延迟SpringBoot应用程序启动，直到数据库启动

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.boot.context.event.ApplicationStartedEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class YourApplication implements ApplicationListener<ApplicationStartedEvent> {

    @Autowired
    private ConfigurableApplicationContext context;

    @Bean
    public DatabaseInitializer databaseInitializer() {
        return new DatabaseInitializer();
    }

    public static void main(String[] args) {
        SpringApplication.run(YourApplication.class, args);
    }

    @Override
    public void onApplicationEvent(ApplicationStartedEvent event) {
        DatabaseInitializer databaseInitializer = context.getBean(DatabaseInitializer.class);
        databaseInitializer.initializeDatabase();
    }

    public static class DatabaseInitializer {
        public void initializeDatabase() {
            // 初始化数据库连接
        }
    }
}