{"id":1540,"date":"2024-09-15T10:08:22","date_gmt":"2024-09-15T02:08:22","guid":{"rendered":"http:\/\/www.spiceandwolf.com.cn\/?p=1540"},"modified":"2026-04-23T14:05:30","modified_gmt":"2026-04-23T06:05:30","slug":"bean-life-circle","status":"publish","type":"post","link":"http:\/\/www.spiceandwolf.com.cn\/index.php\/bean-life-circle\/","title":{"rendered":"Bean\u7684\u751f\u547d\u5468\u671f"},"content":{"rendered":"\n

\u4eceRun\u65b9\u6cd5\u5f00\u59cb\u5b9a\u4f4dbean\u751f\u547d\u5468\u671f\u7684\u5b9e\u73b0\u65b9\u6cd5<\/h3>\n\n\n\n

\u4ecerun\u65b9\u6cd5\u5f00\u59cb\uff0c\u9010\u6b65\u89e3\u6790\u5b9a\u4f4d\u5230bean\u751f\u547d\u5468\u671f\u903b\u8f91\uff1a<\/p>\n\n\n\n

\u9996\u5148\u8fd9\u662f\u6211\u4eec\u7684\u4e3b\u542f\u52a8\u7c7b\u5165\u53e3\uff1a<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
        SpringApplicationRunListeners listeners = this.getRunListeners(args);\n        listeners.starting();<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\u4e3b\u8981\u7528\u4e8e\u542f\u52a8spring\u7684\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u7528\u4e8e\u76d1\u542c\u5bb9\u5668\u5404\u4e2a\u751f\u547d\u5468\u671f\u7684\u5404\u4e2a\u4e8b\u4ef6<\/p>\n\n\n\n
context = this.createApplicationContext();<\/code><\/pre>\n\n\n\n
\u521b\u5efaspring\u5bb9\u5668\u7c7b<\/p>\n\n\n\n
this.prepareContext(context, environment, listeners, applicationArguments, printedBanner);<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u52a0\u8f7d\u5404\u79cdBeanDefinitionLoader\uff0cBeanDefinitionLoader\u4e2d\u5305\u62ecAnnotatedBeanDefinitionReader\u3001XmlBeanDefinitionReader\u3001ClassPathBeanDefinitionScanner\u3001BeanDefinitionReader\u7b49\u57fa\u4e8e\u901a\u8fc7\u4e0d\u540c\u65b9\u5f0f\u5f15\u5165bean\u7684\u8bfb\u53d6\u5668<\/p>\n\n\n\n
\u7136\u540eprepareContext\u65b9\u6cd5\u57fa\u672c\u5c31\u8d70\u5b8c\u4e86\uff0c\u540e\u9762\u4f1a\u6267\u884crefreshContext\u65b9\u6cd5<\/p>\n\n\n\n
this.refreshContext(context);<\/code><\/pre>\n\n\n\n
\u6211\u4eec\u76f4\u63a5\u5f80\u91cc\u5b9a\u4f4d\u5230\u6700\u91cc\u5c42\u7684refresh()\u65b9\u6cd5\uff0c\u5b83\u7684\u4e09\u4e2a\u5b9e\u73b0\u7c7b\u90fd\u4f1a\u8d70AbstractApplicationContext\u4e2d\u540c\u6b65\u4ee3\u7801\u5757\u7684\u903b\u8f91\uff0c\u8fd9\u91cc\u9762\u5c31\u5305\u62ec\u4e86bean\u7684\u751f\u547d\u5468\u671f<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u5728bean\u7684\u751f\u547d\u5468\u671f\u4e4b\u524d\uff0c\u6709\u51e0\u6b65\u51c6\u5907\u5de5\u4f5c\uff1a<\/p>\n\n\n\n
    \n
  1. \u76d1\u542c\u5668<\/li>\n\n\n\n
  2. \u521b\u5efabeanFactory<\/li>\n\n\n\n
  3. \u521d\u59cb\u5316beanFacotry<\/li>\n<\/ol>\n\n\n\n
    \u5176\u4e2d\u5728\u521b\u5efabeanFacotry\u65f6\u4f1a\u5c06\u52a0\u8f7dbeanDefinition\u4e3a\u540e\u9762bean\u7684\u751f\u547d\u5468\u671f\u505a\u51c6\u5907\uff1a<\/p>\n\n\n\n
    ConfigurableListableBeanFactory beanFactory = this.obtainFreshBeanFactory();<\/code><\/pre>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u7ee7\u7eed\u5728refreshBeanFactory\u4e2d\u5b9a\u4f4dbeanDefinitions\u7684\u5904\u7406\u903b\u8f91\uff1a<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    loadBeanDefinitions()\u51fd\u6570\u4f1a\u57fa\u4e8e\u5bf9\u5e94\u7684reader\u52a0\u8f7d\u6240\u6709\u7684beanDefinition\uff0c\u8fd9\u91cc\u6211\u4eec\u770bloadBeanDefinitions\u7684\u5176\u4e2d\u4e00\u4e2a\u5b9e\u73b0\u7c7bAbstractXmlApplicationContext\u4e2d\u7684loadBeanDefinitions<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u5411\u7ee7\u7eed\u770b\u66f4\u6df1\u7684\u5b9e\u73b0\u903b\u8f91<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u8fd9\u91cc\u770bPropertiesBeanDefinitionReader\u7684loadBeanDefinitions(Resource resource)\u7684\u65b9\u6cd5\u5b9e\u73b0<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u7ee7\u7eed\u5f80\u4e0b\uff0c\u4e3b\u8981\u770b\u770bBeanDefinition\u7684\u751f\u6210\u903b\u8f91\uff0c\u8fd9\u91ccprops\u662f\u4e00\u4e2abean name\u4e0e\u7c7b\u5168\u9650\u5b9a\u540d\u7684map<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u6700\u540e\u5b9a\u4f4d\u5230registerBeanDefinition\u65b9\u6cd5<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u770b\u5230createBeanDefinition\u65b9\u6cd5\u7684\u5904\u7406\u903b\u8f91<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
     \u5982\u679cclassLoader\u4e0d\u4e3a\u7a7a\uff0c\u4f1a\u7ed9beanDefinition\u7684BeanClass\u8d4b\u503c\u5bf9\u5e94\u7684class\uff0c\u5176\u5b9e\u5c31\u662f\u62ff\u5230beanDefinition\u7684Class\uff1b\u5982\u679c\u4e3a\u7a7a\u5219\u7ed9BeanClassName\u8d4b\u503c<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u800c\u8fd9\u91cc\u6ce8\u518c\u5668\u7684\u4f5c\u7528\u5c31\u662f\u5b58\u653e\u4e00\u4e2amap\uff0c\u7528\u4e8e\u5b58\u653ebeanDefinition\u7684map<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u770b\u5176\u4e2d\u4e00\u4e2a\u5b9e\u73b0\u7c7b\u7684\u4ee3\u7801<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    registerBeanDefinition\u672c\u8eab\u4e5f\u53ea\u662f\u5728map\u4e2d\u5b58\u50a8\u4e00\u4e2aBeanName-BeanDefinition\u7684\u952e\u503c\u5bf9<\/p>\n\n\n\n
    beanDefinition\u5904\u7406\u5b8c\u6210\u540e\uff0c\u5c31\u8fdb\u5165bean\u751f\u547d\u5468\u671f\u903b\u8f91\u4e2d\u4e86<\/p>\n\n\n\n
    \u7136\u540e\u7ee7\u7eed\u5411\u4e0b\u5b9a\u4f4dbean\u7684\u751f\u547d\u5468\u671f\u4ee3\u7801\u903b\u8f91\uff1a<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    doGetBean\u4e2d\u4f1a\u8c03\u7528createBean\u65b9\u6cd5<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    createBean\u4e2d\u53c8\u4f1a\u8c03\u7528doCreateBean\uff0cdoCreateBean\u65b9\u6cd5\u4e2d\u5305\u542b\u4e86bean\u751f\u547d\u5468\u671f\u7684\u51e0\u4e4e\u6240\u6709\u9636\u6bb5<\/p>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    bean\u751f\u547d\u5468\u671f\u89e3\u6790<\/h3>\n\n\n\n
    \u524d\u8a00<\/h4>\n\n\n\n
    \u9996\u5148spring\u5bb9\u5668\u5728\u83b7\u53d6bean\u65f6\u4f1a\u8c03\u7528getBean(beanName)\u65b9\u6cd5\uff08\u6216\u540c\u540d\u91cd\u8f7d\u65b9\u6cd5\uff09\uff0cgetBean()\u6240\u6709\u91cd\u8f7d\u90fd\u662f\u57fa\u4e8edoGetBean()\u65b9\u6cd5\u5b9e\u73b0\u7684\u3002<\/p>\n\n\n\n
        \/\/ AbstractBeanFactory.class\n    \n    protected <T> T doGetBean(String name, @Nullable Class<T> requiredType, @Nullable Object[] args, boolean typeCheckOnly) throws BeansException {\n        String beanName = this.transformedBeanName(name);\n        Object sharedInstance = this.getSingleton(beanName);\n        Object bean;\n        if (sharedInstance != null && args == null) {\n            ...\n            bean = this.getObjectForBeanInstance(sharedInstance, name, beanName, (RootBeanDefinition)null);\n        } else {\n            ...\n\n            try {\n                RootBeanDefinition mbd = this.getMergedLocalBeanDefinition(beanName);\n                ...\n\n                \/\/ \u5224\u65ad\u662f\u5426\u662f\u5355\u4f8b\n                if (mbd.isSingleton()) {\n                    \/\/ \u83b7\u53d6\u5355\u4f8b\n                    sharedInstance = this.getSingleton(beanName, () -> {\n                        try {\n                            return this.createBean(beanName, mbd, args);\n                        } catch (BeansException var5) {\n                            this.destroySingleton(beanName);\n                            throw var5;\n                        }\n                    });\n                    bean = this.getObjectForBeanInstance(sharedInstance, name, beanName, mbd);\n                } else if (mbd.isPrototype()) {\n                    ...\n                } else {\n                    ...\n                }\n            } catch (BeansException var26) {\n                this.cleanupAfterBeanCreationFailure(beanName);\n                throw var26;\n            }\n        }\n\n        if (requiredType != null && !requiredType.isInstance(bean)) {\n            ...\n        } else {\n            return bean;\n        }\n    }<\/code><\/pre>\n\n\n\n
    \u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u4f1a\u6839\u636e\u4e09\u7ea7\u7f13\u5b58\u673a\u5236<\/a>\u62ff\u5230\u7f13\u5b58\u7684bean\uff0c\u5982\u679c\u90fd\u6ca1\u6709\u5219\u4f1a\u6267\u884cbean\u7684\u521b\u5efa\u6d41\u7a0b\uff0c\u5373\u6267\u884ccreateBean()\u65b9\u6cd5\uff0ccreateBean()\u7684\u6838\u5fc3\u903b\u8f91\u90fd\u5728doCreateBean()\u65b9\u6cd5\u4e2d\uff0c\u6240\u4ee5\u6211\u4eec\u60f3\u8981\u4e86\u89e3bean\u7684\u751f\u547d\u5468\u671f\u9700\u8981\u96c6\u4e2d\u5b66\u4e60\u8fd9\u4e2a\u4ee3\u7801\u7684\u6267\u884c\u903b\u8f91\u3002<\/p>\n\n\n\n
        \/\/ AbstractAutowireCapableBeanFactory.class\n\n    protected Object doCreateBean(String beanName, RootBeanDefinition mbd, @Nullable Object[] args) throws BeanCreationException {\n        BeanWrapper instanceWrapper = null;\n        if (mbd.isSingleton()) {\n            instanceWrapper = (BeanWrapper)this.factoryBeanInstanceCache.remove(beanName);\n        }\n\n        \/\/ \u5b9e\u4f8b\u5316\n        if (instanceWrapper == null) {\n            instanceWrapper = this.createBeanInstance(beanName, mbd, args);\n        }\n\n        Object bean = instanceWrapper.getWrappedInstance();\n        ...\n\n        \/\/ \u5224\u65ad\u662f\u5426\u662f\u6b63\u5728\u521b\u5efa\u7684\u5355\u4f8bBean\n        boolean earlySingletonExposure = mbd.isSingleton() && this.allowCircularReferences && this.isSingletonCurrentlyInCreation(beanName);\n        if (earlySingletonExposure) {\n            ...\n\n            \/\/ \u6dfb\u52a0\u5230\u4e09\u7ea7\u7f13\u5b58\n            this.addSingletonFactory(beanName, () -> {\n                return this.getEarlyBeanReference(beanName, mbd, bean);\n            });\n        }\n\n        Object exposedObject = bean;\n\n        try {\n            \/\/ \u5c5e\u6027\u8d4b\u503c\n            this.populateBean(beanName, mbd, instanceWrapper);\n            \/\/ \u521d\u59cb\u5316\n            exposedObject = this.initializeBean(beanName, exposedObject, mbd);\n        } catch (Throwable var18) {\n            if (var18 instanceof BeanCreationException && beanName.equals(((BeanCreationException)var18).getBeanName())) {\n                throw (BeanCreationException)var18;\n            }\n\n            throw new BeanCreationException(mbd.getResourceDescription(), beanName, \"Initialization of bean failed\", var18);\n        }\n\n        ...\n    }<\/code><\/pre>\n\n\n\n
    bean\u7684\u751f\u547d\u5468\u671f\u4e2d\u7684\u524d\u4e09\u4e2a\u9636\u6bb5\u5728doCreateBean()\u4e2d\u90fd\u80fd\u5b9a\u4f4d\u5230\u5bf9\u5e94\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
      \n
    • \u5b9e\u4f8b\u5316\uff08this.createBeanInstance(beanName, mbd, args)\uff09<\/li>\n\n\n\n
    • \u5c5e\u6027\u8d4b\u503c\uff08this.populateBean(beanName, mbd, instanceWrapper)\uff09<\/li>\n\n\n\n
    • \u521d\u59cb\u5316\uff08this.initializeBean(beanName, exposedObject, mbd)\uff09<\/li>\n<\/ul>\n\n\n\n
      \u5b9e\u4f8b\u5316<\/h4>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \u4f20\u5165\u7684\u53c2\u6570\u6709\u4e09\u4e2a\uff0c\u7b2c\u4e00\u4e2abeanName\u6ca1\u4ec0\u4e48\u597d\u8bf4\u7684\uff0c\u7b2c\u4e8c\u4e2a\u662fbeanDefinition\uff0c\u7b2c\u4e09\u4e2a\u662f\u5176\u4ed6\u53c2\u6570\uff0c\u8fd9\u91cc\u6211\u4eec\u5f80\u56de\u8ffd\u4e00\u4e0bbeanDefinition\u662f\u4ece\u54ea\u91cc\u53d6\u7684<\/p>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \u8fd9\u91cc\u9996\u5148\u4f1a\u4eceAbstractBeanFactory\u7c7b\u7684mergedBeanDefinitons\u8fd9\u4e2amap\u4e2d\u53d6<\/p>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \u5982\u679c\u53bb\u4e0d\u5230\u5219\u4f1a\u8fd4\u56dethis.getMergedBeanDefinition(beanName, this.getBeanDefinition(beanName))\u7684\u8fd4\u56de\u503c\uff0c\u5176\u4e2dthis.getBeanDefinition(beanName)\u83b7\u53d6\u5230\u7684beanDefinition\u5bf9\u8c61\u5176\u5b9e\u662f\u4ecebeanDefinitionMap\u4e2d\u53d6\u7684\uff0c\u8fd9\u5c31\u8ddf\u4e4b\u524dbeanDefinition\u7684\u521b\u5efa\u548c\u6ce8\u518c\u5bf9\u4e0a\u4e86<\/p>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \u5f53\u524d\u7c7b\u4e5f\u7684\u786e\u662fBeanDefinitionRegistry\u7684\u5b9e\u73b0\u7c7b\u4e4b\u4e00<\/p>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \u7136\u540egetMergedBeanDefinition\u65b9\u6cd5\u5b9e\u73b0\u4e2d\u8fd4\u56de\u7684\u65b9\u6cd5\u5b9e\u4f8b\u4e5f\u662f\u57fa\u4e8egetBeanDefinition\u8fd4\u56de\u5bf9\u8c61\u8fdb\u884c\u91cd\u8f7d\u7684<\/p>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \u5c5e\u6027\u8d4b\u503c<\/h4>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \u5c5e\u6027\u8d4b\u503c\u7684\u53c2\u6570\u6709\u4e09\uff1abeanName\u3001beanDefinition\u548cinstanceWrapper\uff08\u521a\u521b\u5efa\u7684bean\u5b9e\u4f8b\u5bf9\u8c61\uff09<\/p>\n\n\n\n
      \u521d\u59cb\u5316<\/h4>\n\n\n\n
          \/\/ AbstractAutowireCapableBeanFactory.class\n\n    protected Object initializeBean(String beanName, Object bean, @Nullable RootBeanDefinition mbd) {\n        if (System.getSecurityManager() != null) {\n            AccessController.doPrivileged(() -> {\n                this.invokeAwareMethods(beanName, bean);\n                return null;\n            }, this.getAccessControlContext());\n        } else {\n            this.invokeAwareMethods(beanName, bean);\n        }\n\n        Object wrappedBean = bean;\n        \/\/ \u521d\u59cb\u5316\u524d\u6269\u5c55\n        if (mbd == null || !mbd.isSynthetic()) {\n            wrappedBean = this.applyBeanPostProcessorsBeforeInitialization(bean, beanName);\n        }\n\n        \/\/ \u521d\u59cb\u5316\n        try {\n            this.invokeInitMethods(beanName, wrappedBean, mbd);\n        } catch (Throwable var6) {\n            throw new BeanCreationException(mbd != null ? mbd.getResourceDescription() : null, beanName, \"Invocation of init method failed\", var6);\n        }\n\n        \/\/ \u521d\u59cb\u5316\u540e\u6269\u5c55\n        if (mbd == null || !mbd.isSynthetic()) {\n            wrappedBean = this.applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName);\n        }\n\n        return wrappedBean;\n    }<\/code><\/pre>\n\n\n\n
      \u8fd9\u91cc\u6709\u56db\u4e2a\u6269\u5c55\u70b9\uff1a<\/p>\n\n\n\n
        \n
      • xxxAware\u3002<\/li>\n\n\n\n
      • \u521d\u59cb\u5316\u524d\u3002this.applyBeanPostProcessorsBeforeInitialization(bean, beanName)\u3002<\/li>\n\n\n\n
      • \u521d\u59cb\u5316\u3002afterPropertiesSet()\u3002<\/li>\n\n\n\n
      • \u521d\u59cb\u5316\u540e\u3002this.applyBeanPostProcessorsAfterInitialization(wrappedBean, beanName)\u3002\u4f1a\u6267\u884cAOP\u52a8\u6001\u4ee3\u7406\u64cd\u4f5c\u5e76\u8fd4\u56de\u52a8\u6001\u4ee3\u7406\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n
        <\/p>\n","protected":false},"excerpt":{"rendered":"
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