在独立应用程序中使用Spring [英] Using Spring in standalone apps

问题描述

我正在学习Spring，我对如何在独立应用程序中使用它（以及在使用它来制作Web应用程序时）提出了一个问题。到目前为止我编写的示例使用了一个简单的main方法，我通过调用getBean来检索bean。上下文对象。但是，您可能希望在多个类中执行此操作，因此您首先获取上下文然后调用getBean还是有其他更清洁的替代方案？或者这是你在独立和网络应用程序中这样做的方式吗？

I am learning Spring and I have a question regarding how you use it in standalone applications (and also when using it for making web applications). The examples I have been coded so far has used a simple main method where I retrieve beans by calling getBean on the. Context object. However, you probably want to do this in multiple classes so do you first get a context and then call getBean or are there other cleaner alternatives? Or is this the way you do it in standalone and web apps?

推荐答案

如果你正在调用 context.getBean（）无处不在，你可能错过了Spring的全部内容，这是一个依赖注入框架。

If you're calling context.getBean() everywhere, you're probably missing the whole point of Spring, which is a dependency injection framework.

独立app，你通常只调用 context.getBean（）一次（或者至少很少），以获得一个rootbean。这个bean由Spring注入其他bean，依此类推。

In a standalone app, you typically call context.getBean() only once (or at least, very rarely), in order to get a "root" bean. This bean is injected by Spring with other beans, and so on.

在Web应用程序中，这完全取决于您使用的框架。但通常情况下，您在web.xml中注册一个监听器，为您加载上下文，并由Spring创建和/或注入控制器。

In a web app, it all depends on which framework you use. But typically, you register a listener in the web.xml which loads the context for you, and controllers are created and/or injected by Spring.

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