怎么样用applet实现把页面上的图形保存为一个图片

Question

BufferedImage buf = new BufferedImage(500,//this.getContentPane().getPreferredSize().width,
                                              500,//this.getContentPane().getPreferredSize().height,
                                              BufferedImage.TYPE_INT_RGB);
        Graphics gc = buf.createGraphics();
        this.paint(gc);
        try {
            java.io.FileOutputStream out = new java.io.FileOutputStream("C:\\applet.jpeg");
            javax.imageio.ImageIO.write(buf, "jpeg", out);
        }
        catch (Exception e) {
            e.printStackTrace();
        }

Answer 1

applet 可以直接写磁盘吗？

Answer 2

http://blog.csdn.net/acylas/archive/2004/08/07/67890.aspx

Answer 3

签名问题可参照http://www.dalianit.com/edu/%7B78.85.66.122.78.69.90.62%7D.html，对jar文件进行数字签名操作。