ftp保存文件失败，求助！！！！！！！！！！！！！！！

[qianxinxuejishu]

ftp上传文件，在最后一步保存文件时失败，代码如下：
ftpc.storeFile(fileName, fis);
执行结果总是失败
public boolean uploadFile(String fileName, FileInputStream fis)
{
FTPClient ftpc = new FTPClient();
try
{
// 连接
ftpc.connect(this.getHostName(), this.getHostPort());

int reply = ftpc.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply))
{
ftpc.disconnect();
logger.error("FTP server refused connection.");
return false;
}

// 登录及目录切换
ftpc.login(this.getUsername(), this.getPassword());
boolean isChageDirSucess1 = ftpc.changeWorkingDirectory(this.getRemoteDir());
System.out.println(isChageDirSucess1);
// 目录检查
String dirName = this.getSavePath().substring(1);
boolean isChageDirSucess = ftpc.changeWorkingDirectory(dirName);
System.out.println(isChageDirSucess);
ftpc.setFileType(FTP.ASCII_FILE_TYPE);
if (isChageDirSucess)
{
boolean ff = ftpc.storeFile(fileName, fis);
System.out.println(ff);
}
else
{
boolean flag = ftpc.makeDirectory(dirName);
if (flag)
{
logger.info("make Directory " + this.getSavePath() + " succeed");
}
else
{
logger.info("make Directory " + this.getSavePath() + " false");
return false;
}
ftpc.changeWorkingDirectory(dirName);
ftpc.storeFile(fileName, fis);
}