我正在尝试使用FTPClient将文件上传到数据库服务器.它显示文件已成功传输,但是文件为空(大小为0字节).

以下是我用来构建的源代码.谁能解决这个问题？

package Examples;

import org.apache.commons.net.ftp.*;

import java.io.FileInputStream;

import java.io.IOException;

public class Main {

public static void main(String[] args) {

FTPClient client = new FTPClient();

FileInputStream fis = null;

try {

client.connect("server");

client.login("userid", "password");

System.out.print("Message : " + client.getReplyString());

client.changeWorkingDirectory("/loaddata");

System.out.println("Working Directory" + client.printWorkingDirectory());

client.setDefaultPort(22);

int f1 = client.getDefaultPort();

boolean f2 = client.setFileType(FTPClient.BINARY_FILE_TYPE);

System.out.println("File transfer port no " + f1);

System.out.println("FTP server reply ." + client.getReplyString());

String localfile = "c:/Touch.txt";

fis = new FileInputStream(localfile);

int lastSlash = localfile.lastIndexOf('/');

String filename = localfile.substring(lastSlash+1);

System.out.println("file : "+fis);

client.setFileTransferMode(2);

System.out.println("Flag reply ." + client.getReplyString());

boolean flag = client.storeFile(filename,fis);

System.out.println("Flag reply ." + client.getReplyString());

if (flag) {

System.out.println("Successfully uploaded the file");

} else {

System.out.println("Not able to upload the file");

}

fis.close();

client.logout();

System.out.println("Logout ." + client.getReplyString());

} catch (Exception e) {

System.out.println("Exception " + e);

} finally {

if (client.isConnected()) {

try {

client.disconnect();

System.out.println("Server Disconnected." + client.getReplyString());

} catch (IOException ioe) {

// do nothing

}

}

}

}

}