What ?
I'm guessing you're asking: How do you return a different value based on a link the user clicks on ?
All you need to do is add a different parameter to each link, for example:
<a href="/myapp/myservlet?nr=1">link 1</a>
<a href="/myapp/myservlet?nr=2">link 2</a>
<a href="/myapp/myservlet?nr=3">link 3</a>
.
.
.
<a href="/myapp/myservlet?nr=99">link 99</a>
etc...