import java.net.URL;
import java.net.URLConnection;
public class Main {
public static void main(String[] args) throws Exception {
int size;
URL url = new URL("http://www.zyiz.net/wp-content/themes/zyiz/assets/img/newlogo.png");
URLConnection conn = url.openConnection();
size = conn.getContentLength();
if (size < 0)
System.out.println("无法获取文件大小。");
else
System.out.println("文件大小为:" + size + " bytes");
conn.getInputStream().close();
}
}