Linux unzip command: Option to force overwrite?

I am writing a shell script that unzips a ZIP file into an existing hierarchy of files, potentially overwriting some of the files.

The problem is that the unzip command asks for confirmation:
replace jsp/extension/add-aspect.jsp? [y]es, [n]o, [A]ll, [N]one, [r]ename: y

Is there an option to force unzip to overwrite the files?

According to http://www.manpagez.com/man/1/unzip/ you can use the -o option to overwrite files:

unzip -o /path/to/archive.zip

Note that -o, like most of unzip's options, has to go before the archive name.

If you need to unzip in order to replace the new files only, you can use

unzip -f archieve.zip

But for future references, you can just type

unzip 

and you will get a list of the arguments for this package. The possible arguments are for this case are:

-f  freshen existing files, create none
-n  never overwrite existing files         
-q  quiet mode (-qq => quieter)
-o  overwrite files WITHOUT prompting    

Use the one that you feel more suited for you needs.