Question

考虑代码：

    Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard();
    DataFlavor[] flavors = cb.getAvailableDataFlavors();
    flavors = cb.getAvailableDataFlavors();
    for (DataFlavor flavor : flavors) {
        System.out.println(flavor);
    }
    BufferedImage buff = //  flavors  <- I don't know what to put here to make it working; 
    File file = new File("newimage.png");
    ImageIO.write(buff,"png", file);

返回：

 java.awt.datatransfer.DataFlavor[mimetype=image/x-java-image;representationclass=java.awt.Image]

如何设置BufferedImage行以将其保存为图片，（比方说png文件）？

感谢您的帮助！

Answer 1

try {

    Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard();
    BufferedImage img = (BufferedImage)cb.getData(DataFlavor.imageFlavor);
    File file = new File("newimage.png");
    ImageIO.write(img, "png", file);

} catch (Exception e) { throw new RuntimeException(e); }

Answer 2

你试过

吗？

Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
int n=0
for (DataFlavor flavor : flavors) {
BufferedImage image = (BufferedImage)clipboard.getData(flavor);
File file = new File("image"+ n+".png");
ImageIO.write(image , "png", file);
n++;
}

Answer 3

代码

import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import javax.swing.*;

import javax.imageio.ImageIO;
import java.io.File;

public class SaveClipboardScreenshot {

    public static void main(String[] args) throws Exception {
        // get the screenshot
        Robot robot = new Robot();
        robot.keyPress(KeyEvent.VK_PRINTSCREEN);
        robot.delay(40);
        robot.keyRelease(KeyEvent.VK_PRINTSCREEN);
        robot.delay(404);

        Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard();
        DataFlavor[] flavors = cb.getAvailableDataFlavors();
        System.out.println("After: ");
        for (DataFlavor flavor : flavors) {
            System.out.println(flavor);
            if (flavor.toString().indexOf("java.awt.Image")>0) {
                Object o = cb.getData(flavor);
                Image i = (Image)o;
                // ImageIO will not write an Image
                // It will write a BufferedImage (a type of RenderedImage)
                BufferedImage bi = new BufferedImage(
                        i.getWidth(null),
                        i.getHeight(null),
                        BufferedImage.TYPE_INT_RGB);
                Graphics2D g = bi.createGraphics();
                g.drawImage(i, 0, 0, null);
                g.dispose();

                JScrollPane sp = new JScrollPane(new JLabel(new ImageIcon(bi)));
                sp.setPreferredSize(new Dimension(800,600));
                JOptionPane.showMessageDialog(null, sp);
                File f = new File(
                        System.getProperty("user.home") + 
                        File.separator + 
                        "the.png");
                ImageIO.write(bi, "png", f);
            }
        }
    }
}

更新

如何将代码用于静态函数？

在Java中，它们被称为方法，每个main 都是静态。

退回文件。

更改

public static void main(String[] args) throws Exception {

......类似......

public static File getScreenshot() throws Exception {

..也改变..

ImageIO.write(bi, "png", f);

.. ..到

ImageIO.write(bi, "png", f);
return f;

如何在Java中将DataFlavor []保存为图像文件？

3 个答案:

代码

更新