请确保以BINARY_FILE_TYPE格式传输文件.也许ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);返回false?

Be sure to transfer files in BINARY_FILE_TYPE. Maybe ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); returns false?

顺便说一句，如果您以ASCII模式传输zip，几乎肯定会导致损坏.

By the way, if you transfer a zip in ASCII-mode, this will almost surely result corrupted.