Unzip

[Mary Cole]

Hi..
I have a zip file which comes from DB as a blob and I need to check the contents of the files after unzipping.The checks I need to make are..
1) The zip file should not contain more than one file in it
2)The file inside the zip file should be in a particular extension( like .xml or xls).
Am using servlets to get the data from the DB perform all these operations.
Any inputs as to how to procees will be helpful
Thx

[Gregg Bolinger]

Mary,
It seems to me that you have the Servlet part already figured out. So I think I will move this to the IO and Streams forum so those experts can handle your specific needs regarding Zipped files, extensions, etc.

[Sri Basavanahally]

Hello Mary !
the following shows how to unzip the a zip file, get the file names etc. It will help you.the classes you need are in java.util.zip.*;
when you get the zip file from the DB,create a zip file as follows:
ZipFile zipfile = new Zipfile(filename);
then: get the entries in the zip file:
Enumeration entries = zipfile.entries();
then you can go through all of them
while(entries.hasMoreElements())
{
//get the entry
ZipEntry entry = (ZipEntry)entries.nextElement();
//get file name
String name = entry.getName();

//parse the name
if(name.substring(..)){}
//OR
StringTokenizer st = new StringTokenizer(name,".");
----- so on-----
}//end while
Hope that helps

-Sri