小编Sip*_*eng的帖子

/*我在localhost上运行一个FTP服务器.当我下载文件时使用ftpClient.retrieveFile()方法,它的replyCode是550.我读了commons-net的API并找到了550 replyCode,定义是"public static final int FILE_UNAVAILABLE 550".但我无法从我的代码中找到问题.
谢谢你的帮助.

*/

    FTPClient ftpClient = new FTPClient();
    FileOutputStream fos = null;

    try {
        ftpClient.connect("192.168.1.102",2121);
        ftpClient.login("myusername", "12345678");
        ftpClient.setControlEncoding("UTF-8");
        ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
        String remoteFileName = "ftpserver.zip";//this file in the rootdir
        fos = new FileOutputStream("f:/down.zip");
        ftpClient.setBufferSize(1024);
        ftpClient.enterLocalPassiveMode();
        ftpClient.enterLocalActiveMode();
        ftpClient.retrieveFile(remoteFileName, fos);  
        System.out.println("retrieveFile?"+ftpClient.getReplyCode());
        fos.close();
        ftpClient.logout();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            ftpClient.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
            throw new RuntimeException("??FTP??", e);
        }
    }