[英]Connect JProgressBar with download process
I have the below code. 我有下面的代码。 I can't make it work.
我不能使它工作。
I have to mention that the URL is redirecting. 我不得不提到URL正在重定向。 I mean that
url = http://www.thissite.com
and redirects to http://www.othersite.com
. 我的意思是
url = http://www.thissite.com
并重定向到http://www.othersite.com
。 But I want to get it work with the initial url
. 但我想让它与初始
url
。
public void download(String address, String localFileName, JProgressBar progress ) {
OutputStream out = null;
URLConnection conn = null;
InputStream in = null;
try {
URL url = new URL(address);
// Open an output stream to the destination file on our local filesystem
out = new BufferedOutputStream(new FileOutputStream("/MusicDownloads/"+localFileName));
conn = url.openConnection();
in = conn.getInputStream();
int length = conn.getContentLength(); //find out how long the file is, any good webserver should provide this info
int current = 0;
progress.setMaximum(length); //we're going to get this many bytes
progress.setValue(0); //we've gotten 0 bytes so far
// Get the data
byte[] buffer = new byte[1024];
int numRead = 0;
while ((numRead = in.read(buffer)) != -1) {
current=0;
out.write(buffer, current, numRead);
current += numRead; //we've progressed a little so update current
progress.setValue(current); //tell progress how far we are
}
// Done! Just clean up and get out
} catch (Exception exception) {
exception.printStackTrace();
} finally {
try {
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
} catch (IOException ioe) {
// Shouldn't happen, maybe add some logging here if you are not
// fooling around ;)
}
}
}
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