Spring 第一 随笔集

Posted 2022-08-24 lcj12121

一：spring的配置文件，即XML文件不需要必须写，也可以通过配置文件类进行相关配置

   基于注解的SpringAop,虽然都使用注解在代码类中进行配置，但是它的ApplicationContext.xml还是会用到下面这两个配置

                         <context:component-scan base-package="com.abc.test8.myThree"></context:component-scan>
                         <aop:aspectj-autoproxy/>

 而基于XML配置的SpringAop,则全部都是在ApplicationContext.xml中进行配置

而基于配置文件类，则都在类中配置，不需要XML文件

 

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@Configuration
@ComponentScan("com")//等同于<context:component-scan base-package="com.abc.test8.myThree"></context:component-scan>
@EnableAspectJAutoProxy//等同于 <aop:aspectj-autoproxy/>
public class AppConfig 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

想做高级开发，这些都要去研究

    阅读 SpringAop 文档
    @execution: For matching method execution join points. This is the primary pointcut designator to use when working with Spring AOP.

    @within: Limits matching to join points within certain types (the execution of a method declared within a matching type when using Spring AOP).

    @this: Limits matching to join points (the execution of methods when using Spring AOP) where the bean reference (Spring AOP proxy) is an instance of the given type.

    @target: Limits matching to join points (the execution of methods when using Spring AOP) where the target object (application object being proxied) is an instance of the given type.

    @args: Limits matching to join points (the execution of methods when using Spring AOP) where the arguments are instances of the given types.

    @target: Limits matching to join points (the execution of methods when using Spring AOP) where the class of the executing object has an annotation of the given type.

    @args: Limits matching to join points (the execution of methods when using Spring AOP) where the runtime type of the actual arguments passed have annotations of the given types.

    @within: Limits matching to join points within types that have the given annotation (the execution of methods declared in types with the given annotation when using Spring AOP).

    @annotation: Limits matching to join points where the subject of the join point (the method being executed in Spring AOP) has the given annotation.