Swing 将显示好的JPanel保存为一张图片

在JFrame中添加如下代码

//自己的JPanel

DrawPanel drawPanel = new DrawPanel(list, width, height, start, end);

// 必须要有大小

drawPanel.setSize(width, height);

BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

Graphics2D g2 = image.createGraphics();

drawPanel.paint(g2);

try {

ImageIO.write(image, "jpeg", new File("jpanel.jpg"));

} catch (IOException e) {

e.printStackTrace();

}

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