springBoot源码（一）

构造函数

运行代码

public ConfigurableApplicationContext run(String... args) {Startup startup = Startup.create();if (this.registerShutdownHook) {SpringApplication.shutdownHook.enableShutdownHookAddition();}DefaultBootstrapContext bootstrapContext = createBootstrapContext();ConfigurableApplicationContext context = null;//设置java.awt.headless的系统参数configureHeadlessProperty();//获取监听器SpringApplicationRunListeners listeners = getRunListeners(args);listeners.starting(bootstrapContext, this.mainApplicationClass);try {ApplicationArguments applicationArguments = new DefaultApplicationArguments(args);//配置运行环境ConfigurableEnvironment environment = prepareEnvironment(listeners, bootstrapContext, applicationArguments);Banner printedBanner = printBanner(environment);context = createApplicationContext();context.setApplicationStartup(this.applicationStartup);prepareContext(bootstrapContext, context, environment, listeners, applicationArguments, printedBanner);refreshContext(context);afterRefresh(context, applicationArguments);startup.started();if (this.logStartupInfo) {new StartupInfoLogger(this.mainApplicationClass).logStarted(getApplicationLog(), startup);}listeners.started(context, startup.timeTakenToStarted());callRunners(context, applicationArguments);}catch (Throwable ex) {throw handleRunFailure(context, ex, listeners);}try {if (context.isRunning()) {listeners.ready(context, startup.ready());}}catch (Throwable ex) {throw handleRunFailure(context, ex, null);}return context;}