{"id":47064,"date":"2022-11-18T08:51:30","date_gmt":"2023-07-28T18:44:57","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8spring-kafka%e7%9a%84kafkalistener%e9%80%9a%e8%bf%87%e6%96%b9%e6%b3%95%e6%88%96%e5%b1%9e%e6%80%a7%e6%9d%a5%e6%8c%87%e5%ae%9atopics%e7%ad%89%e3%80%82\/"},"modified":"2024-01-15T12:16:35","modified_gmt":"2024-01-15T04:16:35","slug":"%e4%bd%bf%e7%94%a8spring-kafka%e7%9a%84kafkalistener%e9%80%9a%e8%bf%87%e6%96%b9%e6%b3%95%e6%88%96%e5%b1%9e%e6%80%a7%e6%9d%a5%e6%8c%87%e5%ae%9atopics%e7%ad%89%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8spring-kafka%e7%9a%84kafkalistener%e9%80%9a%e8%bf%87%e6%96%b9%e6%b3%95%e6%88%96%e5%b1%9e%e6%80%a7%e6%9d%a5%e6%8c%87%e5%ae%9atopics%e7%ad%89%e3%80%82\/","title":{"rendered":"\u4f7f\u7528spring-kafka\u7684KafkaListener\u901a\u8fc7\u65b9\u6cd5\u6216\u5c5e\u6027\u6765\u6307\u5b9atopics\u7b49"},"content":{"rendered":"<p>\u5728Spring Kafka\u7684KafkaListener\u4e2d\uff0c\u901a\u5e38\u53ef\u4ee5\u901a\u8fc7\u5c5e\u6027\u6765\u6307\u5b9atopics\u7b49\u5185\u5bb9\uff0c\u4f46\u6709\u65f6\u5e0c\u671b\u80fd\u591f\u901a\u8fc7\u65b9\u6cd5\u6216\u5c5e\u6027\u52a8\u6001\u6307\u5b9a\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4e0ebeanRef\u7ed3\u5408\u4f7f\u7528\u6765\u5b9e\u73b0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">@Component<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">SampleConsumer<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">getMyTopic<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"s\">\"mytopic3\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n<span class=\"c1\">\/\/  public String myTopic = \"mytopic3\";<\/span>\r\n\r\n    <span class=\"nd\">@KafkaListener<\/span><span class=\"o\">(<\/span><span class=\"n\">topics<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"#{sample.myTopic}\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">beanRef<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"sample\"<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">processMessage<\/span><span class=\"o\">(<\/span>\r\n<\/code><\/pre>\n<p>\u5728beanRef\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u81ea\u5b9a\u4e49\u7684\u540d\u79f0\u6765\u6307\u4ee3\u8fd9\u4e2abean\u81ea\u8eab\uff08\u9ed8\u8ba4\u4e3a__listener\uff09\u3002\u8fd9\u6837\uff0c\u5728SpEL\u4e2d\u5c31\u53ef\u4ee5\u5f15\u7528\u8be5bean\uff0c\u4ece\u800c\u8c03\u7528\u5176\u65b9\u6cd5\u6216\u5c5e\u6027\u3002\u4e0a\u9762\u7684\u4f8b\u5b50\u662f\u901a\u8fc7#{sample.myTopic}\u6765\u8c03\u7528getMyTopic\u65b9\u6cd5\u3002\u540c\u65f6\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u88ab\u6ce8\u91ca\u6389\u7684myTopic\u5c5e\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Spring Kafka\u7684KafkaListener\u4e2d\uff0c\u901a\u5e38\u53ef\u4ee5\u901a\u8fc7\u5c5e\u6027\u6765\u6307\u5b9atopics\u7b49\u5185\u5bb9\uff0c\u4f46\u6709\u65f6\u5e0c\u671b [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47064","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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