import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; public class CourseSelector extends HttpServlet { public void init() throws ServletException { } public void doGet( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException { /** for many pairs, use Map */ String course; if( (course = request.getParameter("course")) != null ) { if( course.equals("cs202") ) response.sendRedirect("http://www.google.com"); else if( course.equals("cs320") ) response.sendRedirect("http://www.yahoo.com"); else ; } response.setContentType( "text/html" ); PrintWriter out = response.getWriter(); out.print( "" ); out.println( "Some Servlet" ); out.println( "" ); // some code here out.println( "
" ); out.println( "" ); out.println( "
" ); out.println( "" ); out.println( "" ); } public void doPost( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException { doGet( request, response ); } }