{"id":77581,"date":"2024-03-20T18:40:02","date_gmt":"2024-03-20T09:40:02","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e5%b7%a8%e5%a4%a7%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%92%e3%83%90%e3%83%83%e3%83%81%e5%87%a6%e7%90%86%e3%81%a7%e8%aa%ad%e3%81%bf%e8%be%bc%e3%82%80%e6%96%b9%e6%b3%95\/"},"modified":"2025-08-11T22:07:17","modified_gmt":"2025-08-11T13:07:17","slug":"java%e3%81%a7%e5%b7%a8%e5%a4%a7%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%92%e3%83%90%e3%83%83%e3%83%81%e5%87%a6%e7%90%86%e3%81%a7%e8%aa%ad%e3%81%bf%e8%be%bc%e3%82%80%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e5%b7%a8%e5%a4%a7%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%92%e3%83%90%e3%83%83%e3%83%81%e5%87%a6%e7%90%86%e3%81%a7%e8%aa%ad%e3%81%bf%e8%be%bc%e3%82%80%e6%96%b9%e6%b3%95\/","title":{"rendered":"java\u3067\u5de8\u5927\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5"},"content":{"rendered":"<p>Java\u3067\u306f\u3001BufferedReader\u3067\u5927\u304d\u306a\u30d5\u30a1\u30a4\u30eb\u3092\u9010\u6b21\u7684\u306b\u8aad\u307f\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.io.BufferedReader;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.FileReader;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.IOException;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">ReadLargeFile<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">filePath<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"path_to_large_file.txt\"<\/span>;\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">batchSize<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">1000<\/span>; <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u6bcf\u6b21\u8bfb\u53d6\u7684\u884c\u6570<\/span>\r\n        \r\n        <span class=\"hljs-keyword\">try<\/span> (<span class=\"hljs-type\">BufferedReader<\/span> <span class=\"hljs-variable\">reader<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">BufferedReader<\/span>(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FileReader<\/span>(filePath))) {\r\n            String line;\r\n            <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">count<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>;\r\n            \r\n            <span class=\"hljs-keyword\">while<\/span> ((line = reader.readLine()) != <span class=\"hljs-literal\">null<\/span>) {\r\n                <span class=\"hljs-comment\">\/\/ \u5904\u7406\u6bcf\u4e00\u884c\u6570\u636e<\/span>\r\n                processLine(line);\r\n                \r\n                count++;\r\n                <span class=\"hljs-keyword\">if<\/span> (count == batchSize) {\r\n                    <span class=\"hljs-comment\">\/\/ \u8fbe\u5230\u6279\u6b21\u5927\u5c0f\u540e\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f8b\u5982\u5199\u5165\u6570\u636e\u5e93\u7b49<\/span>\r\n                    performBatchOperation();\r\n                    \r\n                    count = <span class=\"hljs-number\">0<\/span>; <span class=\"hljs-comment\">\/\/ \u91cd\u7f6e\u8ba1\u6570\u5668<\/span>\r\n                }\r\n            }\r\n            \r\n            <span class=\"hljs-comment\">\/\/ \u5904\u7406\u5269\u4f59\u7684\u6570\u636e<\/span>\r\n            <span class=\"hljs-keyword\">if<\/span> (count &gt; <span class=\"hljs-number\">0<\/span>) {\r\n                performBatchOperation();\r\n            }\r\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n    \r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">processLine<\/span><span class=\"hljs-params\">(String line)<\/span> {\r\n        <span class=\"hljs-comment\">\/\/ \u5904\u7406\u6bcf\u4e00\u884c\u6570\u636e\u7684\u903b\u8f91<\/span>\r\n        System.out.println(line);\r\n    }\r\n    \r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">performBatchOperation<\/span><span class=\"hljs-params\">()<\/span> {\r\n        <span class=\"hljs-comment\">\/\/ \u6267\u884c\u6279\u6b21\u64cd\u4f5c\u7684\u903b\u8f91<\/span>\r\n        System.out.println(<span class=\"hljs-string\">\"Performing batch operation\"<\/span>);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001path_to_large_file.txt\u3092\u5b9f\u969b\u306b\u8aad\u307f\u8fbc\u307f\u305f\u3044\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30d1\u30b9\u306b\u7f6e\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002 batchSize\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u4e00\u5ea6\u306b\u8aad\u307f\u8fbc\u3080\u884c\u6570\u3092\u5236\u5fa1\u3067\u304d\u307e\u3059\u3002 processLine\u30e1\u30bd\u30c3\u30c9\u3067\u3001\u5404\u30c7\u30fc\u30bf\u884c\u3092\u51e6\u7406\u3059\u308b\u72ec\u81ea\u306e\u30ed\u30b8\u30c3\u30af\u3092\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002 performBatchOperation\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u30c7\u30fc\u30bf\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u66f8\u304d\u8fbc\u3080\u306a\u3069\u3001\u30d0\u30c3\u30c1\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306e\u72ec\u81ea\u306e\u30ed\u30b8\u30c3\u30af\u3092\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>BufferedReader\u3067\u5927\u304d\u306a\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u3068\u304d\u306f\u3001try-with-resources\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u30ea\u30bd\u30fc\u30b9\u304c\u304d\u3061\u3093\u3068\u9589\u3058\u3089\u308c\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001BufferedReader\u3067\u5927\u304d\u306a\u30d5\u30a1\u30a4\u30eb\u3092\u9010\u6b21\u7684\u306b\u8aad\u307f\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002 import java.io.BufferedReader; import java.io. [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-77581","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"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>java\u3067\u5de8\u5927\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"java\u3067\u5de8\u5927\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\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\/java\u3067\u5de8\u5927\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"java\u3067\u5de8\u5927\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"java\u3067\u5de8\u5927\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u3067\u5de8\u5927\u30d5\u30a1\u30a4\u30eb\u3092\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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