CODEWITHSUNDEEP
javaftpapache-commons
jn025
jn025

Reputation: 2895

java downloading zip file is corrupted

I am using appache commons method to download some files from my FTP server and I am having some issues with the zip file being corrupted. I am able to download the file and place the file in the correct folder but when I open it there are files missing and it claims it's corrupted, if I try downloading with normal .txt files it works fine. 

public boolean downloadFiles(String folder, String file) throws Exception
{
    File output = new File(folder + "\\" + file);
    System.out.println(output);
    FileOutputStream out    =   new FileOutputStream(output);
    client.retrieveFile(file, out);
    out.close();

    if(output.exists())      
        return true;
    else
        return false;

}

Upvotes: 1

Views: 1469

Answers (2)

Fabian Tschachtli
Fabian Tschachtli

Reputation: 361

Make sure you use binary mode for the FTP transfer. The fact that txt files work indicates that this is most likely your problem.

Upvotes: 3

ppuskar
ppuskar

Reputation: 771

The file you are downloading on java client, try opening manually going to the FTP location itself. see if the zip file is okay or not. i had similar issue and found out that zip file was corrupt. Second step would be , check the size of the zip file you are downloading and the size of the downloaded file.

Upvotes: 1

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