Spring 注解@Autowired 是如何工作的? [英] How does Spring annotation @Autowired work?

问题描述

我遇到了一个 @Autowired 的例子:

I came across an example of @Autowired:

public class EmpManager {
   @Autowired
   private EmpDao empDao;
}

我很好奇 empDao 如何获取集合，因为没有 setter 方法并且它是私有的.

I was curious about how the empDao get sets since there are no setter methods and it is private.

推荐答案

Java 允许通过 AccessibleObject.setAccessible()method 是反射框架的一部分(Field 和 Method 都继承自 AccessibleObject).一旦该字段可以被发现并写入，剩下的工作就变得很简单了.仅仅是一个简单的编程问题.

Java allows access controls on a field or method to be turned off (yes, there's a security check to pass first) via the AccessibleObject.setAccessible() method which is part of the reflection framework (both Field and Method inherit from AccessibleObject). Once the field can be discovered and written to, it's pretty trivial to do the rest of it; merely a Simple Matter Of Programming.

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