spring aop example

I. Issues to be addressed Some APIs have signature parameters (signature), the passport first verifies the signature, and the validation passes before the implementation method is executed. The first implementation method (Origin): The code that writes the checksum in the interface that requires the signature check, for example:Boolean isValid = Accountservice.validsignature (AppID, signature, client_signature); if (!isvalid) return Errorutil.builderror (errorutil.err_code_com_sing

First, what is AOP? aop技术是面向切面编程思想，作为OOP的延续思想添加到企业开发中，用于弥补OOP开发过程中的缺陷而提出的编程思想。AOP底层也是面向对象；只不过面向的不是普通的Object对象，而是特殊的AOP对象。AOP的关注点是组成系统的非核心通用服务模块（比如登录检查等），相对于普通对象，aop不需要通过继承、方法调用的方式来提供功能，只需要在xml文件中以引用的方式，将非核心服务功能引用给需要改功能的核心业务逻辑对象

parlance, if you need an object somewhere, you don't have to go through new to generate the objects you need, but instead, you will have an object like this through spring's bean factory.AOP is a tangent-oriented programming. For example, every time you do a database operation, a log is generated. If you have many classes of operations on the database,So you have to write about the log in every class. But if you're using

Introduction AOP is the product of the development of software development to a certain stage, the emergence of AOP is not to replace OOP, only as a useful complement to OOP, in the following example, this concept will be verified. AOP applications are limited and generally apply to applications with crosscutting logic

and pointcuts. Now find out, no connection point what things, connection point is to let you understand the pointcut, get out, understand the concept on the line. The notice explains what to do and when to do it (whenThis is known by Before,after,around in the method name, and the pointcut shows where to go (specifying exactly which method), which is a complete definition of the facet.5. Introduction (Introduction)Allows us to add a new method property to an existing class. This is not to use t

An AOP implementation based on agent (proxy)First of all, this is an agent-based implementation approach. The following diagram is a good representation of this relationship:This diagram reflects several key components involved in the AOP process (take @before advice as an example): Caller beans-The calling initiator, which knows only the bean of the tar

interfaces, and such interfaces cannot be introduced (for example, in the case of legacy code). It is based on run-time bytecode generation using the Cglib library. For the object being represented, spring allows the use of static (method matching based on exact name or regular expression, or annotation driven) or dynamic (matching is at run time, including Cflow pointcut type) pointcut definition to assi

Spring is based on the annotation @ AspectJ AOP, spring @ aspectjaop In addition to configuring AOP in XML, Spring also supports annotation: Use the @ AspectJ style aspect declaration. However, the @ AspectJ support needs to be enabled in XML in Annotation mode.An Annotation

AOP is the abbreviation of Aspect oriented programming, which means: face-cutting programming, through the pre-compilation method and run-time dynamic agent implementation of the unified maintenance of the program functions of a technology. AOP is an important part of the spring framework by defining an entry point for an existing program and then cutting into di

package in Testaspect is a Advice. Where a "slice" can contain multiple "Advice", such as Testaspect.pointcut (Pointcut) : An assertion that matches a connection point, a notification in AOP, and a Pointcut expression association. For example, all the notifications in Testaspect are concerned with connection points that are execution by pointcut expressions (* com.spring.service.*.* (..)) to decide.target