i need to come out with a function to show size transfer rate per second.
I have to download a file from web with my java code and display the transfer rate per second while downloading the file.
please note the code below is not totally mine, it was taken from here
The code below only can calculate transfer rate after the download has finished, but i currently have no idea how to make the code to display transfer rate every second, any conceptual idea or code suggestion?
public static void main(String argc[]) throws Exception {
long totalDownload = 0; // total bytes downloaded
final int BUFFER_SIZE = 1024; // size of the buffer
byte[] data = new byte[BUFFER_SIZE]; // buffer
BufferedInputStream in = new BufferedInputStream(
new URL(
"http://ipv4.download.thinkbroadband.com:8080/5MB.zip")
.openStream());
int dataRead = 0; // data read in each try
long startTime = System.nanoTime(); // starting time of download
while ((dataRead = in.read(data, 0, 1024)) > 0) {
totalDownload += dataRead; // adding data downloaded to total data
System.out.println(totalDownload);
}
/* download rate in bytes per second */
float bytesPerSec = totalDownload
/ ((System.nanoTime() - startTime) / 1000000000);
System.out.println(bytesPerSec + " Bps");
/* download rate in kilobytes per second */
float kbPerSec = bytesPerSec / (1024);
System.out.println(kbPerSec + " KBps ");
/* download rate in megabytes per second */
float mbPerSec = kbPerSec / (1024);
System.out.println(mbPerSec + " MBps ");
}
See Question&Answers more detail:
os 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…