极大地减少用于数据转换和异常处理的繁琐代码，从而专注于核心业务逻辑。

Significant reduction of tedious code for data conversion and exception handling, allowing you to focus on core business logic.

youdao

首先，因为注解存在于切面中，而不是核心业务逻辑，所以转换的成本并不高。

Firstly, as the annotations are in the aspects, not core business logic, the cost of switching isn't high.

youdao

调用处理程序类还会把方法调用委托到真正的实现类，以便处理核心业务逻辑。

The invocation handler class will also delegate method calls to a real implementation class in order to process the core business logic.

youdao