springboot-第五章 SpringBoot部署war项目到tomcat9和启动原理

springboot项目达成war包需要在pom文件中添加<packaging>war</packaging>

 

@SpringBootApplication
//@SpringBootConfiguration
//@EnableAutoConfiguration
//@ComponentScan
public class AutogenprojectApplication extends SpringBootServletInitializer {

   public static void main(String[] args) {
      SpringApplication.run(AutogenprojectApplication.class, args);}
   @Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder)
   {
      return builder.sources(AutogenprojectApplication.class);
   }
}

 

<build>
   <finalName>mySringBoot</finalName>
   <plugins>

 

在pom的build标签中增加finalName标签可以在idea的编译中生成mySpringBoot.war。但是在maven3.2.2中无法识别这个标签，编译后的仍然是 项目名-0.0.1-SNAPSHOT.war

 

SpringBoot2.x的启动原理，下面是SpringApplication.run里面的源码。

 

public ConfigurableApplicationContext run(String... args) {
    StopWatch stopWatch = new StopWatch();是用来监控程序执行情况
    stopWatch.start();
    ConfigurableApplicationContext context = null;
    Collection<SpringBootExceptionReporter> exceptionReporters = new ArrayList();
    this.configureHeadlessProperty();
    SpringApplicationRunListeners listeners = this.getRunListeners(args);
    listeners.starting();

    Collection exceptionReporters;
    try {
        ApplicationArguments applicationArguments = new DefaultApplicationArguments(args);
        ConfigurableEnvironment environment = this.prepareEnvironment(listeners, applicationArguments);
        this.configureIgnoreBeanInfo(environment);
        Banner printedBanner = this.printBanner(environment);
        context = this.createApplicationContext();
        exceptionReporters = this.getSpringFactoriesInstances(SpringBootExceptionReporter.class, new Class[]{ConfigurableApplicationContext.class}, context);
        this.prepareContext(context, environment, listeners, applicationArguments, printedBanner);
        this.refreshContext(context);
        this.afterRefresh(context, applicationArguments);
        stopWatch.stop();
        if (this.logStartupInfo) {
            (new StartupInfoLogger(this.mainApplicationClass)).logStarted(this.getApplicationLog(), stopWatch);
        }

        listeners.started(context);
        this.callRunners(context, applicationArguments);
    } catch (Throwable var10) {
        this.handleRunFailure(context, var10, exceptionReporters, listeners);
        throw new IllegalStateException(var10);
    }

    try {
        listeners.running(context);
        return context;
    } catch (Throwable var9) {
        this.handleRunFailure(context, var9, exceptionReporters, (SpringApplicationRunListeners)null);
        throw new IllegalStateException(var9);
    }
}