spring configuration based AOP xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--配置spring的ioc，把service对象配置进来-->
    <bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"></bean>

    <!--spring configured based AOP xml of         2. aop: config configuration label indicates the beginning of AOP
        1. notification Bean also managed to spring

        3. aop: aspect tag indicates that the configuration section 
            id attribute: section is to provide a unique identifier 
            ref attribute: Specifies a notification bean class id 
        4. In aop: configuring corresponding tag type of the notification using the internal aspect tag 
            we let pringLog example is performed before the implementation of an entry point, so is the pre-notification 
            aop: before the pre-notification shows an arrangement 
                method attribute: used to specify the Logger class method is that before advice 
                pointcut attribute: used to specify the starting point expression style, the meaning of the expression refers to what methods to enhance the business layer 

                pointcut expressions wording: 
                keywords: execution (expression) 
                expression: 
                    access modifier, return values, the package name registration .. package name. . the class name. method name (parameter list) 
                expression standard formula is written 
                    public void com.itheima.service.impl.AccountServiceImpl.saveAccount () 
                    access modifier can be omitted
                        void com.itheima.service.impl.AccountServiceImpl.saveAccount () 
                    Return Value can use wildcards, represent any return value 
                        * com.itheima.service.impl.AccountServiceImpl.saveAccount () 
                    package name can use wildcards, refers to any packet, but pack a few levels, it is necessary to write a few *. 
                        * *. *. *. *. AccountServiceImpl.saveAccount () 
                    package name can be used .. represent the current package and its subpackages 
                        * * .. AccountServiceImpl.saveAccount () 
                    class name and method names can be used to implement the wildcard * 
                        * * .. * * () method only wildcard parameter-free method parameters. 
                    parameter list: 
                        you can write directly to the data type 
                            . the basic types of direct write name int * * .. * * ( int)
                            Reference types write the package name. The name of the class method java.long.String * * .. *. * ( Java.long.String) 
                        using wildcard represents any type, but there must be parameters * * .. *. * (*) 
                        Use .. parameters can indicate whether there can be any type of parameter * * .. *. * (..) 

                all pass with the wording 
                    * * .. *. * (..) 

                the actual development of the expression is usually the starting point writing: 
                    cut method in all business layer implementation class 
                        * * * com.itheima.service.impl (..).. 
         -> 

    <- configuration class Logger ->! 
    <the bean ID = "Logger" class = "com.itheima.utils.Logger"> </ the bean> 

    ! <- configuration AOP -> 
    <AOP: config> 
        <- configuration cut ->! 
        <AOP: Aspect ID = "logAdvice" REF = "Logger "> 
            <!- type configuration and associated notification of the notification method and the starting point of the method ->
            <aop:before method="printLog" pointcut="execution(* *..*.*(..))"></aop:before>
        </aop:aspect>
    </aop:config>
</beans>