在业务控制方法中写入Request，Response等传统web参数

可以在业务控制方法中书写传统web参数，这种方式我们不提倡，耦合了

@Controller
@RequestMapping(value="/user")
public class UserAction{
    @RequestMapping(value="/add",method=RequestMethod.POST)
    public void add(HttpServletRequest request,HttpServletResponse response) throws Exception{
        System.out.println("HelloAction::add()::POST");
        int id = Integer.parseInt(request.getParameter("id"));
        String name = request.getParameter("name");
        double sal = Double.parseDouble(request.getParameter("sal"));
        System.out.println(id + ":" + name + ":" + sal);
        request.getSession().setAttribute("id",id);
        request.getSession().setAttribute("name",name);
        request.getSession().setAttribute("sal",sal);
        response.sendRedirect(request.getContextPath()+"/register.jsp");
    }    
}