据我所理解,如果给豆类给“原型”范围=“原型”一个范围,那么该类的一个新实例会根据每一个请求而创建。那么为什么有人会用春天来创建一个新对象而不是简单地写入
ClassName newBean = new ClassName();
我只用春天来创造单子
因为您可能想要在原型中注入其他豆子。 或者您可能想要将 AOP 方面应用到这个豆子的方法中。 或者您可能想要让它交易。 或者安全。
如果你只是援引班级的建造者, 它不再是由春天管理的豆子了, 斯普林用豆子做的一切 都不是对人工建造的物体做的。
我所知道的一个例子是当春天被用作 strutts2 的物件工具时。 要为每个 http 请求创建一个新的 Action 对象 。
CMOE = "修改的切口,开放的扩展。"
如果对类有任何行为变化Name,那么您可以扩展类Name,并在配置中提供新类的对象。
这不需要修改任何代码。
这是简单的原因之一。JB Nizet所说的话更能描述和深入。
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