java FTP上传创建空文件 [英] java FTP upload creates empty file

问题描述

$ b

  imports * 
 
 public class ftpUpload {
 
 public static void main（String [] args）{
 
 FTPClient ftp = new FTPClient（）; 
 int回覆; 
 
 //连接
尝试{
 
 ftp.connect（serverAdd）; 
 ftp.login（用户名，密码）; 
 reply = ftp.getReplyCode（）; 
 
 if（FTPReply.isPositiveCompletion（reply））{
 System.out.println（Connected Success ..）; 
 
 //上传文件
尝试{
 String fileDir =testfile.txt; 
 FileInputStream in = null; 
 in = new FileInputStream（fileDir）; 
 ftp.storeFile（fileDir，in）; 
 System.out.println（File upload complete ..）; 
} catch（IOException e）{
 System.out.println（e）; 
} 
 
 ftp.disconnect（）; 
 System.out.println（Disconnected ..）; 
 
} else {
 System.out.println（Connection Failed ..）; 
 ftp.disconnect（）; 
} 
 
} catch（SocketException ex）{
 ex.printStackTrace（）; 
} catch（IOException ex）{
 ex.printStackTrace（）; 
 
 
 
 $ / code $ / pre 
 
 
创建一个文件FTP服务器的根目录，但它是空的。怎么了？上传PDF文件时，我已经尝试将ftp模式更改为BINARY。但该文件的大小也是0。 
  ftp.setFileType（FTP.BINARY_FILE_TYPE）; 
  
我也只想上传一堆txt文件，所以默认的ascii模式应该没问题，对？ 
解决方案
好的，它似乎是我的防火墙的一个探针。当我停用防火墙时，文件将被写入到ftp中，没有问题。 
When I try to upload a simple text file with the apache commons ftpClient and this code:
imports*

public class ftpUpload {

public static void main(String[] args) {

    FTPClient ftp = new FTPClient();
    int reply;

    // connect
    try {

        ftp.connect(serverAdd);
        ftp.login(username,password);
        reply = ftp.getReplyCode();

        if(FTPReply.isPositiveCompletion(reply)){
            System.out.println("Connected Success..");

            // upload file
            try {
                String fileDir = "testfile.txt";
                FileInputStream in = null;       
                in = new FileInputStream(fileDir);     
                ftp.storeFile(fileDir,in);
                System.out.println("File upload complete..");
            }catch(IOException e){
                System.out.println(e);
            }

            ftp.disconnect();
            System.out.println("Disconnected..");

        }else {
            System.out.println("Connection Failed..");
            ftp.disconnect();
        }   

    } catch (SocketException ex) {
        ex.printStackTrace();
    } catch (IOException ex) {
        ex.printStackTrace();
    }
  }
}
A file gets created in the root of the FTP server but it is empty. what´s wrong? I already tried to change the ftp mode to BINARY when uploading a PDF file. but the file is also 0 in size. 
ftp.setFileType(FTP.BINARY_FILE_TYPE);
I also only want to upload a bunch of txt files, so the default ascii mode should be fine, right? 
解决方案
ok, it seems that it is a probem with my firewall. when I deactivate the firewall the file gets written to the ftp with no problem.

                        
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