\u5b83\u7684\u5b9e\u73b0\u662f\u5c01\u88c5\u4e86\u4e00\u4e2aSpringApplication\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528run\u65b9\u6cd5\u7684\u91cd\u8f7d\uff1a \u8fd9\u4e2arun\u65b9\u6cd5\u7684\u6838\u5fc3\u4ee3\u7801\u662f\u5e72\u4e86\u8fd9\u6837\u51e0\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n \u8fd9\u91cc\u8fc7\u4e00\u4e0b\u5176\u4e2d\u7684\u6838\u5fc3\u6b65\u9aa4\u3002<\/p>\n\n\n\n SpringApplication\u7684\u751f\u547d\u5468\u671f\u3002<\/p>\n\n\n\n \u5b9e\u9645\u4e0aSpringboot\u4e2d\u7528\u5230\u7684Listener\u9ed8\u8ba4\u53ea\u6709 getRunListeners\u8fd4\u56de\u7684\u662f\u4e00\u4e2a \u8fd9\u91cc\u60f3\u8981\u83b7\u53d6\u7684\u76d1\u542c\u5668\u662fSpringApplicationRunListener.class\u7c7b\u578b\u7684\u76d1\u542c\u5668\uff0c\u770b\u5f97\u51fa\u6765\u5c31\u662f\u5bf9SpringApplication\u6574\u4e2a\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u7684\u76d1\u542c\u5668\u3002<\/p>\n\n\n\n \u8fd9\u91cc\u8c03\u7528\u4e86 \u8fd9\u4e2a\u662fSpringboot\u83b7\u53d6bean\u7684\u4e00\u4e2a\u91cd\u8981\u65b9\u6cd5\uff1a<\/p>\n\n\n\n \u8fd9\u91cc\u5c31\u662f\u4eceMETA-INF\/spring.factories<\/strong>\u4e2d\u8bfb\u53d6Key\u4e3aorg.springframework.boot.SpringApplicationRunListener<\/strong>\u7684Values\uff1a<\/p>\n\n\n\n \u6240\u4ee5\u83b7\u53d6\u7684 \u8fd9\u91cc\u53c8\u51fa\u73b0\u4e86\u4e00\u4e2a\u95ee\u9898\uff1a\u6211\u4eec\u8fd9\u4e2a\u5982\u4ee5maven\u6784\u5efa\u7684\u9879\u76ee\u76ee\u5f55\u4e2d\u5e76\u6ca1\u6709\u663e\u5f0f\u51fa\u73b0META-INF\u8fd9\u4e2a\u76ee\u5f55\uff0c\u54ea\u8fd9\u4e2a \u5176\u5b9e\uff0c\u5728pom.xml\u5728\u5f15\u5165\u7684<\/p>\n\n\n\n \u4f9d\u8d56\u7ec4\u4e2d\uff0c\u5305\u542b\u4e86\u4e00\u9879\u540d\u4e3a \u8fd9\u4e2ajar\u5305\u4e2d\u5c31\u5305\u542b\u4e86Springboot\u542f\u52a8\u6240\u9700\u7684 \u8981\u4e86\u89e3\u4e00\u4e2a\u903b\u8f91\u590d\u6742\u7684\u7c7b\u5c31\u5148\u53bb\u4e86\u89e3\u5b83\u7684\u63a5\u53e3\uff1a<\/p>\n\n\n\n \u5148\u6765\u770b\u770bSpringBoot\u542f\u52a8\u65f6\u7b2c\u4e00\u4e2a\u542f\u52a8\u4e8b\u4ef6listeners.starting()\uff1a<\/p>\n\n\n\n \u8c03\u7528\u5c01\u88c5\u597d\u7684 \u8ddf\u8fdbSimpleApplicationEventMulticaster\uff1a<\/p>\n\n\n\n \u8fd9\u4e2a \u8fd9\u91cc\u5c31\u6709\u5982\u4e0b4\u79cd\u76d1\u542c\u5668\uff1a<\/p>\n\n\n\n \u4ee5\u65e5\u5fd7\u76d1\u542c\u5668\uff1aLoggingApplicationListener\u4e3a\u4f8b\uff1a<\/p>\n\n\n\n \u8fd9\u5c31\u662f\u63d0\u5230\u7684\u652f\u6301\u7684source\u548ctype\uff1a<\/p>\n\n\n\n \u8fd9\u662f\u5176\u6700\u540e\u8c03\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n \u8fd9\u4e2a\u7c7b\u5c31\u662f\u5728springboot\u542f\u52a8\u65f6\u65e5\u5fd7\u8f93\u51fa\u7684\u5b9e\u73b0\u7c7b\u3002<\/p>\n\n\n\n \u81f3\u6b64<\/p>\n\n\n\n \u8fd9\u4e24\u4e32\u5c31\u4ecb\u7ecd\u5b8c\u4e86\u3002\u8fd9\u4e2aEventPublishingRunListener\u4f1a\u8d2f\u7a7f\u5728SpringApplication\u6574\u4e2a\u8fd0\u884c\u8fc7\u7a0b\u3002<\/p>\n\n\n\n SpringApplication\uff1a<\/p>\n\n\n\n \u53ef\u4ee5\u770b\u5230\u8fd8\u662f\u5229\u7528EventPublishingRunListener\u53bb\u53d1\u5e03\u4e8b\u4ef6\uff0c\u90a3\u4e48\u5c31\u7ee7\u7eed\u8ddf\u8fdb\u5230\u5176\u5185\u90e8\u7684 \u5176\u4e2d\uff0c\u91cd\u70b9\u6765\u770b \u5148\u4ece \u53ef\u4ee5\u770b\u5230\uff0c\u5728\u53d1\u5e03\u4e8b\u4ef6\u5904\u7406\u7ed3\u675f\u540e\uff0cenvironment<\/strong>\u53d8\u91cf\u5b58\u653e\u4e86\u6211\u4eec\u5728 \u8fd9\u91cc\u7684ApplicationContext\u4e5f\u5e38\u88ab\u6210\u4e3aSpring\u5bb9\u5668\uff0c\u5b83\u662f\u57fa\u4e8e Spring \u6846\u67b6\u5b9a\u4e49\u7684 IoC \u5bb9\u5668<\/strong>\uff0c\u662f\u8d1f\u8d23 Bean \u751f\u547d\u5468\u671f\u7ba1\u7406\u7684\u6838\u5fc3\u7ec4\u4ef6\u3002<\/p>\n\n\n\n \u5148\u6839\u636e\u5bb9\u5668\u7c7b\u578b\u5224\u65ad\uff0c\u6b64\u5904\u662f \u7136\u540eprepareContext\u5f00\u59cb\u914d\u7f6e\u5bb9\u5668<\/p>\n\n\n\n \u8c03\u7528postProcess\u3001\u5faa\u73af\u8c03\u7528ApplicationContextInitializer\u4e2d\u7684initialize\u65b9\u6cd5\u3001\u5c06\u542f\u52a8\u7c7b\u6ce8\u5165\u5bb9\u5668<\/strong>\u3001\u53d1\u5e03\u5bb9\u5668\u5df2\u52a0\u8f7d(\u6253\u5370\u65e5\u5fd7)\u3002<\/p>\n\n\n\n \u8fd9\u6bb5\u4ee3\u7801\u662fspring\u67b6\u6784\u4e2d\u7684\u6838\u5fc3\uff0c\u662f\u5b9e\u73b0ioc\u548caop\u7684\u5173\u952e<\/strong>\uff1b\u8d1f\u8d23\u5237\u65b0\u5e94\u7528\u7a0b\u5e8f\u4e0a\u4e0b\u6587\uff0c\u8fd9\u91cc\u4e3b\u8981\u6d89\u53ca\u5230\u51c6\u5907\u5237\u65b0\u4e0a\u4e0b\u6587\uff0c\u8c03\u7528\u4e0a\u4e0b\u6587\u6ce8\u518c\u4e3a bean \u7684\u5de5\u5382\u5904\u7406\u5668\uff0c\u521d\u59cb\u5316\u4e0a\u4e0b\u6587\u7684\u6d88\u606f\u6e90\uff0c\u521d\u59cb\u5316\u7279\u5b9a\u4e0a\u4e0b\u6587\u5b50\u7c7b\u4e2d\u7684\u5176\u4ed6\u7279\u6b8a bean\uff0c\u68c0\u67e5\u76d1\u542c\u5668 bean \u5e76\u6ce8\u518c\uff0c\u6700\u540e\u53d1\u5e03\u76f8\u5e94\u7684\u4e8b\u4ef6\u5e76\u9500\u6bc1\u5df2\u7ecf\u521b\u5efa\u7684\u5355\u4f8b\u53ca\u91cd\u7f6e active \u6807\u5fd7\u3002<\/p>\n\n\n\n \u5927\u6982\u505a\u4e86\u8fd9\u4e9b\u4e8b\uff1a<\/p>\n\n\n\n \u6269\u5c55\u63a5\u53e3\uff0c\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u6a21\u677f\u65b9\u6cd5\uff0c\u9ed8\u8ba4\u4e3a\u7a7a\u5b9e\u73b0\u3002\u5982\u679c\u6709\u81ea\u5b9a\u4e49\u9700\u6c42\uff0c\u53ef\u4ee5\u91cd\u5199\u8be5\u65b9\u6cd5\u3002\u6bd4\u5982\u6253\u5370\u4e00\u4e9b\u542f\u52a8\u7ed3\u675flog\uff0c\u6216\u8005\u4e00\u4e9b\u5176\u5b83\u540e\u7f6e\u5904\u7406\u3002<\/p>\n\n\n\n \u5e94\u7528\u4e0a\u4e0b\u6587\u7684\u542f\u52a8\u4e2d\u4e5f\u5305\u62ec\u4e86\u5bf9Bean\u7684\u6ce8\u518c\u4ee5\u53ca\u5b9e\u4f8b\u5316\uff0c\u7531\u4e8e\u6bd4\u8f83\u91cd\u8981\uff0c\u8fd9\u91cc\u5c31\u5355\u72ec\u5c06\u5bf9Bean\u7684Bean\u7684\u6ce8\u518c\u3001\u5b9e\u4f8b\u5316\u3001\u521d\u59cb\u5316\u63d0\u51fa\u6765\u8bf4\u4e0b\uff1a<\/p>\n\n\n\n \u5728\u914d\u7f6e\u5bb9\u5668\uff08prepareContext\uff09<\/strong>\u7684 \u8fd9\u91cc\u6839\u636e\u4e0d\u540c\u7684\u4f20\u53c2\u8d70\u4e0d\u540c\u7684\u91cd\u8f7d\uff0c\u4e5f\u662fSpring\u626b\u63cf\u548c\u6784\u5efabean\u7684\u5206\u652f\u70b9\u3002\u8fd9\u91cc\u7684source\u662f\u4e3b\u7c7b.class\uff0c\u6240\u4ee5\u8d70\u7684\u662f\u7b2c\u4e00\u4e2aif\u5206\u652f\uff1a<\/p>\n\n\n\n \u8fd9\u91cc\u53ea\u5c06\u542f\u52a8\u7c7b\u6ce8\u5165\u5230\u4e86beanDefinitionMap\u3002<\/p>\n\n\n\n \u5728\u5237\u65b0\u5bb9\u5668\uff08refresh\uff09<\/strong>\u8fd9\u4e00\u6b65\uff0c\u548cBean\u7684\u88c5\u914d\u6709\u5173\u7684\u6b65\u9aa4\u4e3b\u8981\u5b9e\u73b0\u662finvokeBeanFactoryPostProcessors()<\/strong>\u3002\u5b83\u8c03\u7528\u6240\u6709\u5b9e\u73b0\u4e86BeanDefinitionRegistryPostProcessor\u63a5\u53e3\u7684\u7c7b\u7684postProcessBeanDefinitionRegistry()\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u5d4c\u5957\u548c\u8c03\u7528\u592a\u591a\uff0c\u662fspring\u7684\u6838\u5fc3ioc\uff0caop\u5b9e\u73b0\uff1a<\/p>\n\n\n\n \u5176\u4e2d\u6700\u6838\u5fc3\u7684\u4e00\u4e2a\u5b9e\u73b0\u7c7b\u662fConfigurationClassPostProcessor<\/strong>\u3002\u8fd9\u4e2a\u6d41\u7a0b\u5bf9\u4e8eBean\uff0c\u5927\u6982\u505a\u4e86\u8fd9\u6837\u51e0\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n \u6211\u4eec\u7684Controller\u3001Filter\u7b49\u670d\u52a1\u7c7b\u662f\u600e\u4e48\u88ab\u626b\u63cf\u5230\u7684\uff1fSpring\u4e2d\u7684Servlet\u5bb9\u5668\uff08Tomcat\uff09\u662f\u600e\u4e48\u542f\u52a8\u7684\uff1f<\/strong>\u5176\u5b9e\u4e5f\u5c31\u662f\u5728\u8fd9\u4e2a\u6b65\u9aa4\u3002<\/p>\n\n\n\n \u8fd9\u91cc\u4f1a\u53bb\u626b\u63cf\u5e76\u5904\u7406\u4f20\u5165source\u7684\u6ce8\u89e3\uff0c\u5982\u4e3b\u7c7b\u7684@SpringbootApplication<\/strong>\u3002@SpringbootApplication\u6ce8\u89e3\u5305\u542b\u4e86\u4e09\u4e2a\u91cd\u8981\u7684\u6ce8\u89e3\uff1a<\/p>\n\n\n\n 1.@SpringBootConfiguration<\/strong><\/p>\n\n\n\n \u672c\u8d28\u4e0a\u5c31\u662f 2.@EnableAutoConfiguration<\/strong><\/p>\n\n\n\n \u901a\u8fc7 3.@ComponentScan<\/strong><\/p>\n\n\n\n \u76f4\u63a5\u89e6\u53d1\u7ec4\u4ef6\u626b\u63cf\uff0c\u626b\u63cf\u4e3b\u7c7b\u6240\u5728\u5305\u53ca\u4ee5\u4e0b\u6240\u6709 \u628a\u90a3\u4e9b\u5e26\u6ce8\u89e3\u7684\u7c7b\u5305\u62ec \u5e76\u4e14\u8fd9\u91cc\u989d\u5916\u63d0\u5230\u4e00\u4e2a\u6ce8\u89e3EmbeddedServletContainerAutoConfiguration\uff1a\u5b83\u662f\u662f\u5d4c\u5165\u5f0fServlet\u5bb9\u5668\u7684\u81ea\u52a8\u914d\u7f6e\u7c7b\uff0c\u4f1a\u5148\u81ea\u52a8\u626b\u63cf\u5f53\u524d\u73af\u5883\u662f\u5426\u5f15\u5165Tomcat\uff08\u5982\u4f9d\u8d56\u914d\u7f6e\uff09\uff0c\u5982\u679c\u662f\u5219\u83b7\u53d6\u5de5\u7a0b\u7c7b\u3001\u5b9e\u4f8b\u5316Tomcat\u5e76\u8fd0\u884c \u5bf9@SpringBootApplication\u6ce8\u89e3\u5904\u7406\u540e\uff0c\u5927\u90e8\u5206\u7684bean\u4fbf\u90fd\u88ab\u6ce8\u518c\u5230beanDefinitionMap\u4e86\u3002<\/strong>\u5f53\u7136\u6211\u4eec\u77e5\u9053\uff0c\u9664\u4e86\u4e3b\u7c7b\u6709\u8fd9\u79cd”\u914d\u7f6e\u578b\u6ce8\u89e3”\uff0c\u5176\u5b83\u7c7b\u5305\u62ec\u7528\u6237\u81ea\u5b9a\u4e49\u7c7b\u3001spring\u5185\u90e8\u7c7b\u4e5f\u4f1a\u6709\u76f8\u5e94\u7684\u6ce8\u89e3\uff0c\u54ea\u600e\u4e48\u6837\u626b\u63cf\u5230\u5b83\u4eec\u5462<\/strong>\uff1f\u8fd9\u5c31\u8981\u63d0\u5230\u7b2c\u4e8c\u6b65\u4e86\uff1a<\/p>\n\n\n\n \u8fd9\u91cc\u8c03\u7528\u7684\u4e0e\u4e0a\u4e00\u6b65\u4e0d\u7528\uff0c\u8c03\u7528\u7684\u662fpackage\u7684\u91cd\u8f7d\uff1a<\/p>\n\n\n\n \u4f20\u5165\u4e3b\u7c7b\u7684\u5305\u540d\uff0c\u4f5c\u4e3anew SpringApplication(primarySources)).run(args)<\/code>;<\/p>\n\n\n\npublic ConfigurableApplicationContext run(String... args) {
\/\/ \u8ba1\u65f6\u5de5\u5177
StopWatch stopWatch = new StopWatch();
stopWatch.start();
ConfigurableApplicationContext context = null;
Collection<SpringBootExceptionReporter> exceptionReporters = new ArrayList<>();
configureHeadlessProperty();
\/\/ \u7b2c\u4e00\u6b65\uff1a\u83b7\u53d6\u5e76\u542f\u52a8\u76d1\u542c\u5668
SpringApplicationRunListeners listeners = getRunListeners(args);
listeners.starting();
try {
ApplicationArguments applicationArguments = new DefaultApplicationArguments(args);
\/\/ \u7b2c\u4e8c\u6b65\uff1a\u6839\u636eSpringApplicationRunListeners\u4ee5\u53ca\u53c2\u6570\u6765\u51c6\u5907\u73af\u5883
ConfigurableEnvironment environment = prepareEnvironment(listeners,applicationArguments);
configureIgnoreBeanInfo(environment);
\u200b
\/\/ \u51c6\u5907Banner\u6253\u5370\u5668 - \u5c31\u662f\u542f\u52a8Spring Boot\u7684\u65f6\u5019\u6253\u5370\u5728console\u4e0a\u7684ASCII\u827a\u672f\u5b57\u4f53
Banner printedBanner = printBanner(environment);
\u200b
\/\/ \u7b2c\u4e09\u6b65\uff1a\u521b\u5efaSpring\u5bb9\u5668
context = createApplicationContext();
\u200b
exceptionReporters = getSpringFactoriesInstances(
SpringBootExceptionReporter.class,
new Class[] { ConfigurableApplicationContext.class }, context);
\u200b
\/\/ \u7b2c\u56db\u6b65\uff1aSpring\u5bb9\u5668\u524d\u7f6e\u5904\u7406
prepareContext(context, environment, listeners, applicationArguments,printedBanner);
\u200b
\/\/ \u7b2c\u4e94\u6b65\uff1a\u5237\u65b0\u5bb9\u5668
refreshContext(context);
\u200b
\u3000\u3000\u3000\u3000 \/\/ \u7b2c\u516d\u6b65\uff1aSpring\u5bb9\u5668\u540e\u7f6e\u5904\u7406
afterRefresh(context, applicationArguments);
\u200b
\u3000\u3000\u3000 \/\/ \u7b2c\u4e03\u6b65\uff1a\u53d1\u51fa\u7ed3\u675f\u6267\u884c\u7684\u4e8b\u4ef6
listeners.started(context);
\/\/ \u7b2c\u516b\u6b65\uff1a\u6267\u884cRunners
this.callRunners(context, applicationArguments);
stopWatch.stop();
\/\/ \u8fd4\u56de\u5bb9\u5668
return context;
}
catch (Throwable ex) {
handleRunFailure(context, listeners, exceptionReporters, ex);
throw new IllegalStateException(ex);
}
}<\/pre>\n\n\n\n\u83b7\u53d6\u5e76\u542f\u52a8\u76d1\u542c\u5668(SpringApplicationRunListener)<\/h2>\n\n\n\n
SpringApplicationRunListeners listeners = getRunListeners(args);
listeners.starting();<\/pre>\n\n\n\nSpringboot\u542f\u52a8\u4e2d\u6d89\u53ca\u5230\u7684\u4e8b\u4ef6\u673a\u5236\u7ec4\u4ef6<\/h3>\n\n\n\n
\n
SpringApplication<\/code><\/strong><\/li>\n\n\n\nApplicationEvent<\/code><\/strong><\/li>\n<\/ul>\n\n\n\n\u4e8b\u4ef6\u540d<\/th> \u4f5c\u7528<\/th><\/tr><\/thead> ApplicationStartingEvent<\/td> \u6846\u67b6\u542f\u52a8\u4e8b\u4ef6<\/td><\/tr> ApplicationEnvironmentPreparedEvent<\/td> \u73af\u5883\u51c6\u5907\u5b8c\u6bd5\u4e8b\u4ef6<\/td><\/tr> ApplicationContextInitializedEvent<\/td> \u4e0a\u4e0b\u6587\u521d\u59cb\u5316<\/td><\/tr> ApplicationPreparedEvent<\/td> \u4e0a\u4e0b\u6587\u521b\u5efa\u5b8c\u6bd5\uff0c\u4f46\u662fBean\u8fd8\u6ca1\u6709\u52a0\u8f7d\u5b8c\u6bd5<\/td><\/tr> ApplicationStartedEvent<\/td> bean \u5b9e\u4f8b\u5316\u5b8c\u6210\uff0c\u4f46\u662f\u672a\u8c03\u7528 Runners\u63a5\u53e3<\/td><\/tr> ApplicationReadyEvent<\/td> \u8c03\u7528 Runners \u63a5\u53e3\u5b8c\u6bd5<\/td><\/tr> ApplicationFailedEvent<\/td> \u542f\u52a8\u5931\u8d25\u4e8b\u4ef6<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \n
ApplicationEventPublisher<\/code> \u53ca ApplicationEventMulticaster<\/code><\/strong><\/li>\n\n\n\njava.util.EventListener<\/code>\u5b50\u7c7b\u63a5\u53e3ApplicationListener<\/code><\/strong><\/li>\n<\/ul>\n\n\n\npublic interface ApplicationListener<E extends ApplicationEvent> extends EventListener {
void onApplicationEvent(E event);
static <T> ApplicationListener<PayloadApplicationEvent<T>> forPayload(Consumer<T> consumer) {
return (event) -> {
consumer.accept(event.getPayload());
};
}
}<\/pre>\n\n\n\nEventPublishingRunListener<\/code><\/strong><\/p>\n\n\n\n public class EventPublishingRunListener implements SpringApplicationRunListener, Ordered {
private final SpringApplication application;
private final String[] args;
\/\/\u5e7f\u64ad\u5668
private final SimpleApplicationEventMulticaster initialMulticaster;
public EventPublishingRunListener(SpringApplication application, String[] args) {
this.application = application;
this.args = args;
this.initialMulticaster = new SimpleApplicationEventMulticaster();
Iterator var3 = application.getListeners().iterator();
while(var3.hasNext()) {
ApplicationListener<?> listener = (ApplicationListener)var3.next();
\/\/\u5c06\u4e0a\u9762\u8bbe\u7f6e\u5230SpringApplication\u7684\u5341\u4e00\u4e2a\u76d1\u542c\u5668\u5168\u90e8\u6dfb\u52a0\u5230SimpleApplicationEventMulticaster\u8fd9\u4e2a\u5e7f\u64ad\u5668\u4e2d
this.initialMulticaster.addApplicationListener(listener);
}
}
\/\/\u7565...
}<\/pre>\n\n\n\n\u83b7\u53d6SpringApplicationRunListener<\/h3>\n\n\n\n
private SpringApplicationRunListeners getRunListeners(String[] args) {
Class<?>[] types = new Class[]{SpringApplication.class, String[].class};
return new SpringApplicationRunListeners(logger, this.getSpringFactoriesInstances(SpringApplicationRunListener.class, types, this, args), this.applicationStartup);
}<\/pre>\n\n\n\nSpringApplicationRunListeners<\/code><\/strong>\uff0c\u5c31\u662f\u5bf9\u83b7\u53d6\u5230\u76d1\u542c\u5668\u7684\u5305\u88c5\u3002<\/p>\n\n\n\nSpringApplication#getSpringFactoriesInstances<\/code><\/strong>\uff0c\u6700\u540e\u83b7\u53d6\u7684\u5c31\u662f\u4e00\u4e2aEventPublishingRunListener<\/code><\/strong><\/p>\n\n\n\n![\"image-20250622135046636\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/image-20250622135046636.png\")
<\/div><\/figure>\n\n\n\nprivate <T> Collection<T> getSpringFactoriesInstances(Class<T> type, Class<?>[] parameterTypes, Object... args) {
ClassLoader classLoader = this.getClassLoader();
Set<String> names = new LinkedHashSet(SpringFactoriesLoader.loadFactoryNames(type, classLoader));
List<T> instances = this.createSpringFactoriesInstances(type, parameterTypes, classLoader, args, names);
AnnotationAwareOrderComparator.sort(instances);
return instances;
}<\/pre>\n\n\n\nSpringFactoriesLoader.loadFactoryNames(type, classLoader)<\/code>\u8fd9\u4e00\u6b65\uff0c\u5c31\u662f\u6211\u4eec\u719f\u77e5\u7684\uff0c\u4eceMETA-INF\/spring.factories\u8bfb\u53d6bean\u7684\u5168\u9650\u5b9a\u7c7b\u540d<\/strong>\uff1b\u7ed3\u675f\u540e\u518d\u4f20\u7ed9\u4e0b\u9762\u7684\u65b9\u6cd5\u53cd\u5c04\u5b9e\u4f8b\u5316\u3002<\/p>\n\n\n\norg.springframework.boot.SpringApplicationRunListener=\\
org.springframework.boot.context.event.EventPublishingRunListener<\/pre>\n\n\n\nSpringApplicationRunListeners<\/code><\/strong>\u4e2d\u53ea\u6709\u8fd9\u4e2aEventPublishingRunListener<\/code><\/strong>\uff0c\u5f53\u7136\u4f60\u4e5f\u53ef\u4ee5\u81ea\u5df1\u6269\u5c55\uff0c\u5e76\u5728META-INF\/spring.factories<\/code>\u4e2d\u81ea\u5df1\u5199\u5165\u3002<\/p>\n\n\n\nMETA-INF\/spring.factories<\/code>\u53ca\u5176\u91cc\u9762\u7684\u5185\u5bb9\u662f\u54ea\u6765\u7684\u5462\uff1f<\/strong><\/p>\n\n\n\n <dependency>
<groupId>org.springframework.boot<\/groupId>
<artifactId>spring-boot-starter-web<\/artifactId>
<\/dependency><\/pre>\n\n\n\nspring-boot-autoconfigure-x.x.x<\/code><\/strong>\u7684\u4f9d\u8d56\uff0c<\/p>\n\n\n\n![\"image-20250622140553205\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/image-20250622140553205.png\")
<\/div><\/figure>\n\n\n\nMETA-INF\/spring.factories<\/code><\/strong>\u7b49\u4e00\u7cfb\u5217\u914d\u7f6e\uff0c\u5f53\u7136\uff0c\u5e76\u4e0d\u4f1a\u4e0e\u9879\u76ee\u76ee\u5f55\u4e2d\u624b\u52a8\u5efa\u7acb\u7684META-INF\/spring.factories<\/code><\/strong>\u51b2\u7a81\uff0c\u4e24\u4e2a\u6587\u4ef6\u4f1a\u5408\u5e76\u89e3\u6790\u3002<\/p>\n\n\n\n\u542f\u52a8SpringApplicationRunListener<\/h3>\n\n\n\n
public class EventPublishingRunListener implements SpringApplicationRunListener, Ordered {
private final SpringApplication application;
private final String[] args;
private final SimpleApplicationEventMulticaster initialMulticaster;
...
}<\/pre>\n\n\n\npublic interface SpringApplicationRunListener {
\u200b
\/\/ \u5728run()\u65b9\u6cd5\u5f00\u59cb\u6267\u884c\u65f6\uff0c\u8be5\u65b9\u6cd5\u5c31\u7acb\u5373\u88ab\u8c03\u7528\uff0c\u53ef\u7528\u4e8e\u5728\u521d\u59cb\u5316\u6700\u65e9\u671f\u65f6\u505a\u4e00\u4e9b\u5de5\u4f5c
void starting();
\/\/ \u5f53environment\u6784\u5efa\u5b8c\u6210\uff0cApplicationContext\u521b\u5efa\u4e4b\u524d\uff0c\u8be5\u65b9\u6cd5\u88ab\u8c03\u7528
void environmentPrepared(ConfigurableEnvironment environment);
\/\/ \u5f53ApplicationContext\u6784\u5efa\u5b8c\u6210\u65f6\uff0c\u8be5\u65b9\u6cd5\u88ab\u8c03\u7528
void contextPrepared(ConfigurableApplicationContext context);
\/\/ \u5728ApplicationContext\u5b8c\u6210\u52a0\u8f7d\uff0c\u4f46\u6ca1\u6709\u88ab\u5237\u65b0\u524d\uff0c\u8be5\u65b9\u6cd5\u88ab\u8c03\u7528
void contextLoaded(ConfigurableApplicationContext context);
\/\/ \u5728ApplicationContext\u5237\u65b0\u5e76\u542f\u52a8\u540e\uff0cCommandLineRunners\u548cApplicationRunner\u672a\u88ab\u8c03\u7528\u524d\uff0c\u8be5\u65b9\u6cd5\u88ab\u8c03\u7528
void started(ConfigurableApplicationContext context);
\/\/ \u5728run()\u65b9\u6cd5\u6267\u884c\u5b8c\u6210\u524d\u8be5\u65b9\u6cd5\u88ab\u8c03\u7528
void running(ConfigurableApplicationContext context);
\/\/ \u5f53\u5e94\u7528\u8fd0\u884c\u51fa\u9519\u65f6\u8be5\u65b9\u6cd5\u88ab\u8c03\u7528
void failed(ConfigurableApplicationContext context, Throwable exception);
}<\/pre>\n\n\n\n@Override
public void starting() {
\/\/\u5173\u952e\u4ee3\u7801\uff0c\u5148\u521b\u5efaapplication\u542f\u52a8\u4e8b\u4ef6`ApplicationStartingEvent`
this.initialMulticaster.multicastEvent(new ApplicationStartingEvent(this.application, this.args));
}<\/pre>\n\n\n\nSimpleApplicationEventMulticaster<\/code><\/strong>\u5bf9\u8c61\u7684multicastEvent\uff0c\u51c6\u5907\u5229\u7528\u5e7f\u64ad\u5668\u53d1\u5e03\u4e8b\u4ef6\u5e76\u53c8\u542f\u7528\u76d1\u542c\u5668\u3002\u5176\u5927\u90e8\u5206\u5bf9\u4e8b\u4ef6\u7684\u5904\u7406\u90fd\u662f\u8c03\u7528Multicaster\uff0c\u53ef\u89c1\u5f97\u8fd9\u4e2a\u76d1\u542c\u5668\u7684\u804c\u8d23\u66f4\u50cf\u662f\u4f5c\u4e3aMulticaster<\/code>\u7684\u8865\u5145\u3002<\/p>\n\n\n\n@Override
public void multicastEvent(final ApplicationEvent event, @Nullable ResolvableType eventType) {
ResolvableType type = (eventType != null ? eventType : resolveDefaultEventType(event));
\/\/\u901a\u8fc7\u4e8b\u4ef6\u7c7b\u578bApplicationStartingEvent\u83b7\u53d6\u5bf9\u5e94\u7684\u76d1\u542c\u5668
for (final ApplicationListener<?> listener : getApplicationListeners(event, type)) {
\/\/\u83b7\u53d6\u7ebf\u7a0b\u6c60\uff0c\u5982\u679c\u4e3a\u7a7a\u5219\u540c\u6b65\u5904\u7406\u3002\u8fd9\u91cc\u7ebf\u7a0b\u6c60\u4e3a\u7a7a\uff0c\u8fd8\u672a\u6ca1\u521d\u59cb\u5316\u3002
Executor executor = getTaskExecutor();
if (executor != null) {
\/\/\u5f02\u6b65\u53d1\u9001\u4e8b\u4ef6
executor.execute(() -> invokeListener(listener, event));
}
else {
\/\/\u540c\u6b65\u53d1\u9001\u4e8b\u4ef6
invokeListener(listener, event);
}
}
}<\/pre>\n\n\n\ngetApplicationListeners<\/code><\/strong>\u65b9\u6cd5\u4f1a\u628a\u5165\u53c2\u4e8b\u4ef6\u7684.class\u53d6\u51fa\u6765\uff0c\u5e76\u770b\u54ea\u4e9b\u76d1\u542c\u5668(\u76d1\u542c\u5668\u4e5f\u662f\u4eceMETA-INF\/spring.factories<\/code><\/strong>\u4e2d\u53d6\u51fa\u5b9e\u4f8b\u5316)\u5bf9\u8fd9\u4e2a\u4e8b\u4ef6event\u548c\u4e8b\u4ef6\u6e90source”\u611f\u5174\u8da3”\uff08\u5728\u6bcf\u4e2aListener\u4e2d\u5b9a\u4e49\u4e86\u5217\u8868\uff0c\u5bf9\u5e94\u5177\u4f53\u4e8b\u4ef6\u3001\u4e8b\u4ef6\u6e90\u7c7b\uff0c\u4f20\u5165\u7684\u4e8b\u4ef6\u5728\u8fd9\u5217\u8868\u91cc\u9762\u5c31\u8868\u793a\u76d1\u542c\u5668\u5bf9\u5176”\u611f\u5174\u8da3”\uff09\u5e76\u5c06\u6240\u6709\u5bf9\u8be5\u4e8b\u4ef6”\u611f\u5174\u8da3”\u7684\u76d1\u542c\u5668\u8fd4\u56de\u3002<\/p>\n\n\n\n![\"image-20250622144531608\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/image-20250622144531608.png\")
<\/div><\/figure>\n\n\n\n![\"image-20250622144756408\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/image-20250622144756408.png\")
<\/div><\/figure>\n\n\n\npublic void onApplicationEvent(ApplicationEvent event) {
\/\/\u5728springboot\u542f\u52a8\u7684\u65f6\u5019
if (event instanceof ApplicationStartedEvent) {
onApplicationStartedEvent((ApplicationStartedEvent) event);
}
\/\/springboot\u7684Environment\u73af\u5883\u51c6\u5907\u5b8c\u6210\u7684\u65f6\u5019
else if (event instanceof ApplicationEnvironmentPreparedEvent) {
onApplicationEnvironmentPreparedEvent(
(ApplicationEnvironmentPreparedEvent) event);
}
\/\/\u5728springboot\u5bb9\u5668\u7684\u73af\u5883\u8bbe\u7f6e\u5b8c\u6210\u4ee5\u540e
else if (event instanceof ApplicationPreparedEvent) {
onApplicationPreparedEvent((ApplicationPreparedEvent) event);
}
\/\/\u5bb9\u5668\u5173\u95ed\u7684\u65f6\u5019
else if (event instanceof ContextClosedEvent && ((ContextClosedEvent) event)
.getApplicationContext().getParent() == null) {
onContextClosedEvent();
}
\/\/\u5bb9\u5668\u542f\u52a8\u5931\u8d25\u7684\u65f6\u5019
else if (event instanceof ApplicationFailedEvent) {
onApplicationFailedEvent();
}
}<\/pre>\n\n\n\n SpringApplicationRunListeners listeners = getRunListeners(args);
listeners.starting();<\/pre>\n\n\n\n\u73af\u5883\u51c6\u5907<\/h2>\n\n\n\n
ConfigurableEnvironment environment = prepareEnvironment(listeners,applicationArguments);<\/pre>\n\n\n\n
private ConfigurableEnvironment prepareEnvironment(
SpringApplicationRunListeners listeners,
ApplicationArguments applicationArguments) {
\/\/\u83b7\u53d6\u5bf9\u5e94\u7684ConfigurableEnvironment
ConfigurableEnvironment environment = getOrCreateEnvironment();
configureEnvironment(environment, applicationArguments.getSourceArgs());
\/\/\u53d1\u5e03\u73af\u5883\u5df2\u51c6\u5907\u4e8b\u4ef6\uff0c\u8fd9\u662f\u7b2c\u4e8c\u6b21\u53d1\u5e03\u4e8b\u4ef6
listeners.environmentPrepared(environment);
bindToSpringApplication(environment);
ConfigurationPropertySources.attach(environment);
return environment;
}<\/pre>\n\n\n\nSimpleApplicationEventMulticaster#multicast<\/code><\/strong>\uff0c\u4f1a\u8c03\u7528\u5230\u7684\u76d1\u542c\u5668\uff1a<\/p>\n\n\n\n![\"image-20250623153555549\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/image-20250623153555549.png\")
<\/div><\/figure>\n\n\n\nConfigFileApplicationListener<\/code><\/strong>\uff0c\u8be5\u76d1\u542c\u5668\u975e\u5e38\u6838\u5fc3\uff0c\u4e3b\u8981\u7528\u6765\u5904\u7406\u9879\u76ee\u914d\u7f6e\u3002\u9879\u76ee\u4e2d\u7684 properties \u548cyml\u6587\u4ef6\u90fd\u662f\u5176\u5185\u90e8\u7c7b\u6240\u52a0\u8f7d\u3002<\/p>\n\n\n\n![\"image-20250623154407103\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/image-20250623154407103.png\")
<\/div><\/figure>\n\n\n\nMETA-INF\/spring.factories<\/code>\u4e2d\u8bfb\u53d6\u51e0\u4e2aProcessors\uff0c\u518d\u6267\u884c\u5176postProcessEnvironment\uff0c\u6700\u540e\u6267\u884c\u8be5\u76d1\u542c\u5668\u672c\u8eab\u7684\u903b\u8f91\uff0c\u5373\u52a0\u8f7d\u5176\u5b9a\u4e49\u8def\u5f84\u4e0b\u7684\u914d\u7f6e\u6587\u4ef6\uff1a<\/p>\n\n\n\nprivate static final String DEFAULT_SEARCH_LOCATIONS = \"classpath:\/,classpath:\/config\/,file:.\/,file:.\/config\/\";<\/pre>\n\n\n\n
resources\\application.properties<\/code><\/strong>\u914d\u7f6e\u7684\u53c2\u6570\uff1a<\/p>\n\n\n\n![\"image-20250623170329712\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/image-20250623170329712.png\")
<\/div><\/figure>\n\n\n\n\u5e94\u7528\u4e0a\u4e0b\u6587\u7684\u521d\u59cb\u5316\u3001\u540e\u5904\u7406<\/h2>\n\n\n\n
context = createApplicationContext();
context.setApplicationStartup(this.applicationStartup);
prepareContext(bootstrapContext, context, environment, listeners, applicationArguments, printedBanner);
afterRefresh(context, applicationArguments);<\/pre>\n\n\n\n1.createApplicationContext<\/h3>\n\n\n\n
SERVLET<\/code>\u7c7b\u578b\uff0c\u6240\u4ee5\u4f1a\u901a\u8fc7\u53cd\u5c04\u88c5\u8f7d\u5bf9\u5e94\u7684\u5b57\u8282\u7801\uff0c\u4e5f\u5c31\u662fAnnotationConfigServletWebServerApplicationContext<\/strong>\u3002<\/p>\n\n\n\n2.prepareContext\uff08\u521d\u59cb\u53161\uff09<\/h3>\n\n\n\n
private void prepareContext(ConfigurableApplicationContext context,
ConfigurableEnvironment environment, SpringApplicationRunListeners listeners,
ApplicationArguments applicationArguments, Banner printedBanner) {
\/\/\u8bbe\u7f6e\u5bb9\u5668\u73af\u5883\uff0c\u5305\u62ec\u5404\u79cd\u53d8\u91cf
context.setEnvironment(environment);
\/\/\u6267\u884c\u5bb9\u5668\u540e\u7f6e\u5904\u7406
postProcessApplicationContext(context);
\/\/\u6267\u884c\u5bb9\u5668\u4e2d\u7684ApplicationContextInitializer\uff08\u5305\u62ec spring.factories\u548c\u81ea\u5b9a\u4e49\u7684\u5b9e\u4f8b\uff09
applyInitializers(context);
\u3000\u3000\/\/\u53d1\u9001\u5bb9\u5668\u5df2\u7ecf\u51c6\u5907\u597d\u7684\u4e8b\u4ef6\uff0c\u901a\u77e5\u5404\u76d1\u542c\u5668
listeners.contextPrepared(context);
\/\/\u6ce8\u518c\u542f\u52a8\u53c2\u6570bean\uff0c\u8fd9\u91cc\u5c06\u5bb9\u5668\u6307\u5b9a\u7684\u53c2\u6570\u5c01\u88c5\u6210bean\uff0c\u6ce8\u5165\u5bb9\u5668
context.getBeanFactory().registerSingleton(\"springApplicationArguments\",
applicationArguments);
\/\/\u8bbe\u7f6ebanner
if (printedBanner != null) {
context.getBeanFactory().registerSingleton(\"springBootBanner\", printedBanner);
}
\/\/\u83b7\u53d6\u6211\u4eec\u7684\u542f\u52a8\u7c7b\u6307\u5b9a\u7684\u53c2\u6570\uff0c\u53ef\u4ee5\u662f\u591a\u4e2a
Set<Object> sources = getAllSources();
Assert.notEmpty(sources, \"Sources must not be empty\");
\/\/\u52a0\u8f7d\u6211\u4eec\u7684\u542f\u52a8\u7c7b\uff0c\u5c06\u542f\u52a8\u7c7b\u6ce8\u5165\u5bb9\u5668
load(context, sources.toArray(new Object[0]));
\/\/\u53d1\u5e03\u5bb9\u5668\u5df2\u52a0\u8f7d\u4e8b\u4ef6\u3002
listeners.contextLoaded(context);
}<\/pre>\n\n\n\n3.refresh\uff08\u521d\u59cb\u53162\uff09<\/h3>\n\n\n\n
public void refresh() throws BeansException, IllegalStateException {
synchronized (this.startupShutdownMonitor) {
\/\/ \u542f\u52a8\u6b65\u9aa4\u6807\u8bb0
StartupStep contextRefresh = this.applicationStartup.start(\"spring.context.refresh\");
\/\/ \u51c6\u5907\u5237\u65b0 Prepare this context for refreshing.
prepareRefresh();
\/\/ \u901a\u77e5\u5b50\u7c7b\u5237\u65b0\u5185\u90e8bean\u5de5\u5382 Tell the subclass to refresh the internal bean factory.
ConfigurableListableBeanFactory beanFactory = obtainFreshBeanFactory();
\/\/ \u51c6\u5907\u5de5\u5382\u4ee5\u4fbf\u5728\u6b64\u4e0a\u4e0b\u6587\u4e2d\u4f7f\u7528 Prepare the bean factory for use in this context.
prepareBeanFactory(beanFactory);
try {
\/\/ Allows post-processing of the bean factory in context subclasses.
\/\/ Bean\u5de5\u5382\u540e\u7f6e\u5904\u7406
postProcessBeanFactory(beanFactory);
\/\/ \u6b65\u9aa4\u6807\u8bb0
StartupStep beanPostProcess = this.applicationStartup.start(\"spring.context.beans.post-process\");
\/\/ Invoke factory processors registered as beans in the context.
\/\/ \u6267\u884cBean\u5de5\u5382\u540e\u7f6e\u5904\u7406 \u6838\u5fc3\u5927\u54e5\u6709\u4e2a\u662fConfigurationClassPostProcessor @Configuration @ComponentScan\u90fd\u662f\u8fd9\u5927\u54e5
invokeBeanFactoryPostProcessors(beanFactory);
\/\/ \u6ce8\u518cBean \u540e\u7f6e\u5904\u7406\u5668 Register bean processors that intercept bean creation.
registerBeanPostProcessors(beanFactory);
beanPostProcess.end();
\/\/ \u56fd\u9645\u5316 Initialize message source for this context.
initMessageSource();
\/\/ \u6ce8\u518c\u4e8b\u4ef6\u53d1\u5e03\u5668 Initialize event multicaster for this context.
initApplicationEventMulticaster();
\/\/ Initialize other special beans in specific context subclasses.
\/\/ \u8fd9\u91cc\u5bf9\u4e8eSpringBoot\u4e3b\u8981\u5c31\u662f\u521b\u5efaWebServer
onRefresh();
\/\/ \u6ce8\u518c\u76d1\u542c\u5668 Check for listener beans and register them.
registerListeners();
\/\/ \u521d\u59cb\u5316\u975e\u5ef6\u8fdf\u52a0\u8f7dBean Instantiate all remaining (non-lazy-init) singletons.
finishBeanFactoryInitialization(beanFactory);
\/\/ \u5b8c\u6210\u5237\u65b0 Last step: publish corresponding event.
finishRefresh();
}
catch (BeansException ex) {
if (logger.isWarnEnabled()) {
logger.warn(\"Exception encountered during context initialization - \" +
\"cancelling refresh attempt: \" + ex);
}
\/\/ \u9500\u6bc1Bean Destroy already created singletons to avoid dangling resources.
destroyBeans();
\/\/ \u53d6\u6d88\u5237\u65b0 Reset 'active' flag.
cancelRefresh(ex);
\/\/ Propagate exception to caller.
throw ex;
}
finally {
\/\/ Reset common introspection caches in Spring's core, since we
\/\/ might not ever need metadata for singleton beans anymore...
resetCommonCaches();
\/\/ \u4e0a\u4e0b\u6587\u5237\u65b0\u7ed3\u675f
contextRefresh.end();
}
}
}<\/pre>\n\n\n\n\n
prepareRefresh()<\/code>\uff09\u2014\u2014 \u521d\u59cb\u5316\u73af\u5883\u53d8\u91cf\u3001\u542f\u52a8\u65f6\u95f4\u7b49\u3002<\/li>\n\n\n\nBeanFactory<\/code><\/strong>\uff08obtainFreshBeanFactory()<\/code>\uff09\u2014\u2014 \u53ea\u662f\u5c06DefaultListableBeanFactory<\/code> Bean \u5de5\u5382\u5237\u65b0\u72b6\u6001\u4e3a\u5df2\u5237\u65b0\u3002<\/li>\n\n\n\nBeanFactory<\/code><\/strong>\uff08prepareBeanFactory()<\/code>\uff09\u2014\u2014 \u83b7\u53d6\u5230Bean \u5de5\u5382\u540e\uff0c\u5f00\u59cb\u51c6\u5907Bean \u5de5\u5382\uff0c\u4e3b\u8981\u662f\u8fdb\u884c\u529f\u80fd\u6269\u5c55\uff0c\u5165\u8bbe\u7f6e\u7c7b\u52a0\u8f7d\u5668\u3001Aware \u63a5\u53e3\u652f\u6301\u7b49\uff0c\u8fd9\u91cc\u8fd8\u8bbe\u7f6e\u4e86SPEL \u8868\u8fbe\u5f0f\u89e3\u6790\u5668<\/strong>\u3002<\/li>\n\n\n\ninvokeBeanFactoryPostProcessors()<\/code>\uff09\u2014\u2014 \u4fee\u6539\u6216\u589e\u5f3a Bean \u5b9a\u4e49\uff08\u5982 @Configuration<\/code> \u7c7b\u5904\u7406\uff09\u3002<\/li>\n\n\n\nregisterBeanPostProcessors()<\/code>\uff09\u2014\u2014 \u4e3b\u8981\u662f\u5c06\u8fd9\u4e9b\u540e\u7f6e\u5904\u7406\u5668\u8fdb\u884c\u5206\u7c7b\uff0c\u5e76\u6dfb\u52a0\u5230Bean \u5de5\u5382\u4e2d\uff09\u3002<\/li>\n\n\n\ninitMessageSource()<\/code>, initApplicationEventMulticaster()<\/code>\uff09\u3002<\/li>\n\n\n\nfinishBeanFactoryInitialization()<\/code>\uff09\u2014\u2014 \u89e6\u53d1\u4f9d\u8d56\u6ce8\u5165\u548c\u521d\u59cb\u5316\u3002<\/li>\n\n\n\nfinishRefresh()<\/code>\uff09\u2014\u2014 \u53d1\u5e03 ContextRefreshedEvent<\/code> \u4e8b\u4ef6\uff0c\u6807\u5fd7\u5bb9\u5668\u5c31\u7eea\u3002<\/li>\n<\/ol>\n\n\n\n4.afterRefresh\uff08\u540e\u5904\u7406\uff09<\/h3>\n\n\n\n
Bean\u7684\u6ce8\u518c\u3001\u5b9e\u4f8b\u5316\u3001\u521d\u59cb\u5316<\/h3>\n\n\n\n
\u626b\u63cf\u4e3b\u7c7b<\/strong><\/h4>\n\n\n\n
load(context, sources.toArray(new Object[0]));<\/code><\/strong>\u8fd9\u4e00\u6b65\uff0c\u8c03\u7528\u4e86BeanDefinitionLoader#load<\/code><\/strong>\uff0c<\/p>\n\n\n\nprivate void load(Object source) {
Assert.notNull(source, \"Source must not be null\");
if (source instanceof Class<?>) {
load((Class<?>) source);
return;
}
if (source instanceof Resource) {
load((Resource) source);
return;
}
if (source instanceof Package) {
load((Package) source);
return;
}
if (source instanceof CharSequence) {
load((CharSequence) source);
return;
}
throw new IllegalArgumentException(\"Invalid source type \" + source.getClass());
}<\/pre>\n\n\n\nprivate int load(Class<?> source) {
if (isGroovyPresent()
&& GroovyBeanDefinitionSource.class.isAssignableFrom(source)) {
\/\/ Any GroovyLoaders added in beans{} DSL can contribute beans here
GroovyBeanDefinitionSource loader = BeanUtils.instantiateClass(source,
GroovyBeanDefinitionSource.class);
load(loader);
}
if (isComponent(source)) {
\/\/\u4ee5\u6ce8\u89e3\u7684\u65b9\u5f0f\uff0c\u5c06\u542f\u52a8\u7c7bbean\u4fe1\u606f\u5b58\u5165beanDefinitionMap\uff0c\u4e5f\u5c31\u662f\u5c06HelloWorldMainApplication.class\u5b58\u5165\u4e86beanDefinitionMap
this.annotatedReader.register(source);
return 1;
}
return 0;
}<\/pre>\n\n\n\n\u626b\u63cf\u5e76\u6ce8\u518cbean<\/strong><\/h4>\n\n\n\n
\u5904\u7406\u6ce8\u89e3<\/strong><\/h5>\n\n\n\n
@Configuration<\/code>\uff0c\u628a\u4e3b\u7c7b\u5f53\u6210\u4e00\u4e2a\u914d\u7f6e\u7c7b\u6ce8\u518c\u5230 Spring \u5bb9\u5668\u91cc\uff08\u5c06\u4e3b\u7c7b\u7684 @Bean<\/code> \u65b9\u6cd5\uff08\u5982\u679c\u6709\uff09\u7eb3\u5165\u5bb9\u5668\u7ba1\u7406\uff09\u3002<\/p>\n\n\n\n@Import(AutoConfigurationImportSelector.class)<\/code>\uff0c\u8c03\u7528 AutoConfigurationImportSelector.selectImports(...)<\/code>\u3002<\/p>\n\n\n\n\n
SpringFactoriesLoader.loadFactoryNames(...)<\/code> \u53bb\u8bfb\u53d6\u6240\u6709\u4f9d\u8d56 JAR \u4e2d\u7684 META\u2011INF\/spring.factories<\/code>\uff0c\u62ff\u5230\u81ea\u52a8\u914d\u7f6e\u7c7b\u5217\u8868\u3002<\/li>\n\n\n\n@Controller<\/code>\u3001@Service<\/code>\u3001@Repository<\/code>\u3001@Component<\/code> \u7b49\u6ce8\u89e3\uff0c\u6ce8\u518c\u6210 BeanDefinition\u3002<\/p>\n\n\n\n@Controller<\/code>\u2014\u2014\u90fd\u6293\u51fa\u6765\uff0c\u5305\u88c5\u6210BeanDefinition\uff0c\u5b9e\u4f8b\u5316\u5e76\u653e\u5230 IOC \u5bb9\u5668\u91cc\u3002<\/p>\n\n\n\nTomcat.start()<\/code><\/strong><\/p>\n\n\n\n\u8c03\u7528
BeanDefinitionLoader#load<\/code><\/strong><\/h5>\n\n\n\nprivate void load(Package source) {
this.scanner.scan(source.getName());
}<\/pre>\n\n\n\nClassPathBeanDefinitionScanner.scan<\/code><\/strong>\u7684\u5165\u53c2\u3002\u8fd9\u4e2a\u7c7b\u53c8\u4f1a\u53bb\u8c03\u7528doScan\uff0c\u53c8\u5c06\u4e3b\u7c7b\u5305\u4e0b\u9012\u5f52\u641c\u7d22\uff0c\u5c06\u626b\u63cf\u7684\u6ce8\u89e3\u8fdb\u884c\u5904\u7406\uff0c\u5982\u5904\u7406\u5e38\u89c1\u6ce8\u89e3\uff08@Lazy<\/code>\u3001@Primary<\/code>\u3001@DependsOn<\/code> \u7b49\uff09\uff1b\u7ed3\u5408 includeFilters<\/code> \u548c excludeFilters<\/code> \u5224\u65ad\u54ea\u4e9b\u7c7b\u662f\u5019\u9009\u5bf9\u8c61\uff08\u4f8b\u5982\u6807\u6ce8\u4e86 @Component<\/code>\u3001@Controller<\/code>\u3001@Service<\/code> \u7b49\uff09\uff1b\u626b\u63cf\u6ce8\u89e3\u7684\u4f5c\u7528\u57df@Scope<\/strong>\uff0c\u4e3a\u5c01\u88c5\u7684BeanDefinition\u63d0\u4f9b\u4fe1\u606f\uff0c\u6700\u540e\u6ce8\u5165\u5230beanDefinitionMap\u3002<\/p>\n\n\n\nbean\u7684\u521d\u59cb\u5316\u548c\u5b9e\u4f8b\u5316<\/h4>\n\n\n\n