spring源码解析 关于注解

类 AbstractRefreshableApplicationContext
//工厂刷新 obtainFreshBeanFactory>refreshBeanFactory>loadBeanDefinitions

类 AbstractXmlApplicationContext
XmlBeanDefinitionReader从xml读取beandefinition loadBeanDefinitions 加载bean定义

//加载bean定义public int loadBeanDefinitions(String... locations) throws BeanDefinitionStoreException {Assert.notNull(locations, "Location array must not be null");int counter = 0;for (String location : locations) {counter += loadBeanDefinitions(location);}return counter;}

BeanDefinitionParserDelegate#bean定义的解析器

//格式化非默认的元素public BeanDefinition parseCustomElement(Element ele, BeanDefinition containingBd) {String namespaceUri = getNamespaceURI(ele);//spring.handler读取该element的解析器NamespaceHandler handler = this.readerContext.getNamespaceHandlerResolver().resolve(namespaceUri);if (handler == null) {error("Unable to locate Spring NamespaceHandler for XML schema namespace [" + namespaceUri + "]", ele);return null;}return handler.parse(ele, new ParserContext(this.readerContext, this, containingBd));}

META-INFO下的spring.handler

NamespaceHandlerResolver using mappings {http://www.w3.org/ns/ws-policy=org.apache.cxf.ws.policy.spring.PolicyNamespaceHandler, http://www.springframework.org/schema/jdbc=org.springframework.jdbc.config.JdbcNamespaceHandler, http://www.springframework.org/schema/oxm=org.springframework.oxm.config.OxmNamespaceHandler, http://cxf.apache.org/jaxws=org.apache.cxf.jaxws.spring.NamespaceHandler, http://schemas.xmlsoap.org/ws/2004/09/policy=org.apache.cxf.ws.policy.spring.PolicyNamespaceHandler, http://cxf.apache.org/core=org.apache.cxf.bus.spring.NamespaceHandler, http://www.springframework.org/schema/c=org.springframework.beans.factory.xml.SimpleConstructorNamespaceHandler, http://www.springframework.org/schema/aop=org.springframework.aop.config.AopNamespaceHandler, http://www.springframework.org/schema/mvc=org.springframework.web.servlet.config.MvcNamespaceHandler, http://www.springframework.org/schema/util=org.springframework.beans.factory.xml.UtilNamespaceHandler, http://www.w3.org/2006/07/ws-policy=org.apache.cxf.ws.policy.spring.PolicyNamespaceHandler, http://cxf.apache.org/simple=org.apache.cxf.frontend.spring.NamespaceHandler, http://cxf.apache.org/policy=org.apache.cxf.ws.policy.spring.NamespaceHandler, http://mybatis.org/schema/mybatis-spring=org.mybatis.spring.config.NamespaceHandler, http://www.springframework.org/schema/p=org.springframework.beans.factory.xml.SimplePropertyNamespaceHandler, http://www.springframework.org/schema/tx=org.springframework.transaction.config.TxNamespaceHandler, http://cxf.apache.org/bindings/soap=org.apache.cxf.binding.soap.spring.NamespaceHandler, http://cxf.apache.org/transports/http/configuration=org.apache.cxf.transport.http.spring.NamespaceHandler, http://www.springframework.org/schema/cache=org.springframework.cache.config.CacheNamespaceHandler, http://www.springframework.org/schema/lang=org.springframework.scripting.config.LangNamespaceHandler, http://www.springframework.org/schema/task=org.springframework.scheduling.config.TaskNamespaceHandler, http://www.springframework.org/schema/web-services=org.springframework.ws.config.WebServicesNamespaceHandler, http://www.springframework.org/schema/context=org.springframework.context.config.ContextNamespaceHandler, http://cxf.apache.org/ws/addressing=org.apache.cxf.ws.addressing.spring.NamespaceHandler, http://www.springframework.org/schema/jee=org.springframework.ejb.config.JeeNamespaceHandler}

//本例子以ContextNamespaceHandler为例子 获取解析器

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());}}

//刷新定义的注解
ClassPathScanningCandidateComponentProvider
扫描注解Set doScan(String… basePackages) 获取所有注解的bean

spring的bean都放在beanDefinitionMap
spring的names放在beanDefinitionNames