java - 模型(在 MVC 中)和 DAO 应该如何交互？

Question

模型和 DAO 应该如何交互？我正在组装一个简单的登录模块，但我不确定将“业务逻辑”放在哪里。如果我将逻辑与数据一起放入模型中，我将如何访问逻辑？

目前，我有:

1. A controller that receives form data
2. A model that is a simple reflection of a db table
3. A DAO that using hibernate performs a simple select query, based on the form parameters received by the controller.

Answer 1

Controller 必须找到/加载与请求匹配的业务对象并执行它。 Strategy Pattern对此很有用。业务对象必须获取 DAO 的句柄和模型来执行该流程。

例如(伪，在前端 Controller servlet 内)

public void process(request, response) {
    View view = new View(request, response);
    Action action = ActionFactory.getAction(request);
    if (action != null) action.execute(view);
    view.navigate();
}