Spring supports three types of dependency injection — setter, constructor, and method injection — but overall, the prevailing model is setter injection.
Spring支持三种依赖注入——setter、构造函数和方法注入——但总的来说，最流行的模型是setter注入。
Dependency injection can occur in a variety of ways, for example, via a setter method or a class variable.
依赖性的引入可以以多种方式出现，例如，通过设置属性值的方法或者类变量。
Dependency injection can occur in a variety of ways, such as through a setter method or a class variable.
依赖项注入可以通过多种方式进行，例如通过setter方法或类变量。
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