throws ServletException, IOException {
String oper1 = request.getParameter("oper1");
String oper2 = request.getParameter("oper2");
String operator = request.getParameter("operator");
Calculator calc = new Calculator();
calc.setOper1(Integer.parseInt(oper1));
calc.setOper2(Integer.parseInt(oper2));
int result = 0;
if(operator.equals("+")){
result = calc.add();
}else if(operator.equals("-")){
result = calc.minus();
}else if(operator.equals("*")){
result = calc.multiplication();
}else if(operator.equals("/")){
result = calc.div();
}else{
}
// �õ�session�ռ�