How can i download many file from server one times.

Hi,
I want to create the service to download multi-files from web server one time
from browser. It seems no way to do it. My soulition is compressing the files
to zip before download it. The problem is that when the user uncompresses the
files,full path of downloaded files are setted. Look like this:
/usr/tmp/test/file1
/usr/tmp/test/file2
/usr/tmp/test/file3
My question is :
1. Is there any way not to specify the full path of a file when
add the file to zip.
Here is the source
BufferedInputStream bis
= new BufferedInputStream(
new FileInputStream( file ) );
//if not full path . can is works?????
ZipEntry target = new ZipEntry( file.getPath() );
// zos is ZipOutputStream
zos.putNextEntry( target );
int c;
while( ( c = bis.read() ) != EOF ) {
zos.write( (byte)c );
2. Is there any way to get and change the current work directory of my server ?
Please help!!

If i use file.getName(). I will lost the struct of path.
I means that,if i compress the list of files:
/usr/tmp/test1/file1
/usr/tmp/test1/file2
/usr/tmp/test2/file3
can i keep the part of path's strcut. (usr/tmp/../.. etc.)
I tried to do as this:
target = new ZipEntry( file.getPath.substring(1));
an error be reported when uncompressed the zip file.
error message:
warning [zt000002.zip]: extra 28 bytes at beginning or within Zip file (attempting to process anyway)
Error in file #1: bad Zip file offset (Error local header signature not found): 0
(attempting to re-compensate)
Extracting 20030109.xls
Error: unexpected end of file encountered
Error: invalid compressed data to inflate
Why? can i set "any" entry name??

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