获取文件大小，远程文件是否可以访问

最新推荐文章于 2021-05-26 03:55:47 发布

原创最新推荐文章于 2021-05-26 03:55:47 发布 · 714 阅读

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CC 4.0 BY-SA版权

文章标签：

#string #path #exception #url #file

本文提供了一种通过Java代码获取本地及远程文件大小的方法，并详细展示了如何利用URL和HttpURLConnection来获取远程文件的大小。

个人收藏小代码：

public static String getFileSize(String path) {
    File ff = new File(path);
    String tmplen = "0.0";
    if (ff.exists()) {
      long len = ff.length();
      tmplen = (new StringBuffer(String.valueOf(len / 1024L))).toString();
    }
    else {
      tmplen = getRemoteFileSize(path);
    }
    return tmplen;
}

public static String getRemoteFileSize(String path) {
    String tmplen = "1.0";
    try {
      URL url = new URL(path);
      HttpURLConnection httpConnection = (HttpURLConnection) url
          .openConnection();
      if (httpConnection.getResponseCode() == 200) {
        long filelen = httpConnection.getContentLength();
        tmplen = (new StringBuffer(String.valueOf(filelen / 1024L))).toString();
      }
    }
    catch (UnknownHostException unknow) {
      logger.error("GetRemoteFileSize error1:" + unknow);
      //unknow.printStackTrace();
    }
    catch (IOException ioe) {
      logger.error("GetRemoteFileSize error2:" + ioe);
      //ioe.printStackTrace();
    }
    catch (Exception e) {
      logger.error("GetRemoteFileSize error3:" + e);
      //e.printStackTrace();
    }