项目概览:
StepExecutor:
@Component
@Slf4j
public class StepExecutor implements Runnable {
@Autowired
private HelloService helloService; @Override
public void run() {
log.info("1111111111111111,helloService={}",helloService);
try {
Thread.sleep(1000*10);
} catch (InterruptedException e) {
e.printStackTrace();
}
helloService.hello();
log.info("22222222222222222");
}
}
ApplicationStartup
public class ApplicationStartup implements ApplicationListener<ContextRefreshedEvent> {
@Override
public void onApplicationEvent(ContextRefreshedEvent event) {
ApplicationContext ac = event.getApplicationContext();
StepExecutor stepExecutor = ac.getBean(StepExecutor.class);
Thread thread = new Thread(stepExecutor);
thread.start();
}
}
Application
@SpringBootApplication
@ComponentScan(basePackages="com.ebc")
@EnableAutoConfiguration //必须加该注解,否则报:缺少ServletWebServerFactory bean
@Slf4j
public class Application {
public static void main(String[] args) {
SpringApplication app = new SpringApplication(Application.class);
app.setBannerMode(Banner.Mode.OFF);
app.addListeners(new ApplicationStartup());
app.run(args);
log.info("PortalApplication is success!");
}
}
HelloService
@Service
public class HelloService {
public void hello() {
Console.log("xxxxxxxxxxxxxxxxxxxxxx");
}
}
启动:
16:35:48,920:INFO - Starting ProtocolHandler ["http-nio-9021"]
16:35:48,921:INFO - 1111111111111111,helloService=com.ebc.service.HelloService@67ed3522
16:35:48,938:INFO - Using a shared selector for servlet write/read
16:35:48,961:INFO - Started Application in 3.92 seconds (JVM running for 4.959)
16:35:48,964:INFO - PortalApplication is success!
xxxxxxxxxxxxxxxxxxxxxx
16:35:58,945:INFO - 22222222222222222
总结:
等待spring注入了所有bean后才执行执行。意味着,启动时,可以使用spring托管的任意bean。
而@PostConstract,无法做到。