HttpURLConnection httpConn = (HttpURLConnection) url.openConnection()

Public static void downloadFile(String fileURL, String saveDir) * saveDir path of the directory to save the file * fileURL HTTP URL of the file to be downloaded Private static final int BUFFER_SIZE = 4096

* A utility that downloads a file from a URL.

Close the input stream, the output stream and the connection.įor the purpose of reusability, we create a utility class as follows: package.

Repeatedly read array of bytes from the input stream and write them to the output stream, until the input stream is empty.

Create an output stream to save file to disk.

Open the input stream of the opened connection.

Open connection on the URL object – which would return an HttpURLConnection object if the URL is an HTTP URL.

An indirect link which does not contain the real file name, for example:.

A direct link which contains the real file name at the end, for example:.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.In this post, I will guide you how to write Java code to download files from web server programmatically.You know, in Java, we can use the classes URL and HttpURLConnection in the package to programmatically download a file from a given URL by following these steps: Get Learning Mobile App Development: A Hands-on Guide to Building Apps with iOS and Android now with the O’Reilly learning platform. The download will take a couple of minutes depending. Select the version that best matches the machine you will be installing on.ģ. On the page that opens, locate the section titled Java SE Development Kit and accept the license agreement. Open a web browser and navigate to the site Find the area titled Java SE Downloads. However, be sure to select the most recent release that matches your machine. You can use Java from other sources if you want. The first step is to download and install the JDK from Oracle.

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