[英]How to download file from FTP using Java?
With this code iI always get a empty file. 使用此代码,我总是得到一个空文件。
What I have to do with it? 我该怎么办?
login
is always true
. login
始终为true
。 (ofc, here is not real password) (ofc,这里不是真实密码)
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import java.io.*;
public class Logs {
public static void main(String[] args) {
FTPClient client = new FTPClient();
try {
client.connect("myac.cs-server.pro", 121);
boolean login = client.login("a3ro", "passWordIsSecret");
System.out.println(login);
String remoteFile1 = "myac_20150304.log";
File downloadFile1 = new File("C:\\Users\\Aero\\Desktop\\test\\myac.log");
OutputStream outputStream1 =
new BufferedOutputStream(new FileOutputStream(downloadFile1));
boolean success = client.retrieveFile(remoteFile1, outputStream1);
System.out.println(success);
outputStream1.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
client.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
Use something like this: 使用这样的东西:
InputStream inputStream = client.retrieveFileStream(remoteFileNameHere);
To retrieve the remote file input stream. 检索远程文件输入流。
Then you can use to copy the stream to desired file: 然后,您可以使用将流复制到所需文件:
FileOutputStream out = new FileOutputStream(targetFile);
org.apache.commons.io.IOUtils.copy(in, out);
Use FileOutputStream
: 使用FileOutputStream
:
String filename = "test.txt";
FileOutputStream fos = new FileOutputStream(filename);
client.retrieveFile("/" + filename, fos);
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