Explain the working principle of the Proxy pattern within the Spring Framework and its application in real scenarios.

The Proxy pattern in Spring Framework is implemented by creating proxy objects that wrap real objects and intercept method calls. This allows adding additional behavior (such as logging, transactions, security) without changing the original code.

Spring uses proxies to implement aspect-oriented programming (AOP). For example, when annotating a method with @Transactional, Spring creates a proxy that opens a transaction when the method is called, executes the method, and then commits or rolls back the transaction.

A real-world scenario example: the proxy adds access rights checking or caching to service layer methods without changing business logic.