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。

Spring supports three types of dependency injection — setter, constructor, and method injection — but overall, the prevailing model is setter injection.

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在使用该方法时，我们必须记住该机制只支持访问器注入，不支持基于构造函数参数的注入。

While using this approach we have to remember that this mechanism supports only accessor-based injection, constructor argument based injection is not supported.

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实现不通过工厂或构造方法获得，而是从注册表里动态查询，或是按需注入。

Implementations are not found via factories or constructors; instead, they are queried dynamically from a registry or injected on demand.

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