我正在使用 Apache Commons Net 的 FTPClient 从位于服务器上的文件中读取内容。仅读取一次时效果很好。但是当我尝试读取第二个文件时,FTPClient 的 InputStream 返回 null。这是我的代码:
FTPClient ftpClient = new FTPClient();
ftpClient.connect("myhostname");
ftpClient.login("myusername", "mypassword");
// read InputStream from file
InputStream inputStream = ftpClient.retrieveFileStream("/my/firstfile.txt");
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
// read every line...
// close everything
inputStream.close();
bufferedReader.close();
// second try
inputStream = ftpClient.retrieveFileStream("/my/secondfile.txt");
bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
// ...
inputStream.close();
bufferedReader.close();
我做错了什么?
最佳答案
关闭InputStream
后,执行以下操作:
ftpClient.completePendingCommand();
您可以在 javadoc of FTPClient#retrieveFileStream 中找到更多信息:
To finalize the file transfer you must call completePendingCommand and check its return value to verify success. If this is not done, subsequent commands may behave unexpectedly.
关于java - 如何正确关闭FTPClient FileStream,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47040594/