Month: June 2021

 Example code for downloading a zipped file and unzipping in java

public static void main(String[] args) throws Exception {
    String mmdb = "https://someaddress/somefile.gz";
    String zipFilename = "somefile.gz";
    if (!Files.exists(Path.of(zipFilename))) {
        System.out.println(mmdb);
        Files.copy(
                new URL(mmdb).openStream(),
                Paths.get(zipFilename));
        try (GZIPInputStream gis = new GZIPInputStream(new FileInputStream(Path.of(zipFilename).toFile()))) {
            Files.copy(gis, Path.of(dbFileName));
        }
    }
 
    SpringApplication.run(Application.class, args);
}