Effortless File Download in Java and Groovy with Smart Filename Handling
This article presents practical Java and Groovy code snippets for downloading images from URLs, explains a concise Groovy one‑liner, and introduces a helper method that cleans and extracts filenames, illustrating Groovy tuple usage for storing URL‑name pairs.
Java File Download
Provides a static method down(String url, String name) that creates the target file if it does not exist, opens an InputStream from the URL, and writes the data to the file using a 1 KB buffer, with basic logging for success and failure.
Groovy File Download
Shows a concise Groovy version using the left‑shift operator to write the stream directly to a new file: new File(name) << new URL(url).openStream().
Filename Processing
Describes a helper handlePicName(String url) that removes a trailing “.webp”, extracts the file name after the last “/”, strips any unknown suffix, and returns a Tuple2 containing the cleaned URL and file name. The method demonstrates Groovy tuple types from Tuple2 up to Tuple9.
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