会话中的Spring存储对象 [英] Spring store object in session

问题描述

我想用Spring实现购物车，所以我需要在会话中保存一个对象购物车（其中包含product，paymentType和deliveryType等属性）。我试图用bean创建它，并将属性scope设置为session，但它只是不起作用，我应该在我的控制器中使用一些额外的注释还是购物车上课？任何使用示例都非常有用:-)在此先感谢。

I would like to implement a shopping cart with Spring, so I need to save an object Cart ( which has attributes like products, paymentType and deliveryType ) in session. I've tried to create it with bean and attribute "scope" set to "session", but it just doesn't work, should I use some additional annotations in my controller or Cart class? Any example usage would be really helpful :-) Thanks in advance.

推荐答案

@Component
@Scope("session")
public class Cart { .. }

然后

@Inject
private Cart cart;

应该有效，如果它在Web上下文中声明（dispatcher-servlet.xml）。另一种选择是使用原始会话并将您的购物车对象放在那里：

should work, if it is declared in the web context (dispatcher-servlet.xml). An alternative option is to use the raw session and put your cart object there:

@RequestMapping(..)
public String someControllerMethod(HttpSession session) {
    session.setAttribute(Constants.CART, new Cart());
    ...
    Cart cart = (Cart) session.getAttribute(Constants.CART);
}

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