java获取图片原始尺寸

java获取图片原始尺寸

URL url = null;
InputStream is = null;
BufferedImage img = null;

try {
 url = new URL(picurl);
 is = url.openStream();
 img = ImageIO.read(is);
} catch (MalformedURLException e) {
 e.printStackTrace();
} catch (IOException e) {
 e.printStackTrace();
} finally {  

 try {
     is.close();
 } catch (IOException e) {
     e.printStackTrace();
 }
}  

//System.out.println(img.getHeight()+"/"+img.getWidth());

String str = "{\"width\":\""+img.getWidth()+"\",\"height\":\""+img.getHeight()+"\"}";
out.print(str);