問題描述
我有一個 CSV 文件，我需要復制它并在同一路徑中重命名它.
I have a CSV file, and I need to copy it and rename it in the same path.
我在 FTP 登錄后嘗試了這個:
I tried this after the FTP login:
InputStream inputStream = ftpClient.retrieveFileStream(cvs_name +".csv");
ftpClient.storeFile(cvs_name2 + ".csv",inputStream);
但是當我在服務器上驗證文件時，它是空的.如何復制文件并重命名?
But when I verify the file on the server, it's empty. How can I copy a file and rename it?
推薦答案
我相信你的代碼不能工作.您不能同時通過一個 FTP 連接下載和上傳文件.
I believe your code cannot work. You cannot download and upload a file over a single FTP connection at the same time.
你有兩個選擇:
首先將文件完全下載(到臨時文件或內存中).
Download the file completely first (to a temporary file or to a memory).
如何將 ftp 服務器上的文件復制到 java 中同一服務器上的目錄?顯示記憶"解決方案.注意 outputStream.toByteArray() 調用.
The accepted answer to How to copy a file on the ftp server to a directory on the same server in java? shows the "to memory" solution. Note the outputStream.toByteArray() call.
打開兩個連接(FTPClient 的兩個實例)并在實例之間復制文件.
Open two connections (two instances of the FTPClient) and copy the file between the instances.
InputStream inputStream = ftpClient1.retrieveFileStream(cvs_name + ".csv");
ftpClient2.storeFile(cvs_name2 + ".csv", inputStream);
這篇關于如何在 Java 中使用 FTPClient 復制 FTP 服務器中的文件?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！