{"id":202538,"date":"2025-05-22T08:21:40","date_gmt":"2025-05-22T00:21:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202538\/"},"modified":"2025-05-22T08:21:40","modified_gmt":"2025-05-22T00:21:40","slug":"lambda-%e8%a1%a8%e8%be%be%e5%bc%8f%e5%9c%a8%e5%88%9b%e5%bb%ba-java-%e4%ba%8b%e4%bb%b6%e5%a4%84%e7%90%86%e5%87%bd%e6%95%b0%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202538\/","title":{"rendered":"lambda \u8868\u8fbe\u5f0f\u5728\u521b\u5efa Java \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\u7684\u5e94\u7528"},"content":{"rendered":"

<\/b> <\/p>\n

lambda \u8868\u8fbe\u5f0f\u5728\u521b\u5efa Java \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\u7684\u5e94\u7528<\/h1>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\u300alambda \u8868\u8fbe\u5f0f\u5728\u521b\u5efa Java \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\u7684\u5e94\u7528\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\u5229\u7528 Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u8f7b\u91cf\u7ea7\u7684 Java \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\uff1aLambda \u8868\u8fbe\u5f0f\u5373\u533f\u540d\u51fd\u6570\uff0c\u53ef\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u6216\u8d4b\u503c\u7ed9\u53d8\u91cf\u3002\u4f7f\u7528 Consumer \u6216 Function \u7b49\u9884\u5b9a\u4e49\u63a5\u53e3\u53ef\u521b\u5efa\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u3002\u4f7f\u7528 AWS Lambda \u7ed3\u5408 Lambda \u8868\u8fbe\u5f0f\u53ef\u8f7b\u677e\u521b\u5efa\u548c\u90e8\u7f72\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\uff0c\u4ee5\u54cd\u5e94\u6765\u81ea S3 \u7b49\u670d\u52a1\u7684\u4e8b\u4ef6\u3002<\/p>\n

<\/p>\n

\u5229\u7528 Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u8f7b\u91cf\u7ea7\u7684 Java \u4e8b\u4ef6\u5904\u7406\u51fd\u6570<\/strong><\/p>\n

\u5f15\u8a00<\/strong><\/p>\n

\u5728\u73b0\u4ee3\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u4e8b\u4ef6\u5904\u7406\u5df2\u53d8\u5f97\u81f3\u5173\u91cd\u8981\u3002Lambda \u8868\u8fbe\u5f0f\u5728 Java \u4e2d\u4e3a\u521b\u5efa\u8f7b\u91cf\u7ea7\u3001\u9ad8\u6548\u7684\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5de5\u5177\u3002<\/p>\n

Lambda \u8868\u8fbe\u5f0f\u56de\u987e<\/strong><\/p>\n

Lambda \u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u533f\u540d\u51fd\u6570\uff0c\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u3001\u8d4b\u503c\u7ed9\u53d8\u91cf\u6216\u4f5c\u4e3a\u7ebf\u7a0b\u6267\u884c\u3002\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

(parameters) -> expression<\/pre>\n
\u521b\u5efa\u4e8b\u4ef6\u5904\u7406\u51fd\u6570<\/strong><\/p>\n
\u8981\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u9884 \u062a\u0639\u0631\u06cc\u0641\u7684\u63a5\u53e3\uff0c\u4f8b\u5982 Consumer<\/code> \u6216 Function<\/code>\u3002\u8fd9\u4e9b\u63a5\u53e3\u5b9a\u4e49\u4e86\u5177\u6709\u4e00\u4e2a\u53c2\u6570\u548c\u4e00\u4e2a\u8fd4\u56de\u7c7b\u578b\u7684\u65b9\u6cd5\u3002<\/p>\n
\u4f8b\u5982\uff0c\u4ee5\u4e0b Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u4e00\u4e2a\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\uff0c\u6253\u5370\u4f20\u5165\u5b57\u7b26\u4e32\uff1a<\/p>\n
Consumer<String> stringConsumer = (String str) -> System.out.println(str);<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8ba9\u6211\u4eec\u4f7f\u7528 AWS Lambda \u6765\u521b\u5efa\u548c\u90e8\u7f72\u4e00\u4e2a\u7b80\u5355\u7684 Lambda \u51fd\u6570\uff0c\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u5904\u7406\u6765\u81ea S3 \u7684\u4e8b\u4ef6\u3002<\/p>\n
1. \u8bbe\u7f6e Lambda \u51fd\u6570<\/strong><\/p>\n
\u524d\u5f80 AWS \u63a7\u5236\u53f0\u5e76\u9009\u62e9 Lambda \u51fd\u6570<\/strong>\u3002\u70b9\u51fb \u521b\u5efa\u51fd\u6570<\/strong>\uff0c\u9009\u62e9 \u4ece\u96f6\u5f00\u59cb<\/strong> \u5e76\u6307\u5b9a\u540d\u79f0\u548c\u8fd0\u884c\u65f6\u3002<\/p>\n
2. \u7f16\u5199\u5904\u7406\u7a0b\u5e8f\u4ee3\u7801<\/strong><\/p>\n
\u5728 \u4ee3\u7801\u7f16\u8f91\u5668<\/strong> \u4e2d\uff0c\u5c06\u4ee5\u4e0b\u4ee3\u7801\u7c98\u8d34\u5230 \u51fd\u6570\u5904\u7406\u7a0b\u5e8f<\/strong> \u5b57\u6bb5\u4e2d\uff1a<\/p>\n
import com.amazonaws.services.lambda.runtime.Context;\nimport com.amazonaws.services.lambda.runtime.RequestHandler;\n\npublic class S3Handler implements RequestHandler<S3Event, Integer> {\n\n    public Integer handleRequest(S3Event event, Context context) {\n        \/\/ \u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u6253\u5370 S3 \u4e8b\u4ef6\u8be6\u7ec6\u4fe1\u606f\n        event.getRecords().forEach(record -> System.out.println(record.getS3().toString()));\n        return 0;\n    }\n\n}<\/pre>\n
3. \u90e8\u7f72 Lambda \u51fd\u6570<\/strong><\/p>\n
\u4fdd\u5b58\u5e76\u90e8\u7f72 Lambda \u51fd\u6570\u3002<\/p>\n
4. \u6d4b\u8bd5 Lambda \u51fd\u6570<\/strong><\/p>\n
\u5c06\u6587\u4ef6\u4e0a\u4f20\u5230\u53d7\u76d1\u63a7\u7684 S3 \u5b58\u50a8\u6876\u4ee5\u89e6\u53d1 Lambda \u51fd\u6570\u3002\u5728 Lambda \u51fd\u6570\u63a7\u5236\u53f0\u4e2d\uff0c\u60a8\u5e94\u8be5\u4f1a\u770b\u5230 Lambda \u51fd\u6570\u7684\u65e5\u5fd7\uff0c\u663e\u793a S3 \u4e8b\u4ef6\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n
\u7ed3\u8bba<\/strong><\/p>\n
\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u521b\u5efa\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u662f\u4e00\u79cd\u6709\u6548\u4e14\u8f7b\u91cf\u7ea7\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u51cf\u5c11\u4ee3\u7801\u590d\u6742\u6027\u548c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0cLambda \u8868\u8fbe\u5f0f\u4f7f\u521b\u5efa\u53ef\u6269\u5c55\u548c\u54cd\u5e94\u7684\u4e8b\u4ef6\u9a71\u52a8\u7cfb\u7edf\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\u3002<\/p>\n
\u6587\u4e2d\u5173\u4e8ejava,lambda\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300alambda \u8868\u8fbe\u5f0f\u5728\u521b\u5efa Java \u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\u7684\u5e94\u7528\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
lambda \u8868\u8fbe\u5f0f\u5728\u521b\u5efa Ja...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-202538","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202538"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202538\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}