最近遇到一个需求需要在 Spring web service 启动之后立即执行，类似一个初始化的工作，搜出来有好多实现方式，稍微记录一下他们的区别
ApplicationListener
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| @Component
public class InitTraceSourceEventListener implements ApplicationListener<ApplicationReadyEvent> {
@Override
public void onApplicationEvent(ApplicationReadyEvent applicationReadyEvent) {
System.out.println("InitTraceSourceEventListener triggered...");
}
}
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或者
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| @Configuration
public class ProjectConfiguration {
private static final Logger log =
LoggerFactory.getLogger(ProjectConfiguration.class);
@EventListener(ApplicationReadyEvent.class)
public void doSomethingAfterStartup() {
log.info("hello world, I have just started up");
}
}
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SpringBootServletInitializer
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| @Configuration
@EnableAutoConfiguration
@ComponentScan
public class Application extends SpringBootServletInitializer {
@SuppressWarnings("resource")
public static void main(final String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);
context.getBean(Table.class).fillWithTestdata(); // <-- here
}
}
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@PostConstruct
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| @Component
public class Monitor {
@Autowired private SomeService service
@PostConstruct
public void init(){
}
}
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ApplicationRunner
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| import org.springframework.boot.ApplicationRunner;
@Component
public class ServerInitializer implements ApplicationRunner {
@Override
public void run(ApplicationArguments applicationArguments) throws Exception {
}
}
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CommandLineRunner
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| @Component
public class CommandLineAppStartupRunner implements CommandLineRunner {
private static final Logger logger = LoggerFactory.getLogger(CommandLineAppStartupRunner.class);
@Override
public void run(String...args) throws Exception {
logger.info("Application started with command-line arguments: {} . \n To kill this application, press Ctrl + C.", Arrays.toString(args));
}
}
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InitializingBean
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| @Component
class MyInitializingBean implements InitializingBean {
private static final Logger logger = ...;
@Override
public void afterPropertiesSet() throws Exception {
logger.info("InitializingBean#afterPropertiesSet()");
}
}
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