I need to create a File object from URL object My requirement is I need to create a file object of a web image (say googles logo)
URL url = new URL("http://google.com/pathtoaimage.jpg");
File f = create image from url object
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Could you elaborate? What are you trying to achieve?MByD– MByD2011-11-30 11:14:25 +00:00Commented Nov 30, 2011 at 11:14
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I would also recommend looking at this question and check if it does the job for youMByD– MByD2011-11-30 11:15:54 +00:00Commented Nov 30, 2011 at 11:15
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5 Answers
Use Apache Common IO's FileUtils:
import org.apache.commons.io.FileUtils
FileUtils.copyURLToFile(url, f);
The method downloads the content of url and saves it to f.
5 Comments
Adri w Ukraine
This worked for me:
URL url = new URL("http://www.mydomain.com/pathToFile/fileName.pdf"); String tDir = System.getProperty("java.io.tmpdir"); String path = tDir + "tmp" + ".pdf"; file = new File(path); file.deleteOnExit(); FileUtils.copyURLToFile(url, file);
Galen Nare
@AdrienBe
FileUtils gets an error in Eclipse, it doesn't show an import.Adri w Ukraine
import org.apache.commons.io.FileUtils should do the job, see link to library in answer
Kenston Choi
And
org.apache.commons.io.FileUtils.toFile(URL url) in case we just want to convert URL to File.
Saeed
Note: add
implementation 'commons-io:commons-io:2.6' to gradle dependencies blockSince Java 7
File file = Paths.get(url.toURI()).toFile();
3 Comments
User9123
This is for retrieving the file location, with the
file:// protocol for exemple, not sure if the OP wanted the location or download the image itself, but anyways this is what I was looking for personally. thanks
Jack J
This causes a URISyntaxException if the URL has any spaces in it as might likely be the case if the URL uses a
file:// protocol.
Asu
Spaces should be replaced by:
%20You can make use of ImageIO in order to load the image from an URL and then write it to a file. Something like this:
URL url = new URL("http://google.com/pathtoaimage.jpg");
BufferedImage img = ImageIO.read(url);
File file = new File("downloaded.jpg");
ImageIO.write(img, "jpg", file);
This also allows you to convert the image to some other format if needed.
5 Comments
nidhin
Is their any way to create file object from BufferedImage with out writing it to disk
Costi Ciudatu
A file by definition needs to be stored on some file system. You would need some in-memory file system in order to end up with a file that is not persisted.
Costi Ciudatu
My feeling is that your requirement needs some second thought... Namely, assuming you need to call a method like
processImage(File f), this should be changed to processImage(BufferedImage img) or processImage(InputStream is). Either of these changes would spare you of storing external images on the local FS.Costi Ciudatu
Regarding the accepted answer,
FileUtils needs a File instance (as you may have noticed), the same as the ImageIO API does. If you'll choose to create a temporary file, that will still be persisted, but deleted on JVM exit (and/or created in the system tmp directory). So from this point of view, the two answers are exactly the same. :P
Jose Mhlanga
this saved my day after more than 4 hrs of debugging. Thanks
You can convert the URL to a String and use it to create a new File. e.g.
URL url = new URL("http://google.com/pathtoaimage.jpg");
File f = new File(url.getFile());
4 Comments
Asu
When using this method for local file system files that have a space in the full path, %20 will not get converted to space automatically and may cause an exception
Zweibieren
url.getFile attaches the query (say, ?a=b&c=d), if any. Usually moot since there is usually no query. However, to get just the file, one should use url.getPath()
Zweibieren
Neither getFile or getPath does proper decoding, so the Paths.get() approach just above is preferable,
Jan Nielsen
@byxor -- since you've corrected your mistake, is there any value in keeping your two comments? If not, remove. I'll remove my comment when you do.
In order to create a File from a HTTP URL you need to download the contents from that URL:
URL url = new URL("http://www.google.ro/logos/2011/twain11-hp-bg.jpg");
URLConnection connection = url.openConnection();
InputStream in = connection.getInputStream();
FileOutputStream fos = new FileOutputStream(new File("downloaded.jpg"));
byte[] buf = new byte[512];
while (true) {
int len = in.read(buf);
if (len == -1) {
break;
}
fos.write(buf, 0, len);
}
in.close();
fos.flush();
fos.close();
The downloaded file will be found at the root of your project: {project}/downloaded.jpg
