一:Application 事件
(1)ApplicationStartingEvent
An ApplicationStartingEvent
is sent at the start of a run, but before any processing except the registration of listeners and initializers.
(2)ApplicationEnvironmentPreparedEvent
An ApplicationEnvironmentPreparedEvent is sent when the Environment to be used in the context is known, but before the context is created.
示例:
public class MyListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent> { @Override public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) { SpringApplication app = event.getSpringApplication(); // app.setBannerMode(Banner.Mode.OFF); System.out.println("#####MyListener found!#####"); } }
Application類中添加
@SpringBootApplication public class Application { public static void main(String[] args){ SpringApplication app = new SpringApplication(Application.class); app.addListeners(new MyListener()); app.run(args); } }
運行結果:
(3)ApplicationPreparedEvent
An ApplicationPreparedEvent
is sent just before the refresh is started, but after bean definitions have been loaded.
(4)ApplicationReadyEvent
An ApplicationReadyEvent
is sent after the refresh and any related callbacks have been processed to indicate the application is ready to service requests.
當Application啟動好后調用
示例:
public class MyListener implements ApplicationListener<ApplicationReadyEvent> { @Override public void onApplicationEvent(ApplicationReadyEvent event) { System.out.println("#####MyListener found!#####"); } }
運行結果位置:
(5)ApplicationFailedEvent
An ApplicationFailedEvent
is sent if there is an exception on startup.
這里舉了兩種事件的例子,其他3種事件可以通過改寫MyListener中參數調試。