/**
* change image's width and height
*
* @param origin
* source image's path
* @param dest
* target image's path
* @param width
* expected width
* @param height
* expected height
* @return true:success || false:failed
*/
public static boolean resizeImg(String origin, String dest, int width, int height) {
try {
BufferedImage img = ImageIO.read(new File(origin));
// origin width and height
int imgWidth = img.getWidth();
int imgHeight = img.getHeight();
// check width and height
if (imgWidth > width || imgHeight > height) {
float widthRate = (float)imgWidth / (float)width;
float heightRate = (float)imgHeight / (float)height;
float rate = widthRate > heightRate ? widthRate : heightRate;
rewriteImg(origin, dest, 0, 0, (int)(imgWidth / rate), (int)(imgHeight / rate), BufferedImage.TYPE_INT_RGB);
}
return true;
} catch (Exception e) {
return false;
}
}
public static boolean rewriteImg(String origin, String dest, int x, int y,
int width, int height, Integer scaleType) {
try {
// img's suffix
String suffix = origin.substring(origin.lastIndexOf(".") + 1);
// source image
Image image = ImageIO.read(new File(origin));
// get target
BufferedImage tag = new BufferedImage(width, height, scaleType);
Graphics g = tag.getGraphics();
g.drawImage(image, x, y, width, height, null);
g.dispose();
// Graphics to ByteArrayOutputStream
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ImageIO.write(tag, suffix, bos);
// write file
FileOutputStream fos = new FileOutputStream(dest);
fos.write(bos.toByteArray());
fos.flush();
fos.close();
return true;
} catch (Exception e) {
return false;
}
}
