java打印屏幕两个监视器

Question

我试图使用打印屏幕图像区域来获得两个显示器，但只适用于一个显示器。你能告诉我如何获得图2显示器吗？

        Robot robot = new Robot();    
        Rectangle screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
        BufferedImage capture = new Robot().createScreenCapture(screenRect);
        ImageIO.write(capture, "bmp", new File("printscreen.bmp"));

Answer 1

将每个屏幕的边界合并在一起：

Rectangle screenRect = new Rectangle(0, 0, 0, 0);
for (GraphicsDevice gd : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()) {
    screenRect = screenRect.union(gd.getDefaultConfiguration().getBounds());
}
BufferedImage capture = new Robot().createScreenCapture(screenRect);

Answer 2

您可以尝试：

int width = 0;
int height = 0;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gs = ge.getScreenDevices();
for (GraphicsDevice curGs : gs)
{
  DisplayMode mode = curGs.getDisplayMode();
  width += mode.getWidth();
  height = mode.getHeight();
}

这应该计算多个屏幕的总宽度。显然，它只支持上面形式的水平对齐屏幕——你必须分析图形配置的边界来处理其他监视器对齐（取决于你想让它变得多么防弹）。

如果您的主监视器在右侧，并且您希望即使在左侧也能获得图像，请使用此：

Rectangle screenRect = new Rectangle(-(width / 2), 0, width, height);
BufferedImage capture = new Robot().createScreenCapture(screenRect);
ImageIO.write(capture, "bmp", new File("printscreen.bmp"));

Answer 3

这是我使用和测试过的代码，它很有效，它在res文件夹中创建了两个png文件（将其更改为您的文件夹），一个用于我的主屏幕，另一个用于辅助屏幕。我还打印了关于显示器的边界信息，如果你想在一个图像中显示两个显示器，只需添加两个显示器的宽度，你就会得到

public static void screenMultipleMonitors() {
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] gDevs = ge.getScreenDevices();
    for (GraphicsDevice gDev : gDevs) {
        DisplayMode mode = gDev.getDisplayMode();
        Rectangle bounds = gDev.getDefaultConfiguration().getBounds();
        System.out.println(gDev.getIDstring());
        System.out.println("Min : (" + bounds.getMinX() + "," + bounds.getMinY() + ") ;Max : (" + bounds.getMaxX()
                + "," + bounds.getMaxY() + ")");
        System.out.println("Width : " + mode.getWidth() + " ; Height :" + mode.getHeight());
        try {
            Robot robot = new Robot();
            BufferedImage image = robot.createScreenCapture(new Rectangle((int) bounds.getMinX(),
                    (int) bounds.getMinY(), (int) bounds.getWidth(), (int) bounds.getHeight()));
            ImageIO.write(image, "png",
                    new File("src/res/screen_" + gDev.getIDstring().replace("\", "") + ".png"));
        } catch (AWTException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}