如何從服務器獲取文件的大小？

解決方法

下麵的示例演示如何從服務器獲取文件大小。

import java.net.URL;
import java.net.URLConnection;

public class Main {
   public static void main(String[] argv) 
   throws Exception {
      int size;
      URL url = new URL("http://www.server.com");
      URLConnection conn = url.openConnection();
      size = conn.getContentLength();
      if (size < 0)
      System.out.println("Could not determine file size.");
      else
      System.out.println("The size of file is = "
      +size + "bytes");
      conn.getInputStream().close();
   }
}

結果

上麵的代碼示例將產生以下結果。

The size of file is = 16384 bytes