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如何用java编写扫描仪程序

  Q:我想用Java开发一个程序,直接从扫描仪获得扫描数据,然后上载到服务器上,这样的程序需要利用那些知识点(有关Java)?    RE:  javatwain may be a powerful solution,you can go to www.gnome.sk to download the newest package.  JavaTwain version 5.1 is a part of the Morena 6.0 Framework now.    below is an simple example:  /*  * $Id: ExampleShow.java,v 1.5 2002/07/15 13:48:55 mmotovsk Exp $  *  * Copyright (c) 1999-2002 Gnome spol. s r.o. All Rights Reserved.  *  * This software is the confidential and proprietary information of  * Gnome spol. s r.o. You shall not disclose such Confidential  * Information and shall use it only in accordance with the terms  * of the license agreement you entered into with Gnome.  */    // JavaTwain package version 5.1    /**  ExampleShow demonstrates how to scan an image using defaults  from the Twain source.   */  import java.awt.*;  import java.awt.event.*;  import SK.gnome.twain.*;    public class ExampleShow extends Frame  { Image image;  public void paint(Graphics g)  { if (null!=image)  g.drawImage(image, 0, 0, this);  }    WindowListener windowAdapter=new WindowAdapter()  { public void windowClosing(WindowEvent e)  { System.exit(0);  }  };    public ExampleShow()  { try  { addWindowListener(windowAdapter);  setTitle(“ExampleShow Frame Application”);  // Open TWAIN select source dialog box  // and initialize the source selected by the user.  TwainSource source=TwainManager.selectSource(null);  image=Toolkit.getDefaultToolkit().createImage(source);  // wait for the image to be completed  MediaTracker tracker=new MediaTracker(this);  tracker.addImage(image, 0);  // this is the moment the scanner user interface pops up  System.err.println(“Start loading image …”);  try  { tracker.waitForAll();  }  catch (InterruptedException e)  { System.err.println(“Image loading was interrupted!”);  e.printStackTrace();  }  tracker.removeImage(image);  System.err.println(“Image loaded …”);  setSize(image.getWidth(this), image.getHeight(this));  setVisible(true);  TwainManager.close();  }  catch (TwainException e)  { e.printStackTrace();  }  }    public static void main(String[] args)  { new ExampleShow();  }  }  

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