@EnableScheduling开启定时任务

@Target(ElementType.TYPE)@Retention(RetentionPolicy.RUNTIME)@Import(SchedulingConfiguration.class)@Documentedpublic @interface EnableScheduling {}

　　@Scheduled(cron = "0 0 */1 * * ?")配置执行方法及定时规则

@Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})@Retention(RetentionPolicy.RUNTIME)@Documented@Repeatable(Schedules.class)public @interface Scheduled {	/**	 * A special cron expression value that indicates a disabled trigger: {@value}.	 * 
This is primarily meant for use with ${...} placeholders, allowing for	 * external disabling of corresponding scheduled methods.	 * @since 5.1	 */	String CRON_DISABLED = "-";	/**	 * A cron-like expression, extending the usual UN*X definition to include triggers	 * on the second as well as minute, hour, day of month, month and day of week.	 * 
E.g. {@code "0 * * * * MON-FRI"} means once per minute on weekdays	 * (at the top of the minute - the 0th second).	 * 
The special value {@link #CRON_DISABLED "-"} indicates a disabled cron trigger,	 * primarily meant for externally specified values resolved by a ${...} placeholder.	 * @return an expression that can be parsed to a cron schedule	 * @see org.springframework.scheduling.support.CronSequenceGenerator	 */	String cron() default "";	/**	 * A time zone for which the cron expression will be resolved. By default, this	 * attribute is the empty String (i.e. the server's local time zone will be used).	 * @return a zone id accepted by {@link java.util.TimeZone#getTimeZone(String)},	 * or an empty String to indicate the server's default time zone	 * @since 4.0	 * @see org.springframework.scheduling.support.CronTrigger#CronTrigger(String, java.util.TimeZone)	 * @see java.util.TimeZone	 */	String zone() default "";	/**	 * Execute the annotated method with a fixed period in milliseconds between the	 * end of the last invocation and the start of the next.	 * @return the delay in milliseconds	 */	long fixedDelay() default -1;	/**	 * Execute the annotated method with a fixed period in milliseconds between the	 * end of the last invocation and the start of the next.	 * @return the delay in milliseconds as a String value, e.g. a placeholder	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value	 * @since 3.2.2	 */	String fixedDelayString() default "";	/**	 * Execute the annotated method with a fixed period in milliseconds between	 * invocations.	 * @return the period in milliseconds	 */	long fixedRate() default -1;	/**	 * Execute the annotated method with a fixed period in milliseconds between	 * invocations.	 * @return the period in milliseconds as a String value, e.g. a placeholder	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value	 * @since 3.2.2	 */	String fixedRateString() default "";	/**	 * Number of milliseconds to delay before the first execution of a	 * {@link #fixedRate()} or {@link #fixedDelay()} task.	 * @return the initial delay in milliseconds	 * @since 3.2	 */	long initialDelay() default -1;	/**	 * Number of milliseconds to delay before the first execution of a	 * {@link #fixedRate()} or {@link #fixedDelay()} task.	 * @return the initial delay in milliseconds as a String value, e.g. a placeholder	 * or a {@link java.time.Duration#parse java.time.Duration} compliant value	 * @since 3.2.2	 */	String initialDelayString() default "";}

执行规则：

详细文档见：

此定时任务无法做到负载均衡，因此使用时需根据实际情况选择