{"id":122912,"date":"2024-03-24T09:01:45","date_gmt":"2024-03-24T00:01:45","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/go%e8%a8%80%e8%aa%9e%e3%81%a7%e3%82%b3%e3%83%b3%e3%82%ab%e3%83%ac%e3%83%b3%e3%83%88%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%b7%e3%82%b9%e3%83%86%e3%83%a0\/"},"modified":"2024-04-04T16:45:30","modified_gmt":"2024-04-04T07:45:30","slug":"go%e8%a8%80%e8%aa%9e%e3%81%a7%e3%82%b3%e3%83%b3%e3%82%ab%e3%83%ac%e3%83%b3%e3%83%88%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%b7%e3%82%b9%e3%83%86%e3%83%a0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/go%e8%a8%80%e8%aa%9e%e3%81%a7%e3%82%b3%e3%83%b3%e3%82%ab%e3%83%ac%e3%83%b3%e3%83%88%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%b7%e3%82%b9%e3%83%86%e3%83%a0\/","title":{"rendered":"Go\u8a00\u8a9e\u3067\u30b3\u30f3\u30ab\u30ec\u30f3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u5272\u3068\u30d5\u30a1\u30a4\u30eb\u306e\u7d50\u5408\u306e\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>Go\u8a00\u8a9e\u3067\u306f\u3001goroutine\u3068\u30c1\u30e3\u30cd\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u30d5\u30a1\u30a4\u30eb\u5206\u5272\u3068\u30de\u30fc\u30b8\u306e\u4e26\u884c\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">package<\/span> main\r\n<span class=\"hljs-keyword\">import<\/span> (\r\n<span class=\"hljs-string\">\"fmt\"<\/span>\r\n<span class=\"hljs-string\">\"io\"<\/span>\r\n<span class=\"hljs-string\">\"os\"<\/span>\r\n<span class=\"hljs-string\">\"sync\"<\/span>\r\n)\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span><\/span> {\r\n<span class=\"hljs-comment\">\/\/ \u6307\u5b9a\u8f93\u5165\u6587\u4ef6\u548c\u8f93\u51fa\u6587\u4ef6\u7684\u8def\u5f84<\/span>\r\ninputPath := <span class=\"hljs-string\">\"input.txt\"<\/span>\r\noutputPath := <span class=\"hljs-string\">\"output.txt\"<\/span>\r\n<span class=\"hljs-comment\">\/\/ \u6307\u5b9a\u5207\u5272\u7684\u5757\u5927\u5c0f<\/span>\r\nchunkSize := <span class=\"hljs-number\">1024<\/span>\r\n<span class=\"hljs-comment\">\/\/ \u5207\u5272\u6587\u4ef6<\/span>\r\nerr := splitFile(inputPath, chunkSize)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\nfmt.Println(<span class=\"hljs-string\">\"\u6587\u4ef6\u5207\u5272\u5931\u8d25:\"<\/span>, err)\r\n<span class=\"hljs-keyword\">return<\/span>\r\n}\r\n<span class=\"hljs-comment\">\/\/ \u5408\u5e76\u6587\u4ef6<\/span>\r\nerr = mergeFiles(outputPath)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\nfmt.Println(<span class=\"hljs-string\">\"\u6587\u4ef6\u5408\u5e76\u5931\u8d25:\"<\/span>, err)\r\n<span class=\"hljs-keyword\">return<\/span>\r\n}\r\nfmt.Println(<span class=\"hljs-string\">\"\u6587\u4ef6\u5207\u5272\u548c\u5408\u5e76\u6210\u529f\"<\/span>)\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">splitFile<\/span><span class=\"hljs-params\">(inputPath <span class=\"hljs-type\">string<\/span>, chunkSize <span class=\"hljs-type\">int<\/span>)<\/span><\/span> <span class=\"hljs-type\">error<\/span> {\r\n<span class=\"hljs-comment\">\/\/ \u6253\u5f00\u8f93\u5165\u6587\u4ef6<\/span>\r\ninputFile, err := os.Open(inputPath)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-keyword\">return<\/span> err\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> inputFile.Close()\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u4e00\u4e2a\u7b49\u5f85\u7ec4\uff0c\u7528\u4e8e\u7b49\u5f85\u6240\u6709\u5207\u5272\u7684goroutine\u5b8c\u6210<\/span>\r\n<span class=\"hljs-keyword\">var<\/span> wg sync.WaitGroup\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u4e00\u4e2a\u6709\u7f13\u51b2\u7684channel\uff0c\u7528\u4e8e\u5c06\u5207\u5272\u7684\u5757\u5199\u5165channel<\/span>\r\nchunks := <span class=\"hljs-built_in\">make<\/span>(<span class=\"hljs-keyword\">chan<\/span> []<span class=\"hljs-type\">byte<\/span>, <span class=\"hljs-number\">100<\/span>)\r\n<span class=\"hljs-comment\">\/\/ \u8bfb\u53d6\u8f93\u5165\u6587\u4ef6\uff0c\u5e76\u5c06\u5207\u5272\u7684\u5757\u5199\u5165channel<\/span>\r\n<span class=\"hljs-keyword\">go<\/span> <span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span><span class=\"hljs-params\">()<\/span><\/span> {\r\n<span class=\"hljs-keyword\">for<\/span> {\r\nbuffer := <span class=\"hljs-built_in\">make<\/span>([]<span class=\"hljs-type\">byte<\/span>, chunkSize)\r\nn, err := inputFile.Read(buffer)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> &amp;&amp; err != io.EOF {\r\nfmt.Println(<span class=\"hljs-string\">\"\u8bfb\u53d6\u8f93\u5165\u6587\u4ef6\u5931\u8d25:\"<\/span>, err)\r\n<span class=\"hljs-built_in\">close<\/span>(chunks)\r\n<span class=\"hljs-keyword\">return<\/span>\r\n}\r\n<span class=\"hljs-keyword\">if<\/span> n == <span class=\"hljs-number\">0<\/span> {\r\n<span class=\"hljs-keyword\">break<\/span>\r\n}\r\nchunks &lt;- buffer[:n]\r\n}\r\n<span class=\"hljs-built_in\">close<\/span>(chunks)\r\n}()\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u5207\u5272\u7684\u6587\u4ef6<\/span>\r\nfileIndex := <span class=\"hljs-number\">0<\/span>\r\n<span class=\"hljs-keyword\">for<\/span> chunk := <span class=\"hljs-keyword\">range<\/span> chunks {\r\nwg.Add(<span class=\"hljs-number\">1<\/span>)\r\nfileIndex++\r\n<span class=\"hljs-keyword\">go<\/span> <span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span><span class=\"hljs-params\">(chunk []<span class=\"hljs-type\">byte<\/span>, fileIndex <span class=\"hljs-type\">int<\/span>)<\/span><\/span> {\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u5207\u5272\u7684\u6587\u4ef6<\/span>\r\noutputPath := fmt.Sprintf(<span class=\"hljs-string\">\"chunk_%d.txt\"<\/span>, fileIndex)\r\noutputFile, err := os.Create(outputPath)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\nfmt.Printf(<span class=\"hljs-string\">\"\u521b\u5efa\u5207\u5272\u6587\u4ef6\u5931\u8d25\uff1a%s, %v\\n\"<\/span>, outputPath, err)\r\nwg.Done()\r\n<span class=\"hljs-keyword\">return<\/span>\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> outputFile.Close()\r\n<span class=\"hljs-comment\">\/\/ \u5199\u5165\u5207\u5272\u7684\u5757\u5230\u6587\u4ef6<\/span>\r\n_, err = outputFile.Write(chunk)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\nfmt.Printf(<span class=\"hljs-string\">\"\u5199\u5165\u5207\u5272\u6587\u4ef6\u5931\u8d25\uff1a%s, %v\\n\"<\/span>, outputPath, err)\r\n}\r\nwg.Done()\r\n}(chunk, fileIndex)\r\n}\r\n<span class=\"hljs-comment\">\/\/ \u7b49\u5f85\u6240\u6709\u5207\u5272\u7684goroutine\u5b8c\u6210<\/span>\r\nwg.Wait()\r\n<span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-literal\">nil<\/span>\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">mergeFiles<\/span><span class=\"hljs-params\">(outputPath <span class=\"hljs-type\">string<\/span>)<\/span><\/span> <span class=\"hljs-type\">error<\/span> {\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u8f93\u51fa\u6587\u4ef6<\/span>\r\noutputFile, err := os.Create(outputPath)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-keyword\">return<\/span> err\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> outputFile.Close()\r\n<span class=\"hljs-comment\">\/\/ \u83b7\u53d6\u5f53\u524d\u76ee\u5f55\u4e0b\u6240\u6709\u5207\u5272\u7684\u6587\u4ef6<\/span>\r\nfiles, err := getFileList()\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-keyword\">return<\/span> err\r\n}\r\n<span class=\"hljs-comment\">\/\/ \u8bfb\u53d6\u6bcf\u4e2a\u5207\u5272\u7684\u6587\u4ef6\uff0c\u5e76\u5c06\u5185\u5bb9\u5199\u5165\u8f93\u51fa\u6587\u4ef6<\/span>\r\n<span class=\"hljs-keyword\">for<\/span> _, file := <span class=\"hljs-keyword\">range<\/span> files {\r\ninputFile, err := os.Open(file)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-keyword\">return<\/span> err\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> inputFile.Close()\r\n_, err = io.Copy(outputFile, inputFile)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-keyword\">return<\/span> err\r\n}\r\n}\r\n<span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-literal\">nil<\/span>\r\n}\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">func<\/span> <span class=\"hljs-title\">getFileList<\/span><span class=\"hljs-params\">()<\/span><\/span> ([]<span class=\"hljs-type\">string<\/span>, <span class=\"hljs-type\">error<\/span>) {\r\nfiles := []<span class=\"hljs-type\">string<\/span>{}\r\ndir, err := os.Open(<span class=\"hljs-string\">\".\"<\/span>)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-keyword\">return<\/span> files, err\r\n}\r\n<span class=\"hljs-keyword\">defer<\/span> dir.Close()\r\nfileInfos, err := dir.Readdir(<span class=\"hljs-number\">-1<\/span>)\r\n<span class=\"hljs-keyword\">if<\/span> err != <span class=\"hljs-literal\">nil<\/span> {\r\n<span class=\"hljs-keyword\">return<\/span> files, err\r\n}\r\n<span class=\"hljs-keyword\">for<\/span> _, fileInfo := <span class=\"hljs-keyword\">range<\/span> fileInfos {\r\n<span class=\"hljs-keyword\">if<\/span> !fileInfo.IsDir() {\r\nfiles = <span class=\"hljs-built_in\">append<\/span>(files, fileInfo.Name())\r\n}\r\n}\r\n<span class=\"hljs-keyword\">return<\/span> files, <span class=\"hljs-literal\">nil<\/span>\r\n}\r\n<\/code><\/pre>\n<p>\u6700\u521d\u306b\u3001\u5165\u529b\u30d5\u30a1\u30a4\u30eb\u3068\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\u304c\u5b9a\u7fa9\u3055\u308c\u3001\u30c1\u30e3\u30f3\u30af\u306e\u30b5\u30a4\u30ba\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u6b21\u306b\u3001splitFile \u95a2\u6570\u3092\u4f7f\u3063\u3066\u5165\u529b\u30d5\u30a1\u30a4\u30eb\u3092\u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u3067\u5206\u5272\u3057\u3001goroutine \u3068\u30c1\u30e3\u30cd\u30eb\u3092\u4f7f\u3063\u3066\u4e26\u5217\u51e6\u7406\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3046\u3061\u3001splitFile \u95a2\u6570\u5185\u306e goroutine \u306f\u5165\u529b\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u53d6\u308a\u3068\u30c1\u30e3\u30f3\u30af\u5358\u4f4d\u3067\u306e\u30c1\u30e3\u30cd\u30eb\u3078\u306e\u66f8\u304d\u8fbc\u307f\u3092\u62c5\u5f53\u3057\u3001\u305d\u306e\u4ed6\u306e goroutine \u306f\u30c1\u30e3\u30cd\u30eb\u304b\u3089\u30c1\u30e3\u30f3\u30af\u3092\u8aad\u307f\u53d6<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Go\u8a00\u8a9e\u3067\u306f\u3001goroutine\u3068\u30c1\u30e3\u30cd\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u30d5\u30a1\u30a4\u30eb\u5206\u5272\u3068\u30de\u30fc\u30b8\u306e\u4e26\u884c\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002 package main import ( &#8220;fm [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-122912","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) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Go\u8a00\u8a9e\u3067\u30b3\u30f3\u30ab\u30ec\u30f3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u5272\u3068\u30d5\u30a1\u30a4\u30eb\u306e\u7d50\u5408\u306e\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/go\u8a00\u8a9e\u3067\u30b3\u30f3\u30ab\u30ec\u30f3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Go\u8a00\u8a9e\u3067\u30b3\u30f3\u30ab\u30ec\u30f3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u5272\u3068\u30d5\u30a1\u30a4\u30eb\u306e\u7d50\u5408\u306e\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"Go\u8a00\u8a9e\u3067\u306f\u3001goroutine\u3068\u30c1\u30e3\u30cd\u30eb\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u30d5\u30a1\u30a4\u30eb\u5206\u5272\u3068\u30de\u30fc\u30b8\u306e\u4e26\u884c\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u793a\u3057\u307e\u3059\u3002 package main import ( &quot;fm [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/go\u8a00\u8a9e\u3067\u30b3\u30f3\u30ab\u30ec\u30f3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-24T00:01:45+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-04T07:45:30+00:00\" \/>\n<meta name=\"author\" content=\"\u5149, \u660e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u5149, \u660e\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" 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