        Console.ForegroundColor = color;

        // Clear the screen id specified on the command line
        if ( clearscreen )
        {
          Console.Clear( );
        }

        // Display the input - which should be redirected for this program to be of any use
        Console.WriteLine( input );

        // Returncode 0 for success, or 1 if the input was empty or whitespace only
        if ( string.IsNullOrWhiteSpace( input ) )
        {
          return 1;
        }
        else
        {
          return 0;
        }
      }
      catch ( Exception e )
      {
        return WriteError( e.Message );
      }
    }

    public static int WriteError( string errorMessage = "" )
    {
      /*
      HideInput, Version 1.00
      Batch utility to read 1 line of input while hiding what's being typed, by
      temporarily setting the console foreground color equal to its background color

      Usage: FOR /F "tokens=*" %%A IN ('HIDEINPUT') DO SET password=%%A
       or: FOR /F "tokens=*" %%A IN ('HIDEINPUT /C') DO SET password=%%A

      Where: /C clears the screen to remove what's typed from the screen buffer

      Written by Rob van der Woude
      http://www.robvanderwoude.com
      */

      Console.ResetColor( );
      if ( string.IsNullOrEmpty( errorMessage ) == false )
      {
        Console.Error.WriteLine( );
        Console.ForegroundColor = ConsoleColor.Red;
        Console.Error.Write( "ERROR: " );
        Console.ForegroundColor = ConsoleColor.White;
        Console.Error.WriteLine( errorMessage );
        Console.ResetColor( );
      }
      Console.Error.WriteLine( );
      Console.Error.WriteLine( "HideInput, Version 1.10" );
      Console.Error.WriteLine( "Batch utility to read 1 line of input while hiding what's being typed, by" );
      Console.Error.WriteLine( "temporarily setting the console foreground color equal to its background color" );
      Console.Error.WriteLine( );
      Console.Error.Write( "Usage: FOR /F \"tokens=*\" %%A IN ('" );
      Console.ForegroundColor = ConsoleColor.White;
      Console.Error.Write( "HIDEINPUT" );
      Console.ResetColor( );
      Console.Error.WriteLine( "') DO SET password=%%A" );
      Console.Error.Write( "  or: FOR /F \"tokens=*\" %%A IN ('" );
      Console.ForegroundColor = ConsoleColor.White;
      Console.Error.Write( "HIDEINPUT /C" );
      Console.ResetColor( );
      Console.Error.WriteLine( "') DO SET password=%%A" );
      Console.Error.WriteLine( );
      Console.Error.Write( "Where: " );
      Console.ForegroundColor = ConsoleColor.White;
      Console.Error.Write( "/C" );
      Console.ResetColor( );
      Console.Error.WriteLine( " clears the screen to remove what's typed from the screen buffer" );
      Console.Error.WriteLine( );
      Console.Error.WriteLine( "Written by Rob van der Woude" );
      Console.Error.WriteLine( "http://www.robvanderwoude.com" );
      return 1;
    }

  }
}
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