将文件 FTP 到服务器，但结果以零字节大小到达

FTP a file to server, but it the result arrives with zero byte size(将文件 FTP 到服务器，但结果以零字节大小到达)

问题描述

我正在尝试使用 FTPClient 将文件上传到数据库服务器.显示文件传输成功，但文件为空(大小为0字节).

I am tring to upload a file to a database server using FTPClient. It shows the file is transfered succesfully, but the file is empty (size 0 bytes).

以下是我用来构建的源代码.谁能解决这个问题?

Below is the source code that I have used to build. Can anyone resolve this issue?

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
                }
            }
        }
    }
}

推荐答案

我删除了client.changeWorkingDirectory("/loaddata");否则保持原样并获得成功.线路会不会有问题?比我再次使用 commons 3.1

I removed the client.changeWorkingDirectory("/loaddata"); otherwise left it all intact and got success. Could the line be a problem? Than again I used commons 3.1

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