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;
	}