AOP配置类自动注入

        本文主要探究AopAutoConfiguration配置类里面的bean怎么被自动装配的。代码如下：

package com.example.springdemo.demos.a05;

import com.example.springdemo.demos.a04.Bean1;
import com.example.springdemo.demos.a04.Bean2;
import com.example.springdemo.demos.a04.TestAutoConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.aop.AopAutoConfiguration;
import org.springframework.context.annotation.*;
import org.springframework.context.support.GenericApplicationContext;
import org.springframework.core.env.SimpleCommandLinePropertySource;
import org.springframework.core.env.StandardEnvironment;
import org.springframework.core.io.support.SpringFactoriesLoader;
import org.springframework.core.type.AnnotationMetadata;

import java.util.List;

/**
 * @author zhou
 * @version 1.0
 * @description TODO
 * @date 2025/8/17 22:12
 */
public class TestAopAuto {
    public static void main(String[] args) {
        GenericApplicationContext context = new GenericApplicationContext();
        /*StandardEnvironment env = new StandardEnvironment();
        env.getPropertySources().addLast(new SimpleCommandLinePropertySource("--spring.aop.auto=false"));
        context.setEnvironment(env);*/
        AnnotationConfigUtils.registerAnnotationConfigProcessors(context.getDefaultListableBeanFactory());
        context.registerBean(Config.class);
        context.refresh();
        for (String name : context.getBeanDefinitionNames()){
            System.out.println(name);
        }
    }
    @Configuration //本项目配置类
    @Import({MyImportSelector.class})
    static class Config{
    }
    static class MyImportSelector implements DeferredImportSelector {
        @Override
        public String[] selectImports(AnnotationMetadata importingClassMetadata) {
            return new String[]{AopAutoConfiguration.class.getName()};
        }
    }
}

输出结果：

D:\Java2\jdk1.8.0_131\bin\java.exe "-javaagent:D:\idea2\IntelliJ IDEA 2022.3.2\lib\idea_rt.jar=53704:D:\idea2\IntelliJ IDEA 2022.3.2\bin" -Dfile.encoding=UTF-8 -classpath D:\Java2\jdk1.8.0_131\jre\lib\charsets.jar;D:\Java2\jdk1.8.0_131\jre\lib\deploy.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\access-bridge-64.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\cldrdata.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\dnsns.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\jaccess.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\jfxrt.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\localedata.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\nashorn.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\sunec.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\sunjce_provider.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\sunmscapi.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\sunpkcs11.jar;D:\Java2\jdk1.8.0_131\jre\lib\ext\zipfs.jar;D:\Java2\jdk1.8.0_131\jre\lib\javaws.jar;D:\Java2\jdk1.8.0_131\jre\lib\jce.jar;D:\Java2\jdk1.8.0_131\jre\lib\jfr.jar;D:\Java2\jdk1.8.0_131\jre\lib\jfxswt.jar;D:\Java2\jdk1.8.0_131\jre\lib\jsse.jar;D:\Java2\jdk1.8.0_131\jre\lib\management-agent.jar;D:\Java2\jdk1.8.0_131\jre\lib\plugin.jar;D:\Java2\jdk1.8.0_131\jre\lib\resources.jar;D:\Java2\jdk1.8.0_131\jre\lib\rt.jar;D:\javacode\springDemo\target\classes;C:\Users\zhou\.m2\repository\org\springframework\boot\spring-boot-starter-web\2.6.13\spring-boot-starter-web-2.6.13.jar;C:\Users\zhou\.m2\repository\org\springframework\boot\spring-boot-starter\2.6.13\spring-boot-starter-2.6.13.jar;C:\Users\zhou\.m2\repository\org\springframework\boot\spring-boot\2.6.13\spring-boot-2.6.13.jar;C:\Users\zhou\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.6.13\spring-boot-autoconfigure-2.6.13.jar;C:\Users\zhou\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.6.13\spring-boot-starter-logging-2.6.13.jar;C:\Users\zhou\.m2\repository\ch\qos\logback\logback-classic\1.2.11\logback-classic-1.2.11.jar;C:\Users\zhou\.m2\repository\ch\qos\logback\logback-core\1.2.11\logback-core-1.2.11.jar;C:\Users\zhou\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.17.2\log4j-to-slf4j-2.17.2.jar;C:\Users\zhou\.m2\repository\org\apache\logging\log4j\log4j-api\2.17.2\log4j-api-2.17.2.jar;C:\Users\zhou\.m2\repository\org\slf4j\jul-to-slf4j\1.7.36\jul-to-slf4j-1.7.36.jar;C:\Users\zhou\.m2\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\Users\zhou\.m2\repository\org\yaml\snakeyaml\1.29\snakeyaml-1.29.jar;C:\Users\zhou\.m2\repository\org\springframework\boot\spring-boot-starter-json\2.6.13\spring-boot-starter-json-2.6.13.jar;C:\Users\zhou\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.13.4.2\jackson-databind-2.13.4.2.jar;C:\Users\zhou\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.13.4\jackson-annotations-2.13.4.jar;C:\Users\zhou\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.13.4\jackson-core-2.13.4.jar;C:\Users\zhou\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.13.4\jackson-datatype-jdk8-2.13.4.jar;C:\Users\zhou\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.13.4\jackson-datatype-jsr310-2.13.4.jar;C:\Users\zhou\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.13.4\jackson-module-parameter-names-2.13.4.jar;C:\Users\zhou\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\2.6.13\spring-boot-starter-tomcat-2.6.13.jar;C:\Users\zhou\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.68\tomcat-embed-core-9.0.68.jar;C:\Users\zhou\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\9.0.68\tomcat-embed-el-9.0.68.jar;C:\Users\zhou\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.68\tomcat-embed-websocket-9.0.68.jar;C:\Users\zhou\.m2\repository\org\springframework\spring-web\5.3.23\spring-web-5.3.23.jar;C:\Users\zhou\.m2\repository\org\springframework\spring-beans\5.3.23\spring-beans-5.3.23.jar;C:\Users\zhou\.m2\repository\org\springframework\spring-webmvc\5.3.23\spring-webmvc-5.3.23.jar;C:\Users\zhou\.m2\repository\org\springframework\spring-aop\5.3.23\spring-aop-5.3.23.jar;C:\Users\zhou\.m2\repository\org\springframework\spring-context\5.3.23\spring-context-5.3.23.jar;C:\Users\zhou\.m2\repository\org\springframework\spring-expression\5.3.23\spring-expression-5.3.23.jar;C:\Users\zhou\.m2\repository\org\slf4j\slf4j-api\1.7.36\slf4j-api-1.7.36.jar;C:\Users\zhou\.m2\repository\org\springframework\spring-core\5.3.23\spring-core-5.3.23.jar;C:\Users\zhou\.m2\repository\org\springframework\spring-jcl\5.3.23\spring-jcl-5.3.23.jar com.example.springdemo.demos.a05.TestAopAuto
22:35:54.151 [main] DEBUG org.springframework.context.support.GenericApplicationContext - Refreshing org.springframework.context.support.GenericApplicationContext@4361bd48
22:35:54.191 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
22:35:54.438 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerProcessor'
22:35:54.440 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'forceAutoProxyCreatorToUseClassProxying'
22:35:54.442 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
22:35:54.447 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
22:35:54.448 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
22:35:54.452 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.aop.config.internalAutoProxyCreator'
22:35:54.521 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'com.example.springdemo.demos.a05.TestAopAuto$Config'
22:35:54.524 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$ClassProxyingConfiguration'
22:35:54.525 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.boot.autoconfigure.aop.AopAutoConfiguration'
org.springframework.context.annotation.internalConfigurationAnnotationProcessor
org.springframework.context.annotation.internalAutowiredAnnotationProcessor
org.springframework.context.annotation.internalCommonAnnotationProcessor
org.springframework.context.event.internalEventListenerProcessor
org.springframework.context.event.internalEventListenerFactory
com.example.springdemo.demos.a05.TestAopAuto$Config
org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$ClassProxyingConfiguration
forceAutoProxyCreatorToUseClassProxying
org.springframework.boot.autoconfigure.aop.AopAutoConfiguration
org.springframework.aop.config.internalAutoProxyCreator

Process finished with exit code 0

       可以看到，com.example.springdemo.demos.a05.TestAopAuto$Config之下的类都是通过aop自动配置类注入的bean。之上的是通过注入bean工厂后处理器自带的bean。

 进入AopAutoConfiguration类的源码：

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//

package org.springframework.boot.autoconfigure.aop;

import org.aspectj.weaver.Advice;
import org.springframework.aop.config.AopConfigUtils;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@Configuration(
    proxyBeanMethods = false
)
@ConditionalOnProperty(
    prefix = "spring.aop",
    name = {"auto"},
    havingValue = "true",
    matchIfMissing = true
)
public class AopAutoConfiguration {
    public AopAutoConfiguration() {
    }

    @Configuration(
        proxyBeanMethods = false
    )
    @ConditionalOnMissingClass({"org.aspectj.weaver.Advice"})
    @ConditionalOnProperty(
        prefix = "spring.aop",
        name = {"proxy-target-class"},
        havingValue = "true",
        matchIfMissing = true
    )
    static class ClassProxyingConfiguration {
        ClassProxyingConfiguration() {
        }

        @Bean
        static BeanFactoryPostProcessor forceAutoProxyCreatorToUseClassProxying() {
            return (beanFactory) -> {
                if (beanFactory instanceof BeanDefinitionRegistry) {
                    BeanDefinitionRegistry registry = (BeanDefinitionRegistry)beanFactory;
                    AopConfigUtils.registerAutoProxyCreatorIfNecessary(registry);
                    AopConfigUtils.forceAutoProxyCreatorToUseClassProxying(registry);
                }

            };
        }
    }

    @Configuration(
        proxyBeanMethods = false
    )
    @ConditionalOnClass({Advice.class})
    static class AspectJAutoProxyingConfiguration {
        AspectJAutoProxyingConfiguration() {
        }

        @Configuration(
            proxyBeanMethods = false
        )
        @EnableAspectJAutoProxy(
            proxyTargetClass = true
        )
        @ConditionalOnProperty(
            prefix = "spring.aop",
            name = {"proxy-target-class"},
            havingValue = "true",
            matchIfMissing = true
        )
        static class CglibAutoProxyConfiguration {
            CglibAutoProxyConfiguration() {
            }
        }

        @Configuration(
            proxyBeanMethods = false
        )
        @EnableAspectJAutoProxy(
            proxyTargetClass = false
        )
        @ConditionalOnProperty(
            prefix = "spring.aop",
            name = {"proxy-target-class"},
            havingValue = "false"
        )
        static class JdkDynamicAutoProxyConfiguration {
            JdkDynamicAutoProxyConfiguration() {
            }
        }
    }
}

注意看上面的条件

@ConditionalOnProperty(
    prefix = "spring.aop",
    name = {"auto"},
    havingValue = "true",
    matchIfMissing = true
)

只要当下面条件之一成立便可加载AopAutoConfiguration里面的配置的bean

1）配置文件里面有spring.aop开头的属性,名字为auto，值为ture

2）上面配置缺失

现在我们手动在main方法里面把spring.aop.auto设置为false,便不会加载里面的bean

测试结果如下：

跟之前对比少了四个bean。