public File downloadImageAndResize(int thumbnailSize) {
if (this.type != Type.image) {
log.warn("Cannot download non-images!");
return null;
}
HttpGet get = null;
HttpResponse getResponse = null;
try {
File f = File.createTempFile(this.getClass().getSimpleName() + "-", ".image");
get = new HttpGet(imageUrl);
getResponse = httpClient.execute(get);
getResponse.getEntity().writeTo(new FileOutputStream(f));
BufferedImage org = ImageIO.read(f);
ResampleOp resampleOp = new ResampleOp(thumbnailSize, thumbnailSize);
BufferedImage scaled = resampleOp.filter(org, null);
File imageFile = File.createTempFile(this.getClass().getSimpleName() + "-", ".png");
ImageIO.write(scaled, "png", imageFile);
f.delete();
return imageFile;
} catch (Exception e) {
log.warn(this + ": Unable to download file", e);
hadErrors = true;
if (get != null) {
get.abort();
}
if (getResponse != null) {
try {
EntityUtils.consume(getResponse.getEntity());
} catch (IOException e1) {
log.debug("Failed to clean up", e1);
}
}
}
return null;
}
private void width(String path, Integer imgWidth) {
try {
BufferedImage imageResize = ImageIO.read(new File(path));
int width = imageResize.getWidth();
int height = imageResize.getHeight();
float ratio = (float) width / (float) height;
if (width > imgWidth) {
width = imgWidth;
height = (int) (imgWidth / ratio);
}
ResampleOp reOp = new ResampleOp(width, height);
BufferedImage newImg = reOp.filter(imageResize, null);
File file = new File(path);
String parentPath = file.getParent();
String name = file.getName();
// 判断整数
if (name.substring(0, name.indexOf(".")).matches("[\\d]+")) {
ImageIO.write(newImg, "JPEG", new File(parentPath + "/" + imgWidth + "_" + name));
}
} catch (Exception e) {
e.printStackTrace();
}
}