{"id":206282,"date":"2025-06-12T11:56:55","date_gmt":"2025-06-12T03:56:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206282\/"},"modified":"2025-06-12T11:56:55","modified_gmt":"2025-06-12T03:56:55","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88%e5%9c%a8-go-%e8%af%ad%e8%a8%80%e4%b8%ad%ef%bc%8c%e5%8d%b3%e4%bd%bf%e5%af%bc%e5%85%a5%e5%8c%85%e5%b9%b6%e4%bd%bf%e7%94%a8-init-%e5%87%bd%e6%95%b0%e5%88%9d%e5%a7%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206282\/","title":{"rendered":"\u4e3a\u4ec0\u4e48\u5728 Go \u8bed\u8a00\u4e2d\uff0c\u5373\u4f7f\u5bfc\u5165\u5305\u5e76\u4f7f\u7528 `init` \u51fd\u6570\u521d\u59cb\u5316\u4e86\u53d8\u91cf\uff0c\u4ecd\u7136\u65e0\u6cd5\u8bbf\u95ee\u8be5\u53d8\u91cf\uff1f"},"content":{"rendered":"

\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300a\u4e3a\u4ec0\u4e48\u5728 Go \u8bed\u8a00\u4e2d\uff0c\u5373\u4f7f\u5bfc\u5165\u5305\u5e76\u4f7f\u7528 `init` \u51fd\u6570\u521d\u59cb\u5316\u4e86\u53d8\u91cf\uff0c\u4ecd\u7136\u65e0\u6cd5\u8bbf\u95ee\u8be5\u53d8\u91cf\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8eGOLANG<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span>,
\n,
\ngo \u65e0\u6cd5\u8bbf\u95ee\u5bfc\u5165\u5305\u5bfc\u51fa\u53d8\u91cf\u7684\u539f\u56e0<\/strong>,\u5728 go \u8bed\u8a00\u4e2d\uff0c\u5bfc\u5165\u5305\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbf\u95ee\u5305\u4e2d\u5bfc\u51fa\u7684\u53d8\u91cf\u3002\u7136\u800c\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u80fd\u65e0\u6cd5\u8bbf\u95ee\u5bfc\u51fa\u7684\u53d8\u91cf\u3002\u672c\u6587\u5c06\u5206\u6790\u5bfc\u81f4\u8fd9\u79cd\u60c5\u51b5\u7684\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\u3002,\u8003\u8651\u4ee5\u4e0b\u88ab\u5bfc\u5165\u7684\u5305 utils\uff1a,init \u51fd\u6570\u521d\u59cb\u5316\u4e86 esclient \u53d8\u91cf\uff0c\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u4e00\u4e2a elasticsearch.client \u5b9e\u4f8b\u3002,\u73b0\u5728\uff0c\u8003\u8651\u4ee5\u4e0b main.go \u6587\u4ef6\uff1a,\u5728 main \u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u5c1d\u8bd5\u8bbf\u95ee utils \u5305\u4e2d\u5bfc\u51fa\u7684 esclient \u53d8\u91cf\u3002\u4f46\u662f\uff0c\u8f93\u51fa\u7ed3\u679c\u5374\u4e3a nil\u3002\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f,\u95ee\u9898\u7684\u539f\u56e0\u5728\u4e8e init \u51fd\u6570\u4e2d\u4f7f\u7528\u7684\u8d4b\u503c\u8fd0\u7b97\u7b26 :=\u3002\u5728 init \u51fd\u6570\u4e2d\uff0c\u5bf9 esclient \u53d8\u91cf\u4f7f\u7528 := \u8d4b\u503c\uff0c\u4f1a\u521b\u5efa\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u4fee\u6539\u5168\u5c40\u53d8\u91cf\u3002\u56e0\u6b64\uff0c\u5728 init \u51fd\u6570\u4e4b\u5916\uff0c\u5168\u5c40\u53d8\u91cf esclient \u7684\u503c\u4ecd\u7136\u4e3a nil\u3002,\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u5728 init \u51fd\u6570\u4e2d\u4f7f\u7528\u7b80\u5355\u7684\u8d4b\u503c\u8fd0\u7b97\u7b26 = \u6765\u4fee\u6539\u5168\u5c40\u53d8\u91cf\uff1a,\u8fd9\u6837\u4e00\u6765\uff0cutils \u5305\u7684 esclient \u53d8\u91cf\u5728\u6574\u4e2a\u7a0b\u5e8f\u4e2d\u90fd\u53ef\u4ee5\u8bbf\u95ee\u3002,\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301GOLANG\uff01\u66f4\u591a\u5173\u4e8eGOLANG\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\u3002,go \u65e0\u6cd5\u8bbf\u95ee\u5bfc\u5165\u5305\u5bfc\u51fa\u53d8\u91cf\u7684\u539f\u56e0,
\n\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300a\u4e3a\u4ec0\u4e48\u5728 Go \u8bed\u8a00\u4e2d\uff0c\u5373\u4f7f\u5bfc\u5165\u5305\u5e76\u4f7f\u7528 `init` \u51fd\u6570\u521d\u59cb\u5316\u4e86\u53d8\u91cf\uff0c\u4ecd\u7136\u65e0\u6cd5\u8bbf\u95ee\u8be5\u53d8\u91cf\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8eGOLANG<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span>,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4e3a\u4ec0\u4e48\u5728 Go \u8bed\u8a00\u4e2d\uff0c\u5373\u4f7f\u5bfc\u5165\u5305\u5e76\u4f7f\u7528 `init` \u51fd\u6570\u521d\u59cb\u5316\u4e86\u53d8\u91cf\uff0c\u4ecd\u7136\u65e0\u6cd5\u8bbf\u95ee\u8be5\u53d8\u91cf\uff1f<\/span><\/p>\n

\u4e3a\u4ec0\u4e48\u5728 Go \u8bed\u8a00\u4e2d\uff0c\u5373\u4f7f\u5bfc\u5165\u5305\u5e76\u4f7f\u7528 `init` \u51fd\u6570\u521d\u59cb\u5316\u4e86\u53d8\u91cf\uff0c\u4ecd\u7136\u65e0\u6cd5\u8bbf\u95ee\u8be5\u53d8\u91cf\uff1f<\/h1>\n

2024-11-08 15:22:04<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300a\u4e3a\u4ec0\u4e48\u5728 Go \u8bed\u8a00\u4e2d\uff0c\u5373\u4f7f\u5bfc\u5165\u5305\u5e76\u4f7f\u7528 `init` \u51fd\u6570\u521d\u59cb\u5316\u4e86\u53d8\u91cf\uff0c\u4ecd\u7136\u65e0\u6cd5\u8bbf\u95ee\u8be5\u53d8\u91cf\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8eGOLANG<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span><\/p>\n

<\/p>\n

go \u65e0\u6cd5\u8bbf\u95ee\u5bfc\u5165\u5305\u5bfc\u51fa\u53d8\u91cf\u7684\u539f\u56e0<\/strong><\/p>\n

\u5728 go \u8bed\u8a00\u4e2d\uff0c\u5bfc\u5165\u5305\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbf\u95ee\u5305\u4e2d\u5bfc\u51fa\u7684\u53d8\u91cf\u3002\u7136\u800c\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u80fd\u65e0\u6cd5\u8bbf\u95ee\u5bfc\u51fa\u7684\u53d8\u91cf\u3002\u672c\u6587\u5c06\u5206\u6790\u5bfc\u81f4\u8fd9\u79cd\u60c5\u51b5\u7684\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\u3002<\/p>\n

\u8003\u8651\u4ee5\u4e0b\u88ab\u5bfc\u5165\u7684\u5305 utils\uff1a<\/p>\n

package utils\n\nimport (\n    \"github.com\/elastic\/go-elasticsearch\/v6\"\n    \"log\"\n)\n\nvar esclient *elasticsearch.client\n\nfunc init() {\n    \/\/ ... \u7701\u7565\u521d\u59cb\u5316\u4ee3\u7801 ...\n}<\/pre>\n
init \u51fd\u6570\u521d\u59cb\u5316\u4e86 esclient \u53d8\u91cf\uff0c\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u4e00\u4e2a elasticsearch.client \u5b9e\u4f8b\u3002<\/p>\n
\u73b0\u5728\uff0c\u8003\u8651\u4ee5\u4e0b main.go \u6587\u4ef6\uff1a<\/p>\n
package main\n\nimport (\n    \"data_push\/utils\"\n    \"fmt\"\n)\n\nfunc main() {\n    fmt.println(utils.esclient) \/\/ \u8f93\u51fa\u4e3a nil\n}<\/pre>\n
\u5728 main \u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u5c1d\u8bd5\u8bbf\u95ee utils \u5305\u4e2d\u5bfc\u51fa\u7684 esclient \u53d8\u91cf\u3002\u4f46\u662f\uff0c\u8f93\u51fa\u7ed3\u679c\u5374\u4e3a nil\u3002\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f<\/p>\n
\u95ee\u9898\u7684\u539f\u56e0\u5728\u4e8e init \u51fd\u6570\u4e2d\u4f7f\u7528\u7684\u8d4b\u503c\u8fd0\u7b97\u7b26 :=\u3002\u5728 init \u51fd\u6570\u4e2d\uff0c\u5bf9 esclient \u53d8\u91cf\u4f7f\u7528 := \u8d4b\u503c\uff0c\u4f1a\u521b\u5efa\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u4fee\u6539\u5168\u5c40\u53d8\u91cf\u3002\u56e0\u6b64\uff0c\u5728 init \u51fd\u6570\u4e4b\u5916\uff0c\u5168\u5c40\u53d8\u91cf esclient \u7684\u503c\u4ecd\u7136\u4e3a nil\u3002<\/p>\n
\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u5728 init \u51fd\u6570\u4e2d\u4f7f\u7528\u7b80\u5355\u7684\u8d4b\u503c\u8fd0\u7b97\u7b26 = \u6765\u4fee\u6539\u5168\u5c40\u53d8\u91cf\uff1a<\/p>\n
func init() {\n    \/\/ ... \u7701\u7565\u521d\u59cb\u5316\u4ee3\u7801 ...\n    EsClient = ... \/\/ \u76f4\u63a5\u8d4b\u503c\u7ed9\u5168\u5c40\u53d8\u91cf\n}<\/pre>\n
\u8fd9\u6837\u4e00\u6765\uff0cutils \u5305\u7684 esclient \u53d8\u91cf\u5728\u6574\u4e2a\u7a0b\u5e8f\u4e2d\u90fd\u53ef\u4ee5\u8bbf\u95ee\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301GOLANG\uff01\u66f4\u591a\u5173\u4e8eGOLANG\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\u3002<\/p>\n
\n
\n <\/dt>\n
\n   \u5982\u4f55\u5229\u7528 SQL \u67e5\u8be2\u5c06\u8868\u4e2d\u6570\u636e\u5206\u7ec4\u5e76\u5e73\u884c\u5c55\u793a\u534a\u5e74\u7edf\u8ba1\u7ed3\u679c\uff1f\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   \u5982\u4f55\u4fdd\u8bc1\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u5b89\u5168\u5173\u95ed\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929...<\/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-206282","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206282","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=206282"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206282\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}