{"id":4069,"date":"2022-12-07T13:20:47","date_gmt":"2022-12-07T05:20:47","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=4069"},"modified":"2022-12-13T11:43:00","modified_gmt":"2022-12-13T03:43:00","slug":"spring-%e4%ba%8b%e4%bb%b6%e9%a9%b1%e5%8a%a8%e6%a8%a1%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=4069","title":{"rendered":"Spring \u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b<\/strong>"},"content":{"rendered":"\n

\u539f\u6587\uff1aSpring \u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b_51CTO\u535a\u5ba2_redis\u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b<\/a><\/p>\n\n\n\n

Spring\u4e8b\u52a1\u540c\u6b65\u5668\u4e0e\u4e8b\u52a1\u76d1\u542c\u5668 – \u590f\u5c14_717 – \u535a\u5ba2\u56ed (cnblogs.com)<\/a><\/p>\n\n\n\n

\u5f53\u6211\u51c6\u5907\u7528SpringEvent\u4f18\u96c5\u7684\u89e3\u8026\u65f6\uff0c\u8fde\u7eed\u4e24\u4e2abug\u628a\u6211\u641e\u61f5\u4e86 – \u6398\u91d1 (juejin.cn)<\/a><\/p>\n\n\n\n

\u4e4b\u524d\u4e86\u89e3\u4e86@EventListener\uff0c\u6709\u4e9b\u7591\u95ee\uff0c\u7ee7\u7eed\u53c2\u8003\u8fd9\u7bc7\u6587\u7ae0\u4e86\u89e3<\/p>\n\n\n\n

0x01\uff1aspring\u4e8b\u4ef6\u9a71\u52a8\u7ec4\u6210<\/p>\n\n\n\n

spring\u4e8b\u4ef6\u9a71\u52a8\u75313\u4e2a\u90e8\u5206\u7ec4\u6210<\/p>\n\n\n\n

ApplicationEvent\uff1a\u8868\u793a\u4e8b\u4ef6\u672c\u8eab\uff0c\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u9700\u8981\u7ee7\u627f\u8be5\u7c7b\u3002\u7528\u6765\u5b9a\u4e49\u4e8b\u4ef6<\/p>\n\n\n\n

ApplicationEventPublisherAware\uff1a\u4e8b\u4ef6\u53d1\u9001\u5668\uff0c\u9700\u8981\u5b9e\u73b0\u8be5\u63a5\u53e3\u3002\u4e3b\u8981\u7528\u6765\u53d1\u5e03\u4e8b\u4ef6\u3002ApplicationContext \u4e5f\u5b9e\u73b0\u4e86\u8be5\u63a5\u53e3\uff0c\u53ef\u4ee5\u7528\u4e8e\u53d1\u5e03\u4e8b\u4ef6\u3002<\/p>\n\n\n\n

Spring4.2\u4e4b\u540e\uff0cApplicationEventPublisher\u81ea\u52a8\u88ab\u6ce8\u5165\u5230\u5bb9\u5668\u4e2d\uff0c\u91c7\u7528 Autowired \u5373\u53ef\u83b7\u53d6\u3002<\/p>\n\n\n\n

ApplicationListener\uff1a\u4e8b\u4ef6\u76d1\u542c\u5668\u63a5\u53e3\u3002\u76d1\u542c\u7c7b\u5b9e\u73b0 ApplicationListener  \u91cconApplicationEvent\u65b9\u6cd5\u5373\u53ef\u3002<\/p>\n\n\n\n

\u5728 spring4.2 \u4ee5\u540e\u53ef\u4ee5\u4ee5\u66f4\u52a0\u7b80\u6d01\u7684\u65b9\u5f0f\u6765\u76d1\u542c event \u7684\u53d1\u5e03\uff0c\u76d1\u542c\u4e8b\u4ef6\u4e0d\u5fc5\u518d\u5b9e\u73b0 ApplicationListener \u63a5\u53e3\u4e86\uff0c\u53ea\u8981\u5728\u65b9\u6cd5\u4e0a\u6dfb\u52a0\u6ce8\u89e3 @EventListener\u5373\u53ef\u3002<\/p>\n\n\n\n

0x02\uff1a\u4f7f\u7528\u6b65\u9aa4\u8be6\u89e3<\/p>\n\n\n\n

Spring\u4e2d\u4f7f\u7528\u4e8b\u4ef6\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8981\u4ee5\u4e0b\u7684\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n

\u5b9a\u4e49\u4e8b\u4ef6\uff1a\u7ee7\u627f ApplicationEvent<\/p>\n\n\n\n

\u5b9a\u4e49\u76d1\u542c\uff1a\u8981\u4e48\u5b9e\u73b0 ApplicationListener \u63a5\u53e3\uff0c\u8981\u4e48\u5728\u65b9\u6cd5\u4e0a\u6dfb\u52a0 @EventListener \u6ce8\u89e3<\/p>\n\n\n\n

\u53d1\u5e03\u4e8b\u4ef6\uff1a\u8c03\u7528 ApplicationContext.publishEvent() \u6216\u8005 ApplicationEventPublisher.publishEvent()<\/p>\n\n\n\n

1\u3001\u5b9a\u4e49\u4e8b\u4ef6<\/p>\n\n\n\n

public class OrderCreateEvent extends ApplicationEvent { private final Order order; public OrderCreateEvent(Object source, Order order) { super(source); this.order = order; } public Order getOrder() { return order; }}
1.
 <\/p>\n\n\n\n

2\u3001\u53d1\u9001\u4e8b\u4ef6\uff1apublishEvent()\u65b9\u6cd5<\/p>\n\n\n\n

@Autowired private ApplicationEventPublisher applicationEventPublisher; public void save(Order order) { \/\/\u751f\u6210\u8ba2\u5355\u53f7 String orderNo = getOrderNo(); order.setOrderNo(orderNo); log.info(“\u8ba2\u5355\u4fdd\u5b58\u6210\u529f\uff1a” + order); \/\/\u53d1\u5e03\u8ba2\u5355\u521b\u5efa\u4e8b\u4ef6 applicationEventPublisher.publishEvent(new OrderCreateEvent(this, order)); }
1.
 <\/p>\n\n\n\n

3\u3001\u8ba2\u9605\u4e8b\u4ef6\uff08\u5b9e\u73b0\u89c2\u5bdf\u8005\u67092\u79cd\u65b9\u5f0f\uff09<\/p>\n\n\n\n

\u65b9\u5f0f\u4e00\uff1a\u5b9e\u73b0 ApplicationListener \u63a5\u53e3<\/p>\n\n\n\n

@Componentpublic class OrderCreateEventListener implements ApplicationListener { @Override public void onApplicationEvent(OrderCreateEvent event) { System.out.printf(“\u5b9e\u73b0ApplicationListener\u63a5\u53e3,\u76d1\u542cOrderCreateEvent\u4e8b\u4ef6”); }}
1.
\u65b9\u5f0f\u4e8c\uff1a\u901a\u8fc7@EventListener\u6ce8\u89e3,\u8be5\u4f1a\u6839\u636e\u65b9\u6cd5\u53c2\u6570\u7c7b\u578b\u6765\u81ea\u52a8\u76d1\u542c\u76f8\u5e94\u4e8b\u4ef6\u7684\u53d1\u5e03\u3002<\/p>\n\n\n\n

@Component@Slf4jpublic class OrderCreateEventListener { @EventListener (classes = {OrderCreateEvent.class}) \/\/classes\u5c5e\u6027\u6307\u5b9a\u5904\u7406\u4e8b\u4ef6\u7684\u7c7b\u578b @Async \/\/\u5f02\u6b65\u76d1\u542c @Order(0)\/\/\u4f7f\u7528order\u6307\u5b9a\u987a\u5e8f\uff0c\u8d8a\u5c0f\u4f18\u5148\u7ea7\u8d8a\u9ad8 public void eventListener(OrderCreateEvent event) { log.info(“\u901a\u8fc7\u6ce8\u89e3@EventListener\u548c@Async,\u5f02\u6b65\u76d1\u542cOrderCreateEvent\u4e8b\u4ef6,orderId:” + event.getOrder().getOrderNo()); }}
1.
 <\/p>\n\n\n\n

\u5982\u679c\u8981\u76d1\u542c\u591a\u4e2a\u4e8b\u4ef6\u7c7b\u578b\u7684\u53d1\u5e03\uff0c\u53ef\u4ee5\u5728@EventListener(classes = {FaceEvent.class, ArmEvent.class})\u6307\u5b9a\uff0cspring \u4f1a\u591a\u6b21\u8c03\u7528\u6b64\u65b9\u6cd5\u6765\u5904\u7406\u591a\u4e2a\u4e8b\u4ef6\u3002\u4f46\u662f\u6ce8\u610f\u6b64\u65f6\uff0c\u65b9\u6cd5\u53c2\u6570\u4e0d\u80fd\u6709\u591a\u4e2a\uff0c\u5426\u5219\u4f1a\u53d1\u751f\u8f6c\u6362\u5f02\u5e38\uff0c\u53ef\u4ee5\u5c06\u4f7f\u7528\u591a\u4e2a\u4e8b\u4ef6\u7684\u7236\u7c7b\u4f5c\u4e3a\u552f\u4e00\u7684\u65b9\u6cd5\u53c2\u6570\u6765\u63a5\u6536\u5904\u7406\u4e8b\u4ef6\uff0c\u4f46\u9664\u975e\u5fc5\u8981\u5426\u5219\u5e76\u4e0d\u63a8\u8350\u76d1\u542c\u591a\u4e2a\u4e8b\u4ef6\u7684\u53d1\u5e03\u3002<\/p>\n\n\n\n

\u5982\u679c\u6709\u591a\u4e2a\u76d1\u542c\u5668\u76d1\u542c\u540c\u4e00\u4e8b\u4ef6\uff0c\u53ef\u4ee5\u5728\u65b9\u6cd5\u4e0a\u4f7f\u7528 spring \u7684 @order \u6ce8\u89e3\u6765\u5b9a\u4e49\u591a\u4e2a\u76d1\u542c\u5668\u7684\u987a\u5e8f\uff0corder\u8d8a\u5c0f\uff0c\u4f18\u5148\u7ea7\u8d8a\u9ad8\u3002<\/p>\n\n\n\n

@EventListener \u8fd8\u6709\u4e00\u4e2a\u5c5e\u6027\uff0ccondition\uff08\uff09\u91cc\u53ef\u4ee5\u4f7f\u7528 SPEL \u8868\u8fbe\u5f0f\u6765\u8fc7\u6ee4\u76d1\u542c\u5230\u4e8b\u4ef6\uff0c\u5373\u53ea\u6709\u7b26\u5408\u67d0\u79cd\u6761\u4ef6\u7684\u624d\u8fdb\u884c\u63a5\u6536\u5904\u7406\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n

@EventListener(condition = “event.message == ‘message'”)
1.
\u76d1\u542c\u591a\u4e2a\u4e8b\u4ef6:<\/p>\n\n\n\n

@EventListener({FaceEvent.class,ArmEvent.class})public void onApplicationEvent3(Object event) { if(event instanceof FaceEvent){ LOGGER.info(“===> B \u6536\u5230\u4eba\u8138\u4e8b\u4ef6: {}”,((FaceEvent) event).getEventData()); }else if(event instanceof ArmEvent){ ArmEvent armEvent = (ArmEvent) event; LOGGER.info(“===> B \u6536\u5230\u81c2\u8180\u4e8b\u4ef6: {}”,armEvent.getEventData()); }}
1.
 <\/p>\n\n\n\n

\u6ce8\u610f\u4e8b\u9879<\/p>\n\n\n\n

\u4e8b\u4ef6\u6ca1\u8981\u5904\u7406\u7684\u76d1\u542c\u5668\uff0c\u5c31\u4f1a\u88ab\u629b\u5f03\u3002<\/p>\n\n\n\n

\u4e00\u4e2a\u4e8b\u4ef6\u53ef\u4ee5\u540c\u65f6\u88ab\u591a\u4e2a\u76d1\u542c\u5904\u7406\u7c7b\u76d1\u542c\u5904\u7406\u3002<\/p>\n\n\n\n

\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4e8b\u4ef6\u662f\u540c\u6b65\u7684\uff0c\u5373\u4e8b\u4ef6\u88ab publish \u540e\u4f1a\u7b49\u5f85 Listener \u7684\u5904\u7406\u3002\u5982\u679c\u53d1\u5e03\u4e8b\u4ef6\u5904\u7684\u4e1a\u52a1\u5b58\u5728\u4e8b\u52a1\uff0c\u76d1\u542c\u5668\u5904\u7406\u4e5f\u4f1a\u5728\u76f8\u540c\u7684\u4e8b\u52a1\u4e2d\u3002<\/p>\n\n\n\n

\u5982\u679c\u5bf9\u4e8e\u4e8b\u4ef6\u7684\u5904\u7406\u4e0d\u60f3\u53d7\u5230\u5f71\u54cd\uff0c\u53ef\u4ee5onApplicationEvent\u65b9\u6cd5\u4e0a\u52a0@Async\u652f\u6301\u5f02\u6b65\u6216\u8005\u5728\u6709@EventListener\u7684\u6ce8\u89e3\u65b9\u6cd5\u4e0a\u52a0\u4e0a@Async\u3002\u6ce8\uff1a\u542f\u52a8\u7c7b\u4e0a\u540c\u65f6\u8981\u52a0\u4e0a@EnableAsync<\/p>\n\n\n\n

\u5229\u7528@TransactionalEventListener\u5b9e\u73b0\u76d1\u542c\u4e8b\u4ef6\u65f6\u7684\u4e8b\u52a1\u9694\u79bb<\/p>\n\n\n\n

\u5f88\u591a\u65f6\u5019\uff0c\u53ea\u6709\u4e8b\u52a1\u63d0\u4ea4\u4e4b\u540e\u624d\u4f1a\u53d1\u5e03\u76f8\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u5176\u4ed6\u903b\u8f91\uff0c\u6bd4\u5982\u7528\u6237\u6ce8\u518c\u4e4b\u540e\uff0c\u53d1\u9001\u90ae\u4ef6\u6216\u8005\u77ed\u4fe1\u3002\u8fd9\u65f6\u5019\u5c31\u53ef\u4ee5\u7528\u6ce8\u89e3 @TransactionalEventListener\u3002<\/p>\n\n\n\n

@TransactionalEventListener \u548c @EventListener \u90fd\u53ef\u4ee5\u76d1\u542c\u4e8b\u4ef6\uff0c\u4f46\u524d\u8005\u53ef\u4ee5\u5bf9\u53d1\u5e03\u4e8b\u4ef6\u548c\u76d1\u542c\u4e8b\u4ef6\u8fdb\u884c\u4e00\u4e9b\u4e8b\u52a1\u4e0a\u7684\u9694\u79bb\u3002<\/p>\n\n\n\n

@TransactionalEventListener \u662f\u5bf9 @EventListener\u7684\u4e00\u4e2a\u6269\u5c55\uff0c\u5141\u8bb8\u5c06\u4e8b\u4ef6\u7684\u76d1\u542c\u5668\u7ed1\u5b9a\u5230\u4e8b\u52a1\u7684\u67d0\u4e2a\u9636\u6bb5\u3002\u53ef\u4ee5\u7ed1\u5b9a\u5230\u4ee5\u4e0b\u4e8b\u52a1\u9636\u6bb5\uff1a<\/p>\n\n\n\n

AFTER_COMMIT \uff08\u9ed8\u8ba4\uff09\uff1a\u4e8b\u52a1\u63d0\u4ea4\u540e<\/p>\n\n\n\n

AFTER_ROLLBACK \uff09\uff1a\u4e8b\u52a1\u56de\u6eda\u540e<\/p>\n\n\n\n

AFTER_COMPLETION \uff09\uff1a\u4e8b\u52a1\u5b8c\u6210\uff0c\u5305\u62ec\u63d0\u4ea4\u540e\u548c\u56de\u6eda\u540e<\/p>\n\n\n\n

BEFORE_COMMIT \uff09\uff1a\u4e8b\u52a1\u63d0\u4ea4\u524d<\/p>\n\n\n\n

@TransactionalEventListener \u6307\u4e0d\u548c\u53d1\u5e03\u4e8b\u4ef6\u7684\u65b9\u6cd5\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u5185\uff0c\u53d1\u5e03\u4e8b\u4ef6\u7684\u65b9\u6cd5\u4e8b\u52a1\u7ed3\u675f\u540e\u624d\u4f1a\u6267\u884c\u672c\u76d1\u542c\u65b9\u6cd5\uff0c\u76d1\u542c\u903b\u8f91\u5185\u53d1\u751f\u5f02\u5e38\u4e0d\u4f1a\u56de\u6eda\u53d1\u5e03\u4e8b\u4ef6\u65b9\u6cd5\u7684\u4e8b\u52a1\u3002<\/p>\n\n\n\n

@TransactionalEventListener\u6709\u4e00\u4e2a\u5c5e\u6027\u4e3a fallbackExecution\uff0c\u9ed8\u8ba4\u4e3a false\uff0c\u6307\u53d1\u5e03\u4e8b\u4ef6\u7684\u65b9\u6cd5\u6ca1\u6709\u4e8b\u52a1\u63a7\u5236\u65f6\uff0c\u76d1\u542c\u5668\u4e0d\u8fdb\u884c\u76d1\u542c\u4e8b\u4ef6\uff0c\u6b64\u4e3a\u9ed8\u8ba4\u60c5\u51b5\uff01 fallbackExecution=true\uff0c\u5219\u6307\u53d1\u5e03\u4e8b\u4ef6\u7684\u65b9\u6cd5\u6ca1\u6709\u4e8b\u52a1\u63a7\u5236\u65f6\uff0c\u76d1\u542c\u65b9\u6cd5\u4ecd\u53ef\u4ee5\u76d1\u542c\u4e8b\u4ef6\u8fdb\u884c\u5904\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u539f\u6587\uff1aSpring \u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b_51CTO\u535a\u5ba2_redis\u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b Spring\u4e8b\u52a1\u540c\u6b65\u5668\u4e0e\u4e8b\u52a1\u76d1\u542c\u5668 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4069"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4069"}],"version-history":[{"count":6,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4069\/revisions"}],"predecessor-version":[{"id":4084,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4069\/revisions\/4084"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4069"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4069"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}