Download files java

Then, we opened an InputStream from the file using openStream method. Next, in order to be able to download large files we wrapped the input stream into a BufferedInputStream. Also, we created a FileOutputStream by providing a path on the disk where we want the file to be saved. Next, we use a bucket of byte[] to read bytes from the input stream and writing onto the output stream iteratively.

This example, demonstrates how we can use our own buffer for example bytes so that downloading large files should not consume huge memory on our system. To do that, we have used try-with-resources block for respective streams instantiation. While writing the previous example, we had to take care of a lot of logic. Thankfully, Java Files class provides the copy method which handles these logic internally.

The Java NIO package offers a faster way of data transfer, which does not buffer data in memory. Community Bot 1 1 1 silver badge. Frankly I doubt it has anything to do with your file-reading code, and everything to do with either your connection to the server, or the server itself. For me, mostly it depends on your internet speed rather than your code.

Are you sure it's a code issue? It seems to me that your server might be taking too long to accept your connection. If that's the case, it won't matter how good your Java is. Try to find out which line of code is taking up all the time. Aha, ok. Thanks, it has crossed my mind that it might also be the connection speed Have you considered trying the same code with a local file? Or at least one in closer proximity network-wise?

Show 4 more comments. Active Oldest Votes. But of course - it depends on your connections speed Improve this answer. Christian Christian 1 1 gold badge 4 4 silver badges 15 15 bronze badges. Channels; import java. FileChannel; import java. About Clivant Clivant a. Follow us. You may also like:. FileOutputStream java. HttpURLConnection java. URL java. Finally, we get the file from the online source using the transferFrom method.

This method transfers the data from source to a FileChannel that writes into the fos. The next best way to download a file from an online source is to use the FileUtils. Below, we create a URL object with the link to the online file resource. Next, we create a local file where the downloaded file can reside. Just like the first example, we use the java. In the code, we have a URL object fetchWebsite that points to the source of the file. We create an object of Path that tells the target where we want the file to be copied.