[问题记录] spring-boot 打印启动时间

问题

spring-boot 工程启动结束会打印启动时间

Started Application in 12.805 seconds (JVM running for 20.686)

最近新建一个工程发现启动完后并没有打印上面的那句话

解决

查看源码，发现打印日志在

public ConfigurableApplicationContext run(String... args) {
StopWatch stopWatch = new StopWatch();
stopWatch.start();
ConfigurableApplicationContext context = null;
FailureAnalyzers analyzers = null;
configureHeadlessProperty();
SpringApplicationRunListeners listeners = getRunListeners(args);
listeners.starting();
try {
ApplicationArguments applicationArguments = new DefaultApplicationArguments(
args);
ConfigurableEnvironment environment = prepareEnvironment(listeners,
applicationArguments);
Banner printedBanner = printBanner(environment);
context = createApplicationContext();
analyzers = new FailureAnalyzers(context);
prepareContext(context, environment, listeners, applicationArguments,printedBanner);

//著名的refresh
refreshContext(context);

afterRefresh(context, applicationArguments);
listeners.finished(context, null);
stopWatch.stop();

//打印启动时间日志
if (this.logStartupInfo) {
new StartupInfoLogger(this.mainApplicationClass)
.logStarted(getApplicationLog(), stopWatch);
}
return context;
}
catch (Throwable ex) {
handleRunFailure(context, listeners, analyzers, ex);
throw new IllegalStateException(ex);
}
}

public void logStarted(Log log, StopWatch stopWatch) {
if (log.isInfoEnabled()) {
log.info(getStartedMessage(stopWatch));
}
}

其打印是的info级日志，而我在logback配置启动类Application包的别类是WARN级别的，所以它并不打印时间，把启动类Application所在包日志级别改为info即可。