AOP的几个术语

从网上搜罗来的AOP的几个术语：
　　方面（Aspect）： 一个关注点的模块化，这个关注点实现可能另外横切多个对象。事务管理是J2EE应用中一个很好的横切关注点例子。方面用Spring的 Advisor或拦截器实现。

　　连接点（Joinpoint）: 程序执行过程中明确的点，如方法的调 用或特定的异常被抛出。

　　通知（Advice）: 在特定的连接点，AOP框架执行的动作。各种类 型的通知包括“around”、“before”和“throws”通知。通知类型将在下面讨论。许多AOP框架 包括Spring都是以拦截器做通知模型，维护一个“围绕”连接点的拦截器链。

　　切入点（Pointcut）: 指定一个通知将被引发的一系列连接点 的集合。AOP框架必须允许开发者指定切入点：例如，使用正则表达式。

　　引入（Introduction）: 添加方法或字段到被通知的类。 Spring允许引入新的接口到任何被通知的对象。例如，你可以使用一个引入使任何对象实现 IsModified接口，来简化缓存。

　　目标对象（Target Object）: 包含连接点的对象。也被称作 被通知或被代理对象。

　　AOP代理（AOP Proxy）: AOP框架创建的对象，包含通知。 在Spring中，AOP代理可以是JDK动态代理或者CGLIB代理。

　　织入（Weaving）: 组装方面来创建一个被通知对象。这可以在编译时 完成（例如使用AspectJ编译器），也可以在运行时完成。Spring和其他纯Java AOP框架一样， 在运行时完成织入。

下边是以前的老会员femto找的英文资料，也贴出来
• Aspect: A modularization of a concern for which the implementation might otherwise cut across multiple objects. Transaction management is a good example of a crosscutting concern in J2EE applications. Aspects are implemented using Spring as Advisors or interceptors.

• Joinpoint: Point during the execution of a program, such as a method invocation or a particular exception being thrown.

• Advice: Action taken by the AOP framework at a particular joinpoint. Different types of advice include "around," "before" and "throws" advice. Advice types are discussed below. Many AOP frameworks, including Spring, model an advice as an interceptor, maintaining a chain of interceptors "around" the joinpoint.

• Pointcut: A set of joinpoints specifying when an advice should fire. An AOP framework must allow developers to specify pointcuts: for example, using regular expressions.

• Introduction: Adding methods or fields to an advised class. Spring allows you to introduce new interfaces to any advised object. For example, you could use an introduction to make any object implement an IsModified interface, to simplify caching.

• Target object: Object containing the joinpoint. Also referred to as advised or proxied object.

• AOP proxy: Object created by the AOP framework, including advice. In Spring, an AOP proxy will be a JDK dynamic proxy or a CGLIB proxy.

• Weaving: Assembling aspects to create an advised object. This can be done at compile time (using the AspectJ compiler, for example), or at runtime. Spring, like other pure Java AOP frameworks, performs
weaving at runtime.