这是从spring4.0文档里看到一段小备注说的是p: 跟c:一个意思 不知道能不能解决你的问题:这么写较传统的property方式有什么优势?
The p-namespace is not as flexible as the standard XML format. For example, the format for declaring property references clashes with properties that end in Ref, whereas the standard XML format does not. We recommend that you choose your approach carefully and communicate this to your team members, to avoid producing XML documents that use all three approaches at the same time.