{"id":10006736,"date":"2022-10-26T15:23:26","date_gmt":"2022-10-26T07:23:26","guid":{"rendered":"https:\/\/ityet.com\/?p=10006736"},"modified":"2022-10-27T10:04:27","modified_gmt":"2022-10-27T02:04:27","slug":"spring-boot-%e5%b9%b6%e8%a1%8c%e4%bb%bb%e5%8a%a1%ef%bc%8c%e8%bf%99%e6%89%8d%e6%98%af%e4%bc%98%e9%9b%85%e7%9a%84%e5%ae%9e%e7%8e%b0%e6%96%b9%e5%bc%8f%ef%bc%81","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006736","title":{"rendered":"Spring Boot \u5e76\u884c\u4efb\u52a1\uff0c\u8fd9\u624d\u662f\u4f18\u96c5\u7684\u5b9e\u73b0\u65b9\u5f0f\uff01"},"content":{"rendered":"<p>Spring Boot \u7684\u5b9a\u65f6\u4efb\u52a1\uff1a<\/p>\n<h3>\u7b2c\u4e00\u79cd\uff1a\u628a\u53c2\u6570\u914d\u7f6e\u5230.properties\u6587\u4ef6\u4e2d\uff1a<\/h3>\n<p>\u4ee3\u7801\uff1a<\/p>\n<pre><code>package com.accord.task;\n \nimport java.text.SimpleDateFormat;\nimport java.util.Date;\n \nimport org.springframework.scheduling.annotation.Scheduled;\nimport org.springframework.stereotype.Component;\n \n\/**\n * \u4ece\u914d\u7f6e\u6587\u4ef6\u52a0\u8f7d\u4efb\u52a1\u4fe1\u606f\n * @author \u738b\u4e45\u5370\n *\/\n@Component\npublic class ScheduledTask {\n \n  private static final SimpleDateFormat dateFormat = new SimpleDateFormat(\"HH:mm:ss\");\n \n  \/\/@Scheduled(fixedDelayString = \"${jobs.fixedDelay}\")\n  @Scheduled(fixedDelayString = \"2000\")\n  public void getTask1() {\n    System.out.println(\"\u4efb\u52a11,\u4ece\u914d\u7f6e\u6587\u4ef6\u52a0\u8f7d\u4efb\u52a1\u4fe1\u606f\uff0c\u5f53\u524d\u65f6\u95f4\uff1a\" + dateFormat.format(new Date()));\n  }\n \n  @Scheduled(cron = \"${jobs.cron}\")\n  public void getTask2() {\n    System.out.println(\"\u4efb\u52a12,\u4ece\u914d\u7f6e\u6587\u4ef6\u52a0\u8f7d\u4efb\u52a1\u4fe1\u606f\uff0c\u5f53\u524d\u65f6\u95f4\uff1a\" + dateFormat.format(new Date()));\n  }\n}<\/code><\/pre>\n<p>application.properties\u6587\u4ef6\uff1a<\/p>\n<pre><code>jobs.fixedDelay=5000\njobs.cron=0\/5 * *  * * ?<\/code><\/pre>\n<p>SpringBootCron2Application.java\u4e2d\uff1a<\/p>\n<pre><code>package com.accord;\n \nimport org.springframework.boot.SpringApplication;\nimport org.springframework.boot.autoconfigure.SpringBootApplication;\nimport org.springframework.scheduling.annotation.EnableScheduling;\n \n@SpringBootApplication\n@EnableScheduling\npublic class SpringBootCron2Application {\n public static void main(String[] args) {\n  SpringApplication.run(SpringBootCron2Application.class, args);\n }\n}<\/code><\/pre>\n<p>Spring Boot \u57fa\u7840\u5c31\u4e0d\u4ecb\u7ecd\u4e86\uff0c\u63a8\u8350\u770b\u8fd9\u4e2a\u514d\u8d39\u6559\u7a0b\uff1a<\/p>\n<blockquote><p><a href=\"https:\/\/link.segmentfault.com\/?enc=MB5a6yspcfj9EcLanGydUw%3D%3D.RGeVraFIRelgoNsxvH1ozU3np0k8ff%2B9m%2F6AgcEZO6rj465eExeBLi89Yn0NCNZhMEkDh8mZFQk9x6ElBqveAw%3D%3D\" rel=\"nofollow\">https:\/\/github.com\/javastacks\/spring-boot-best-practice<\/a><\/p><\/blockquote>\n<p>\u6ce8\uff1a@EnableScheduling \u8fd9\u4e2a\u4e00\u5b9a\u8981\u52a0\u4e0a\uff1b\u5426\u5219\uff0c\u4e0d\u4f1a\u5b9a\u65f6\u542f\u52a8\u4efb\u52a1\uff01<\/p>\n<p>@Scheduled\u4e2d\u7684\u53c2\u6570\u8bf4\u660e\uff1a<\/p>\n<ul>\n<li><code>@Scheduled(fixedRate=2000)<\/code>\uff1a\u4e0a\u4e00\u6b21\u5f00\u59cb\u6267\u884c\u65f6\u95f4\u70b9\u540e2\u79d2\u518d\u6b21\u6267\u884c\uff1b<\/li>\n<li><code>@Scheduled(fixedDelay=2000)<\/code>\uff1a\u4e0a\u4e00\u6b21\u6267\u884c\u5b8c\u6bd5\u65f6\u95f4\u70b9\u540e2\u79d2\u518d\u6b21\u6267\u884c\uff1b<\/li>\n<li><code>@Scheduled(initialDelay=1000, fixedDelay=2000)<\/code>\uff1a\u7b2c\u4e00\u6b21\u5ef6\u8fdf1\u79d2\u6267\u884c\uff0c\u7136\u540e\u5728\u4e0a\u4e00\u6b21\u6267\u884c\u5b8c\u6bd5\u65f6\u95f4\u70b9\u540e2\u79d2\u518d\u6b21\u6267\u884c\uff1b<\/li>\n<li><code>@Scheduled(cron=\"* * * * * ?\")<\/code>\uff1a\u6309cron\u89c4\u5219\u6267\u884c\u3002<\/li>\n<\/ul>\n<h3>\u7b2c\u4e8c\u79cd\u5b9a\u65f6\u4efb\u52a1\uff1a\u5355\u7ebf\u7a0b\u548c\u591a\u7ebf\u7a0b<\/h3>\n<h4>1\u3001\u521b\u5efa\u5b9a\u65f6\u4efb\u52a1\uff1a<\/h4>\n<pre><code>package com.accord.task;\n \nimport org.slf4j.Logger;\nimport org.slf4j.LoggerFactory;\nimport org.springframework.scheduling.annotation.Scheduled;\nimport org.springframework.stereotype.Component;\n \n\/**\n * \u6784\u5efa\u6267\u884c\u5b9a\u65f6\u4efb\u52a1\n * @author \u738b\u4e45\u5370\n * TODO\n *\/\n@Component\npublic class ScheduledTask2 {\n \n    private Logger logger = LoggerFactory.getLogger(ScheduledTask2.class);\n \n    private int fixedDelayCount = 1;\n    private int fixedRateCount = 1;\n    private int initialDelayCount = 1;\n    private int cronCount = 1;\n \n    @Scheduled(fixedDelay = 5000)        \/\/fixedDelay = 5000\u8868\u793a\u5f53\u524d\u65b9\u6cd5\u6267\u884c\u5b8c\u6bd55000ms\u540e\uff0cSpring scheduling\u4f1a\u518d\u6b21\u8c03\u7528\u8be5\u65b9\u6cd5\n    public void testFixDelay() {\n        logger.info(\"===fixedDelay: \u7b2c{}\u6b21\u6267\u884c\u65b9\u6cd5\", fixedDelayCount++);\n    }\n \n    @Scheduled(fixedRate = 5000)        \/\/fixedRate = 5000\u8868\u793a\u5f53\u524d\u65b9\u6cd5\u5f00\u59cb\u6267\u884c5000ms\u540e\uff0cSpring scheduling\u4f1a\u518d\u6b21\u8c03\u7528\u8be5\u65b9\u6cd5\n    public void testFixedRate() {\n        logger.info(\"===fixedRate: \u7b2c{}\u6b21\u6267\u884c\u65b9\u6cd5\", fixedRateCount++);\n    }\n \n    @Scheduled(initialDelay = 1000, fixedRate = 5000)   \/\/initialDelay = 1000\u8868\u793a\u5ef6\u8fdf1000ms\u6267\u884c\u7b2c\u4e00\u6b21\u4efb\u52a1\n    public void testInitialDelay() {\n        logger.info(\"===initialDelay: \u7b2c{}\u6b21\u6267\u884c\u65b9\u6cd5\", initialDelayCount++);\n    }\n \n    @Scheduled(cron = \"0 0\/1 * * * ?\")  \/\/cron\u63a5\u53d7cron\u8868\u8fbe\u5f0f\uff0c\u6839\u636ecron\u8868\u8fbe\u5f0f\u786e\u5b9a\u5b9a\u65f6\u89c4\u5219\n    public void testCron() {\n        logger.info(\"===initialDelay: \u7b2c{}\u6b21\u6267\u884c\u65b9\u6cd5\", cronCount++);\n    }\n \n}<\/code><\/pre>\n<p>\u4f7f\u7528 @Scheduled\u6765\u521b\u5efa\u5b9a\u65f6\u4efb\u52a1 \u8fd9\u4e2a\u6ce8\u89e3\u7528\u6765\u6807\u6ce8\u4e00\u4e2a\u5b9a\u65f6\u4efb\u52a1\u65b9\u6cd5\u3002<\/p>\n<p>\u901a\u8fc7\u770b @Scheduled\u6e90\u7801\u53ef\u4ee5\u770b\u51fa\u5b83\u652f\u6301\u591a\u79cd\u53c2\u6570\uff1a<\/p>\n<ul>\n<li>cron\uff1acron\u8868\u8fbe\u5f0f\uff0c\u6307\u5b9a\u4efb\u52a1\u5728\u7279\u5b9a\u65f6\u95f4\u6267\u884c\uff1b<\/li>\n<li>fixedDelay\uff1a\u8868\u793a\u4e0a\u4e00\u6b21\u4efb\u52a1\u6267\u884c\u5b8c\u6210\u540e\u591a\u4e45\u518d\u6b21\u6267\u884c\uff0c\u53c2\u6570\u7c7b\u578b\u4e3along\uff0c\u5355\u4f4dms\uff1b<\/li>\n<li>fixedDelayString\uff1a\u4e0efixedDelay\u542b\u4e49\u4e00\u6837\uff0c\u53ea\u662f\u53c2\u6570\u7c7b\u578b\u53d8\u4e3aString\uff1b<\/li>\n<li>fixedRate\uff1a\u8868\u793a\u6309\u4e00\u5b9a\u7684\u9891\u7387\u6267\u884c\u4efb\u52a1\uff0c\u53c2\u6570\u7c7b\u578b\u4e3along\uff0c\u5355\u4f4dms\uff1b<\/li>\n<li>fixedRateString: \u4e0efixedRate\u7684\u542b\u4e49\u4e00\u6837\uff0c\u53ea\u662f\u5c06\u53c2\u6570\u7c7b\u578b\u53d8\u4e3aString\uff1b<\/li>\n<li>initialDelay\uff1a\u8868\u793a\u5ef6\u8fdf\u591a\u4e45\u518d\u7b2c\u4e00\u6b21\u6267\u884c\u4efb\u52a1\uff0c\u53c2\u6570\u7c7b\u578b\u4e3along\uff0c\u5355\u4f4dms\uff1b<\/li>\n<li>initialDelayString\uff1a\u4e0einitialDelay\u7684\u542b\u4e49\u4e00\u6837\uff0c\u53ea\u662f\u5c06\u53c2\u6570\u7c7b\u578b\u53d8\u4e3aString\uff1b<\/li>\n<li>zone\uff1a\u65f6\u533a\uff0c\u9ed8\u8ba4\u4e3a\u5f53\u524d\u65f6\u533a\uff0c\u4e00\u822c\u6ca1\u6709\u7528\u5230\u3002<\/li>\n<li><\/li>\n<\/ul>\n<h4>2\u3001\u5f00\u542f\u5b9a\u65f6\u4efb\u52a1\uff1a<\/h4>\n<pre><code>package com.accord;\n \nimport org.springframework.boot.SpringApplication;\nimport org.springframework.boot.autoconfigure.SpringBootApplication;\nimport org.springframework.scheduling.annotation.EnableScheduling;\n \n@SpringBootApplication\n@EnableScheduling\npublic class SpringBootCron2Application {\n public static void main(String[] args) {\n  SpringApplication.run(SpringBootCron2Application.class, args);\n }\n}<\/code><\/pre>\n<blockquote><p>\u6ce8\uff1a\u8fd9\u91cc\u7684 @EnableScheduling \u6ce8\u89e3\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u53d1\u73b0\u6ce8\u89e3 @Scheduled\u7684\u4efb\u52a1\u5e76\u7531\u540e\u53f0\u6267\u884c\u3002\u6ca1\u6709\u5b83\u7684\u8bdd\u5c06\u65e0\u6cd5\u6267\u884c\u5b9a\u65f6\u4efb\u52a1\u3002<\/p><\/blockquote>\n<p>\u5f15\u7528\u5b98\u65b9\u6587\u6863\u539f\u6587\uff1a<\/p>\n<blockquote><p>@EnableScheduling ensures that a background task executor is created. Without it, nothing gets scheduled.<\/p><\/blockquote>\n<h4>3\u3001\u6267\u884c\u7ed3\u679c\uff08\u5355\u7ebf\u7a0b\uff09<\/h4>\n<p>\u5c31\u5b8c\u6210\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u5b9a\u65f6\u4efb\u52a1\u6a21\u578b\uff0c\u4e0b\u9762\u6267\u884cspringBoot\u89c2\u5bdf\u6267\u884c\u7ed3\u679c\uff1a<\/p>\n<p><img decoding=\"async\" title=\"\" src=\"https:\/\/segmentfault.com\/img\/bVc3h1d\" alt=\"\" \/><\/p>\n<p>\u4ece\u63a7\u5236\u53f0\u8f93\u5165\u7684\u7ed3\u679c\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\u6240\u6709\u7684\u5b9a\u65f6\u4efb\u52a1\u90fd\u662f\u5728\u540c\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u7528\u540c\u4e00\u4e2a\u7ebf\u7a0b\u6765\u5904\u7406\u7684\uff0c\u90a3\u4e48\u6211\u4eec\u5982\u4f55\u6765\u5e76\u53d1\u7684\u5904\u7406\u5404\u5b9a\u65f6\u4efb\u52a1\u5462\uff0c\u8bf7\u7ee7\u7eed\u5411\u4e0b\u770b\u3002<\/p>\n<h4>4\u3001\u591a\u7ebf\u7a0b\u5904\u7406\u5b9a\u65f6\u4efb\u52a1\uff1a<\/h4>\n<p>\u770b\u5230\u63a7\u5236\u53f0\u8f93\u51fa\u7684\u7ed3\u679c\uff0c\u6240\u6709\u7684\u5b9a\u65f6\u4efb\u52a1\u90fd\u662f\u901a\u8fc7\u4e00\u4e2a\u7ebf\u7a0b\u6765\u5904\u7406\u7684\uff0c\u6211\u4f30\u8ba1\u662f\u5728\u5b9a\u65f6\u4efb\u52a1\u7684\u914d\u7f6e\u4e2d\u8bbe\u5b9a\u4e86\u4e00\u4e2a<code>SingleThreadScheduledExecutor<\/code>\uff0c\u4e8e\u662f\u6211\u770b\u4e86\u6e90\u7801\uff0c\u4ece<code>ScheduledAnnotationBeanPostProcessor<\/code>\u7c7b\u5f00\u59cb\u4e00\u8def\u627e\u4e0b\u53bb\u3002\u679c\u7136\uff0c\u5728<code>ScheduledTaskRegistrar<\/code>\uff08\u5b9a\u65f6\u4efb\u52a1\u6ce8\u518c\u7c7b\uff09\u4e2d\u7684<code>ScheduleTasks<\/code>\u4e2d\u53c8\u8fd9\u6837\u4e00\u6bb5\u5224\u65ad\uff1a<\/p>\n<pre><code>if (this.taskScheduler == null) {\n this.localExecutor = Executors.newSingleThreadScheduledExecutor();\n this.taskScheduler = new ConcurrentTaskScheduler(this.localExecutor);\n}<\/code><\/pre>\n<p>\u8fd9\u5c31\u8bf4\u660e\u5982\u679c<code>taskScheduler<\/code>\u4e3a\u7a7a\uff0c\u90a3\u4e48\u5c31\u7ed9\u5b9a\u65f6\u4efb\u52a1\u505a\u4e86\u4e00\u4e2a\u5355\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u6c60\uff0c\u6b63\u597d\u5728\u8fd9\u4e2a\u7c7b\u4e2d\u8fd8\u6709\u4e00\u4e2a\u8bbe\u7f6e<code>taskScheduler<\/code>\u7684\u65b9\u6cd5\uff1a<\/p>\n<pre><code>public void setScheduler(Object scheduler) {\n Assert.notNull(scheduler, \"Scheduler object must not be null\");\n if (scheduler instanceof TaskScheduler) {\n  this.taskScheduler = (TaskScheduler) scheduler;\n }\n else if (scheduler instanceof ScheduledExecutorService) {\n  this.taskScheduler = new ConcurrentTaskScheduler(((ScheduledExecutorService) scheduler));\n }\n else {\n  throw new IllegalArgumentException(\"Unsupported scheduler type: \" + scheduler.getClass());\n }\n}<\/code><\/pre>\n<p>\u8fd9\u6837\u95ee\u9898\u5c31\u5f88\u7b80\u5355\u4e86\uff0c\u6211\u4eec\u53ea\u9700\u7528\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u663e\u5f0f\u7684\u8bbe\u7f6e\u4e00\u4e2a<code>ScheduledExecutorService<\/code>\u5c31\u53ef\u4ee5\u8fbe\u5230\u5e76\u53d1\u7684\u6548\u679c\u4e86\u3002\u6211\u4eec\u8981\u505a\u7684\u4ec5\u4ec5\u662f\u5b9e\u73b0<code>SchedulingConfigurer<\/code>\u63a5\u53e3\uff0c\u91cd\u5199<code>configureTasks<\/code>\u65b9\u6cd5\u5c31OK\u4e86\uff1b<\/p>\n<pre><code>package com.accord.task;\n \nimport org.springframework.context.annotation.Configuration;\nimport org.springframework.scheduling.annotation.SchedulingConfigurer;\nimport org.springframework.scheduling.config.ScheduledTaskRegistrar;\n \nimport java.util.concurrent.Executors;\n \n\/**\n * \u591a\u7ebf\u7a0b\u6267\u884c\u5b9a\u65f6\u4efb\u52a1\n * @author \u738b\u4e45\u5370\n *\/\n@Configuration\n\/\/\u6240\u6709\u7684\u5b9a\u65f6\u4efb\u52a1\u90fd\u653e\u5728\u4e00\u4e2a\u7ebf\u7a0b\u6c60\u4e2d\uff0c\u5b9a\u65f6\u4efb\u52a1\u542f\u52a8\u65f6\u4f7f\u7528\u4e0d\u540c\u90fd\u7ebf\u7a0b\u3002\npublic class ScheduleConfig implements SchedulingConfigurer {\n    @Override\n    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {\n        \/\/\u8bbe\u5b9a\u4e00\u4e2a\u957f\u5ea610\u7684\u5b9a\u65f6\u4efb\u52a1\u7ebf\u7a0b\u6c60\n        taskRegistrar.setScheduler(Executors.newScheduledThreadPool(10));\n    }\n}<\/code><\/pre>\n<h4>5\u3001\u6267\u884c\u7ed3\u679c\uff08\u5e76\u53d1\uff09<\/h4>\n<p><img decoding=\"async\" title=\"\" src=\"https:\/\/segmentfault.com\/img\/bVc3h1e\" alt=\"\" \/><\/p>\n<p>\u901a\u8fc7\u63a7\u5236\u53f0\u8f93\u51fa\u7684\u7ed3\u679c\u770b\u51fa\u6bcf\u4e2a\u5b9a\u65f6\u4efb\u52a1\u90fd\u662f\u5728\u901a\u8fc7\u4e0d\u540c\u7684\u7ebf\u7a0b\u6765\u5904\u7406\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spring Boot \u7684\u5b9a\u65f6\u4efb\u52a1\uff1a \u7b2c\u4e00\u79cd\uff1a\u628a\u53c2\u6570\u914d\u7f6e\u5230.properties\u6587\u4ef6\u4e2d\uff1a \u4ee3\u7801\uff1a packag [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10006736","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006736","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006736"}],"version-history":[{"count":1,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006736\/revisions"}],"predecessor-version":[{"id":10006744,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006736\/revisions\/10006744"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006736"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}