ftpsclient 的listfiles返回值为空

public boolean ftptest(String server,String userName,String passWord）{
final int dataTimeout = 5000;
          X509TrustManager x509m = new X509TrustManager() {  

                @Override  
                public X509Certificate[] getAcceptedIssuers() {  
                    return null;  
                }  

                @Override  
                public void checkServerTrusted(X509Certificate[] chain,  
                        String authType) throws CertificateException {  
                }  

                @Override  
                public void checkClientTrusted(X509Certificate[] chain,  
                        String authType) throws CertificateException {  
                }  
            };  
            SSLContext sslcontext =     SSLContext.getInstance("SSL");
            sslcontext.init(null, new TrustManager[] { x509m },  
                    new java.security.SecureRandom());  
    FTPSClient ftpsClient = new FTPSClient(false,sslcontext);
 try {
                ftpsClient.connect(server,21);
            boolean iflogin = ftpsClient.login(userName, passWord);
                        ftpsClient.enterLocalPassiveMode();
                        ftpsClient.setDataTimeout(dataTimeout);
                         FTPFile[] listFiles = ftpsClient.listFiles();//listFiles 为空
            String[] listNames = ftpsClient.listNames();//listNames 为空
                          if(listNames==null){
                    System.out.println("结果为空");
                }
                                 ftpsClient.logout();
                 ftpsClient.disconnect();
} catch (SocketException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
}

看了你的问题描述，找到一篇相同问题的文章，http://qdpurple.iteye.com/blog/855120。
祝好!

嗯，谢谢，但是还是解决不了