try {
			Class.forName("com.mysql.jdbc.Driver");
			Connection con=DriverManager.getConnection("jdbc:mysql://192.168.100.75:3307/dac22", "dac22","welcome");
           Statement s=con.createStatement();
           String query="select uname,password from exam where uname=? and password=?";
         PreparedStatement ps=con.prepareStatement(query);
         ps.setString(1, u);
         ps.setString(2, p);
         ResultSet rs=ps.executeQuery();
         if(rs.next())
         {
             String u1=rs.getString(1);
             String p1=rs.getString(2);


           System.out.println(rs.getString(1)+" "+rs.getString(2));
           if(u.equals(u1)&& p.equals(p1))
           {
        	   rd=request.getRequestDispatcher("Hello_world.jsp");


   			session=request.getSession();
   			session.setAttribute("name", u);
   			rd.forward(request, response);
           }

           else
   		{
   			rd=request.getRequestDispatcher("Login.jsp");
           pw.write("wrong");
   			rd.include(request, response);

   		}
         }
		} catch (ClassNotFoundException e) {

			e.printStackTrace();
		} catch (SQLException e) {

			e.printStackTrace();
		}

	}