先说结论
SpringBoot Application共支持6种事件监听，按顺序分别是：
- ApplicationStartingEvent：在Spring最开始启动的时候触发
- ApplicationEnvironmentPreparedEvent：在Spring已经准备好上下文但是上下文尚未创建的时候触发
- ApplicationPreparedEven本文来源gao($daima.com搞@代@#码(网t：在Bean定义加载之后、刷新上下文之前触发
- ApplicationStartedEvent：在刷新上下文之后、调用application命令之前触发
- ApplicationReadyEvent：在调用applicaiton命令之后触发
- ApplicationFailedEvent：在启动Spring发生异常时触发
另外：
- ApplicationRunner和CommandLineRunner的执行在第五步和第六步之间
- Bean的创建在第三步和第四步之间
- 在启动类中，执行SpringApplication.run()方法后的代码，会在第六步后执行
再上代码：
ApplicationStartingEvent
public class ApplicationStartingEventListener implements ApplicationListener<ApplicationStartingEvent> {
@Override
public void onApplicationEvent(ApplicationStartingEvent applicationStartingEvent) {
System.out.println("============>>>>> applicationStartingEvent is trigged");
System.out.println(applicationStartingEvent.getTimestamp());
System.out.println("============>>>>> End");
}
}
ApplicationEnvironmentPreparedEvent
public class ApplicationEnvironmentPreparedEventListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent> {
@Override
public void onApplicationEvent(ApplicationEnvironmentPreparedEvent applicationEnvironmentPreparedEvent) {
System.out.println("============>>>>> ApplicationEnvironmentPreparedEvent is trigged");
System.out.println(applicationEnvironmentPreparedEvent.getTimestamp());
System.out.println("============>>>>> End");
}
}
ApplicationPreparedEvent
public class ApplicationPreparedEventListener implements ApplicationListener<ApplicationPreparedEvent> {
@Override
public void onApplicationEvent(ApplicationPreparedEvent applicationPreparedEvent) {
System.out.println("============>>>>> applicationPreparedEvent is trigged");
System.out.println(applicationPreparedEvent.getTimestamp());
System.out.println("============>>>>> End");
}
}
ApplicationStartedEvent
public class ApplicationStartedEventListener implements ApplicationListener<ApplicationStartedEvent> {
@Override
public void onApplicationEvent(ApplicationStartedEvent applicationStartedEvent) {
System.out.println("============>>>>> applicationStartedEvent is trigged");
System.out.println(applicationStartedEvent.getTimestamp());
System.out.println("============>>>>> End");
}
}
ApplicationReadyEvent
public class ApplicationReadyEventListener implements ApplicationListener<ApplicationReadyEvent> {
@Override
public void onApplicationEvent(ApplicationReadyEvent applicationReadyEvent) {
System.out.println("============>>>>> applicationReadyEvent is trigged");
System.out.println(applicationReadyEvent.getTimestamp());
System.out.println("============>>>>> End");
}
}
ApplicationFailedEvent
public class ApplicationFailedEventListener implements ApplicationListener<ApplicationFailedEvent> {
@Override
public void onApplicationEvent(ApplicationFailedEvent applicationFailedEvent) {
System.out.println("============>>>>> ApplicationFailedEvent is trigged");
System.out.println(applicationFailedEvent.getTimestamp());
System.out.println("============>>>>> End");
}
}
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转载请注明原文链接：SpringBoot Application事件监听的实现方案
转载请注明原文链接：SpringBoot Application事件监听的实现方案
