context: component-scan scan annotations

<context:component-scan base-package="com.matt.cloud"/>

bean-context in

spring.handlers file

http\://www.springframework.org/schema/context=org.springframework.context.config.ContextNamespaceHandler

 

public class ContextNamespaceHandler extends NamespaceHandlerSupport {

    public void init() {
        registerBeanDefinitionParser("property-placeholder", new PropertyPlaceholderBeanDefinitionParser());
        registerBeanDefinitionParser("property-override", new PropertyOverrideBeanDefinitionParser());
        registerBeanDefinitionParser("annotation-config", new AnnotationConfigBeanDefinitionParser());
        registerBeanDefinitionParser("component-scan", new ComponentScanBeanDefinitionParser());
        registerBeanDefinitionParser("load-time-weaver", new LoadTimeWeaverBeanDefinitionParser());
        registerBeanDefinitionParser("spring-configured", new SpringConfiguredBeanDefinitionParser());
        registerBeanDefinitionParser("mbean-export", new MBeanExportBeanDefinitionParser());
        registerBeanDefinitionParser("mbean-server", new MBeanServerBeanDefinitionParser());
    }

}

NamespaceHandlerSupport类

ComponentScanBeanDefinitionParser class scanned for annotations

The class file load path configuration when empty can be arranged to ask the class file is loaded from the jar file

Class way to load files is parsing Class files, but there is no "class loader" classLoad occur

Loaded as ScannedGenericBeanDefinition class