1、定時任務：純註解方式

@Configuration
@EnableScheduling
@Component
public class TaskConfig {
    //  定時任務：每天凌晨3點跑定時
    @Scheduled(cron = "0 0 3 * * ?")
    public void myTask() {
        System.out.println("定時任務啟動。。。。。。");
    }
}

2、非同步

         1）註解方式開啟非同步並設定非同步執行緒池引數

@Configuration
@EnableAsync
public class AsyncConfig {
    
 
/*
    此處成員變數應該使用@Value從配置中讀取
     */
    /** Set the ThreadPoolExecutor's core pool size. */
    private int corePoolSize = 10;
    /** Set the ThreadPoolExecutor's maximum pool size. */
    private int maxPoolSize = 200;
    /** Set the capacity for the ThreadPoolExecutor's BlockingQueue. */
    private int 
 
queueCapacity = 10;

    @Bean
    public Executor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(corePoolSize);
        executor.setMaxPoolSize(maxPoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.initialize()
 
;
        return executor;
    }
}

         2）測試非同步

@RequestMapping(value = "/api/async")
@RestController
public class AsyncController {

    @Autowired
    private AsyncTask asyncTask;

    @GetMapping(value = "/test")
    public String testAsync() {
        /*
            123-->非同步,132-->同步
         */
        System.out.println("1");
        asyncTask.async();
        System.out.println("2");
        return "test";
    }
}

@Component
public class AsyncTask {
    @Async
    public void async() {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("3");
    }

}