Zipping a folder which contains subfolders

Question

public static void main(String argv[]){
    try
         {
        String date=new java.text.SimpleDateFormat("MM-dd-yyyy").format(new java.util.Date());
         File inFolder=new File("Output/" + date + "_4D");
         File outFolder=new File("Output/" + date + "_4D" + ".zip");
      ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(outFolder)));
      BufferedInputStream in = null;
      byte[] data    = new byte[1000];
      String files[] = inFolder.list();
      for (int i=0; i<files.length; i++)
          {
              in = new BufferedInputStream(new FileInputStream(inFolder.getPath() + "/" + files[i]), 1000);                  
        out.putNextEntry(new ZipEntry(files[i])); 
          int count;
          while((count = in.read(data,0,1000)) != -1)
            {
               out.write(data, 0, count);
            }
          out.closeEntry();
          }
          out.flush();
          out.close();
      }
     catch(Exception e)
     {
              e.printStackTrace();
     } 
}

Am trying to zip a folder which contains subfolders. Trying to zip the folder named 10-18-2010_4D.The above programs ends with the following exception. Please advise on how to clear the issue.

java.io.FileNotFoundException: Output\10-18-2010_4D\4D (Access is denied)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    at ZipFile.main(ZipFile.java:17)

Answer 1

I would include the ant task for zipping - it's way easier to work with. The task calss is: org.apache.tools.ant.taskdefs.Zip (use it programatically)

Answer 2

You need to check if the file is a directory because you can't pass directories to the zip method.

Take a look at this page which shows how you can recursively zip a given directory.