這個人做的工作：

public class Download {

private static boolean isRedirected( Map> header ) {

for( String hv : header.get( null )) {

if( hv.contains( " 301 " )

|| hv.contains( " 302 " )) return true;

}

return false;

}

public static void main( String[] args ) throws Throwable

{

String link =

"http://github.com/downloads/TheHolyWaffle/ChampionHelper/" +

"ChampionHelper-4.jar";

String fileName = "ChampionHelper-4.jar";

URL url = new URL( link );

HttpURLConnection http = (HttpURLConnection)url.openConnection();

Map< String, List< String >> header = http.getHeaderFields();

while( isRedirected( header )) {

link = header.get( "Location" ).get( 0 );

url = new URL( link );

http = (HttpURLConnection)url.openConnection();

header = http.getHeaderFields();

}

InputStream input = http.getInputStream();

byte[] buffer = new byte[4096];

int n = -1;

OutputStream output = new FileOutputStream( new File( fileName ));

while ((n = input.read(buffer)) != -1) {

output.write( buffer, 0, n );

}

output.close();

}

}

總結

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