Problem in unzipping a file : ZipInputStream

Question

Hi All,
I am having some issues in unzipping a zip file using ZipInputStream.
Following is the code :
public class ZipInputStreamExample {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          final int BUFFER = 2048;
          try {
               ZipInputStream zip = new ZipInputStream(new BufferedInputStream(
                         new FileInputStream(
                                   "OBU4526 - Change to mobile services pages-1.zip")));
               ZipEntry entry;
               System.out.println("hello world");
               while ((entry = zip.getNextEntry()) != null) {
                    System.out.println("Unzipping: " + entry);
                    int count;
                    byte[] data = new byte[BUFFER];
                    FileOutputStream fout = new FileOutputStream(entry.getName());
                    BufferedOutputStream buf = new BufferedOutputStream(fout,
                              data.length);
                    while ((count = zip.read(data, 0, BUFFER)) != -1) {
                         buf.write(data, 0, count);
                    buf.flush();
                    buf.close();
               zip.close();
          } catch (FileNotFoundException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
}Following is the exception which I am getting :
hello world
Unzipping: OBU4526 - Change to mobile services pages/css/
java.io.FileNotFoundException: OBU4526 - Change to mobile services pages\css (The system cannot find the path specified)
     at java.io.FileOutputStream.open(Native Method)
     at java.io.FileOutputStream.<init>(Unknown Source)
     at java.io.FileOutputStream.<init>(Unknown Source)
     at com.example.io.ZipInputStreamExample.main(ZipInputStreamExample.java:37)Any problem with the code ? How could I solve this issue ? Do I need to create the directory structure (OBU4526 - Change to mobile services pages\css) ? Shouldn't the FileOutputStream create the structure if it isn't created. ?
Any help would be appreciated.
Thanks
Siddharth

Answer 1

ejp wrote:
Delete that directory and try again.I did that and tried again. I refreshed and noticed that what is happening is that top level folder is being created but after that sub folders are not being created. It is not recognizing sub folders under the top level folders. Under the top level folder its directly making the file instead of making the folder. Following is the code snippet:
while ((entry = zip.getNextEntry()) != null) {
                    System.out.println("Unzipping: " + entry);
                    int count;
                    new File(entry.getName()).getParentFile().mkdirs();
                    bos = new BufferedOutputStream(new FileOutputStream(entry.getName()));
                    while((count = zip.read(b, 0, BUFFER)) != -1){
                         bos.write(b, 0, count);
               zip.closeEntry();
               }Its also giving the following exception :
Unzipping: OBU4526 - Change to mobile services pages/css/
Unzipping: OBU4526 - Change to mobile services pages/css/discover-activate.css
java.io.FileNotFoundException: OBU4526 - Change to mobile services pages\css\discover-activate.css (The system cannot find the path specified)
     at java.io.FileOutputStream.open(Native Method)
     at java.io.FileOutputStream.<init>(Unknown Source)
     at java.io.FileOutputStream.<init>(Unknown Source)
     at com.example.io.ZipInputStreamExample.main(ZipInputStreamExample.java:41)It has created the folder "OBU4526 - Change to mobile services pages" but not "css". Instead of creating the folder css its creating the file css. Instead it should create the folder "css" also and then create the file "discover-activate.css". I don't know why its giving this exception. :(
By this exception I suppose its asking us to create the css folder also. I am correct.
What's the resolution of this issue.?
Please do help me in resolving this issue. Thanks in advance.