Question

I created a JSP page where I created a search form where the user can see some specific records of a student in the same page just below the search button. The search is done as follows:

"select col1, col2 from table1 where regn_no='"+regn_no+"'";

After displaying two columns(col1, col2), I have another button in the same jsp page to view the details to see details of the particular student based on the regn_no. The search button is working fine, but the view details button not. I do not know how to call the same servlet. Any help will be much appreciated.

Answer 1

The button’s name=value pair get sent as HTTP request parameter as well. Assuming that you’ve

<input type="submit" name="search" value="Search">

and

<input type="submit" name="view" value="View">

then you can distinguish the button pressed in the servlet as follows:

if (request.getParameter("search") != null) {
    // Search button pressed.
} else if (request.getParameter("view") != null) {
    // View button pressed.
}

See also:

• Hidden features of HTML

---

Unrelated to the problem, you’ve got a SQL injection risk there. Use PreparedStatement.