Java 尽管连接和登录成功，Apache FTPSClient仍无法放置文件

我使用Apache的FTPS客户端通过FTPS连接并将文件放置在服务器上。但它在方法上失败了

 String url = "myTestSTore.com";
 String user = "fake";
 String password = "reallyFake"

FTPSClient ftpClient = new FTPSClient();
ftpClient.connect(url);

ftpClient.enterLocalPassiveMode()

ftpClient.login(user, password);

def reply = ftpClient.getReplyCode();

println "Reply code after logging in is $reply"

FileInputStream fis = new FileInputStream(randomFile)
def reply2 = ftpClient.getReplyCode();

println "Reply Code before attempting file upload is $reply2"

boolean storeFileResult = ftpClient.storeFile(randomFile.getName(), fis)
def reply3 = ftpClient.getReplyCode();

println "Store file  $storeFileResult, reply Code after file upload is $reply3"

从这个输出是

 06 Aug 2018 11:39:30 - Connecting to ftp server: myTestSTore.com
 Reply code after logging in is 234
 Reply Code before attempting file upload is 230
 Store file result is false , 
       and reply Code after file upload is 522

根据回复代码，我们似乎可以连接和登录。但是storeFile方法返回false，之后的回复代码是500

有没有办法说明文件上传失败的原因

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简单地返回false并给出500并不能解释上传失败的原因。

能否调用ftpClient.getReplyString（）获取更多信息？