URL url = new URL(downloadUrl);

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

conn.setConnectTimeout(5 * 1000);

conn.setRequestProperty("Accept-Language", Params.ACCEPT_LANGUAGE);

conn.setRequestProperty("Charset", Params.ChARSET);

conn.setRequestMethod("GET");

conn.setRequestProperty("Connetion", "Keep-Alive");

// 文件大小

int fileSize = conn.getContentLength();

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本文标题：网络基础 http获取文件大小，责任编辑：宏鹏，来源：武汉北大青鸟鲁广校区栏目，于11-11发布于北大青鸟鲁广校区。http获取文件大小