我正在尝试将图片大小调整为50 * 50像素。我从他们存储在数据库中的路径中获取图像。我没有问题获取图像并显示它们。我只是想知道我应该在什么时候尝试调整图像大小。应该是将图像作为缓冲图像,还是只是尝试调整图标大小?
while (rs.next()) {
i = 1;
imagePath = rs.getString("path");
System.out.println(imagePath + "\n");
System.out.println("TESTING - READING IMAGE");
System.out.println(i);
myImages[i] = ImageIO.read(new File(imagePath));
**resize(myImages[i]);**
imglab[i] = new JLabel(new ImageIcon(myImages[i]));
System.out.println(i);
imgPanel[i]= new JPanel();
imgPanel[i].add(imglab[i]);
loadcard.add(imgPanel[i], ""+i);
i++;
上面的代码检索图像并将其分配给ImageIcon,然后分配给JLabel。我试图通过使用下面的调整大小方法来调整缓冲图像的大小。你们能不清楚为什么这对我不起作用?没有任何错误,只是图像保持原始大小。
public static BufferedImage resize(BufferedImage img) {
int w = img.getWidth();
int h = img.getHeight();
int newH = 50;
int newW = 50;
BufferedImage dimg = dimg = new BufferedImage(newW, newH, img.getType());
Graphics2D g = dimg.createGraphics();
System.out.println("Is this getting here at all " + dimg);
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(img, 0, 0, newW, newH, 0, 0, w, h, null);
g.dispose();
return dimg;
}
答案 0 :(得分:5)
您在每个图像上调用resize(),但不替换数组中的图像。所以resize()的输出被抛弃了:
myImages[i] = ImageIO.read(new File(imagePath)); // create an image
resize(myImages[i]); // returns resized img, but doesn't assign it to anything
imglab[i] = new JLabel(new ImageIcon(myImages[i])); // uses _original_ img
您需要将中间行更改为:
myImages[i] = resize(myImages[i]);
使这项工作。