[JAVA] [XML] Obtaining earthquake information from the Japan Meteorological Agency ①

The road to acquisition and analysis of the Japan Meteorological Agency XML

① XML download (this time) ② Analysis of XML file (next time)

Get the XML file from the Japan Meteorological Agency

Create a class to perform the download.

XMLDownloader.java

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;

public class EarthquakeXMLDownloader implements Runnable {

	//Japan Meteorological Agency link (http)://www.data.jma.go.jp/developer/xml/feed/eqvol.xml）
	String link;

	//Where to download
	File out;

	public EarthquakeXMLDownloader (String link, File out) {
		this.link = link;
		this.out = out;
	}

	@Override
	public void run() {

		try {
			URL url = new URL(link);
			HttpURLConnection http = (HttpURLConnection) url.openConnection();
			double fileSize = (double)http.getContentLengthLong();
			BufferedInputStream in = new BufferedInputStream(http.getInputStream());
			FileOutputStream fos = new FileOutputStream(this.out);
			BufferedOutputStream bout = new BufferedOutputStream(fos, 1024);
			byte[] buffer = new byte[1024];
			double downloaded = 0.00;
			int read = 0;
			double percentDownloaded = 0.00;

			while((read = in.read(buffer, 0, 1024))>= 0) {
				bout.write(buffer, 0, read);
				downloaded += read;
				percentDownloaded = (downloaded*100)/fileSize;
				String percent = String.format("%.4f", percentDownloaded);
				System.out.println("Downloaded " + percent + "of a file.");
			}

			bout.close();
			in.close();
			System.out.println("Download complete.");
		}catch (IOException ex) {
			ex.printStackTrace();
		}
	}
}

Execute the file above.

Main.java

import java.io.File;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Main {

	public static void main(String[] args) {

		//Create a file path to output
		// ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
		LocalDateTime now = LocalDateTime.now();
		DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyyMMdd_HHmm");
		String fileName = "earthquake_" + now.format(dateTimeFormatter);
		String link = "http://www.data.jma.go.jp/developer/xml/feed/eqvol.xml";

		File out = new File("C:\\pleiades\\workspace\\SAX\\resource\\" + fileName + ".xml");
		// ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

		//Execute.
		new Thread(new EarthquakeXMLDownloader(link,out)).start();

	}

}