java建立縮圖

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上載者:User
public void createSmallPic(int height, int width){  String smallPath = "smallPath"; // 小圖存放目錄     if(!new File(smallPath).exists()) {     new File(smallPath).mkdirs();   }  double ratio = 0.0;  File file = new File("d:/a.jpg"); // 大圖路徑  BufferedImage bi = ImageIO.read(file); // 讀取大圖  if ((bi.getHeight() > height) || (bi.getWidth() > width)) {    if (bi.getHeight() > bi.getWidth()) {       ratio = (new Integer(height)).doubleValue() / bi.getHeight();    } else {      ratio = (new Integer(width)).doubleValue() / bi.getWidth();    }    file = new File(smallPath + File.separator + file.getName() + "_" +                          height + "_" + width + ".jpg"); // 縮圖路徑    Image img = bi.getScaledInstance(width, height, bi.SCALE_SMOOTH);    AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(ratio, ratio), null);    img = op.filter(bi, null);    ImageIO.write((BufferedImage) img, "jpg", file);  }}
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