获取文件长度http,ftp

ftp:

FTPClient ftp = new FTPClient();
ftp.setConnectTimeout(1000);
ftp.setDataTimeout(1000); 
ftp.connect(hostName, port);
ftp.login(userName, password);
ftp.setControlEncoding("gb2312");
FTPFile[] files = ftp.listFiles(realPath);
if(files.length > 0){
                         return files[0].getSize();
}

 

 

 

http:

long len = 0;
HttpURLConnection conn = null;
      try {
        URL u = new URL(path);
        conn = (HttpURLConnection) u.openConnection(); 
        conn.setConnectTimeout(1000);
        conn.connect(); 
        if(conn.getResponseCode() == conn.HTTP_OK)
              len =  conn.getContentLength();
         } catch (Exception e) {
                    len = 0;
                    e.printStackTrace();
          }finally{
                    if(conn != null) conn.disconnect();
           }
return len;