java实现截取全屏并复制到剪切板功能数显

以下是 Java 实现截取全屏并复制到剪切板的示例代码：

import java.awt.AWTException;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.image.BufferedImage;
import java.io.IOException;

import javax.imageio.ImageIO;

public class ScreenCapture {
    
    public static void main(String[] args) {
        try {
            // 创建 Robot 对象
            Robot robot = new Robot();
            
            // 获取屏幕大小
            Rectangle screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
            
            // 截取全屏幕
            BufferedImage image = robot.createScreenCapture(screenRect);
            
            // 复制到剪切板
            Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
            ImageSelection selection = new ImageSelection(image);
            clipboard.setContents(selection, null);
            
            // 从剪切板获取内容
            Transferable transferable = clipboard.getContents(null);
            if (transferable != null && transferable.isDataFlavorSupported(DataFlavor.stringFlavor)) {
                String text = (String) transferable.getTransferData(DataFlavor.stringFlavor);
                System.out.println(text);
            }
            
        } catch (AWTException | IOException ex) {
            ex.printStackTrace();
        }
    }
    
    // 自定义 Transferable 类，实现复制 BufferedImage 到剪切板
    private static class ImageSelection implements Transferable {
        
        private final BufferedImage image;
        
        public ImageSelection(BufferedImage image) {
            this.image = image;
        }

        @Override
        public DataFlavor[] getTransferDataFlavors() {
            return new DataFlavor[] {DataFlavor.imageFlavor};
        }

        @Override
        public boolean isDataFlavorSupported(DataFlavor flavor) {
            return flavor.equals(DataFlavor.imageFlavor);
        }

        @Override
        public Object getTransferData(DataFlavor flavor) throws IOException {
            if (flavor.equals(DataFlavor.imageFlavor)) {
                return image;
            } else {
                throw new IOException("Unsupported data flavor: " + flavor.getHumanPresentableName());
            }
        }
        
    }
}

代码中使用 `Robot` 类实现截取全屏，使用 `Clipboard` 类实现复制到剪切板。需要注意的是，复制到剪切板的内容必须实现 `Transferable` 接口，因此需要自定义一个 `ImageSelection` 类来实现复制 `BufferedImage` 到剪切板。