{"id":79935,"date":"2024-03-20T21:56:24","date_gmt":"2024-03-20T12:56:24","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/%e5%a4%a7%e9%87%8f%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e5%86%85%e5%ae%b9%e3%82%92java%e3%81%a7%e4%b8%80%e6%8b%ac%e5%a4%89%e6%9b%b4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2025-08-12T09:23:30","modified_gmt":"2025-08-12T00:23:30","slug":"%e5%a4%a7%e9%87%8f%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e5%86%85%e5%ae%b9%e3%82%92java%e3%81%a7%e4%b8%80%e6%8b%ac%e5%a4%89%e6%9b%b4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e5%a4%a7%e9%87%8f%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ae%e5%86%85%e5%ae%b9%e3%82%92java%e3%81%a7%e4%b8%80%e6%8b%ac%e5%a4%89%e6%9b%b4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u5927\u91cf\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092Java\u3067\u4e00\u62ec\u5909\u66f4\u306e\u65b9\u6cd5"},"content":{"rendered":"<p>Java\u3067\u306f\u3001\u4e0b\u8a18\u306e\u65b9\u6cd5\u3067\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u4e00\u62ec\u3067\u5909\u66f4\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>FileInputStream\u3068FileOutputStream\u3092\u4f7f\u3063\u3066\u3001\u5143\u306e\u30d5\u30a1\u30a4\u30eb\u3092FileInputStream\u3067\u8aad\u307f\u8fbc\u307f\u3001\u52a0\u5de5\u3057\u305f\u5185\u5bb9\u3092FileOutputStream\u3067\u65b0\u3057\u3044\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\u3002\u307e\u305f\u3001\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u5bfe\u3057\u3066\u306f\u3001\u30eb\u30fc\u30d7\u51e6\u7406\u3067\u8aad\u307f\u8fbc\u307f\u3068\u66f8\u304d\u51fa\u3057\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u5404\u30d5\u30a1\u30a4\u30eb\u306b\u5bfe\u3057\u3066\u52a0\u5de5\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.io.FileInputStream;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.FileOutputStream;\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_\">FileContentModifier<\/span> {\r\n\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_\">modifyFileContent<\/span><span class=\"hljs-params\">(String filePath)<\/span> <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-comment\">\/\/ \u8bfb\u53d6\u539f\u59cb\u6587\u4ef6\u5185\u5bb9<\/span>\r\n        <span class=\"hljs-type\">FileInputStream<\/span> <span class=\"hljs-variable\">fis<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FileInputStream<\/span>(filePath);\r\n        <span class=\"hljs-type\">byte<\/span>[] content = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">byte<\/span>[fis.available()];\r\n        fis.read(content);\r\n        fis.close();\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u4fee\u6539\u6587\u4ef6\u5185\u5bb9<\/span>\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">modifiedContent<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">String<\/span>(content);\r\n        modifiedContent = modifiedContent.replaceAll(<span class=\"hljs-string\">\"oldText\"<\/span>, <span class=\"hljs-string\">\"newText\"<\/span>);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5c06\u4fee\u6539\u540e\u7684\u5185\u5bb9\u5199\u5165\u65b0\u6587\u4ef6<\/span>\r\n        <span class=\"hljs-type\">FileOutputStream<\/span> <span class=\"hljs-variable\">fos<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FileOutputStream<\/span>(<span class=\"hljs-string\">\"newFile.txt\"<\/span>);\r\n        fos.write(modifiedContent.getBytes());\r\n        fos.close();\r\n    }\r\n\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        String[] fileNames = {<span class=\"hljs-string\">\"file1.txt\"<\/span>, <span class=\"hljs-string\">\"file2.txt\"<\/span>, <span class=\"hljs-string\">\"file3.txt\"<\/span>};\r\n\r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            <span class=\"hljs-keyword\">for<\/span> (String fileName : fileNames) {\r\n                modifyFileContent(fileName);\r\n            }\r\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>RandomAccessFile\u30af\u30e9\u30b9\u3092\u5229\u7528\u3059\u308b\uff1aRandomAccessFile\u30af\u30e9\u30b9\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u306e\u8aad\u307f\u66f8\u304d\u3092\u540c\u6642\u306b\u884c\u3046\u3053\u3068\u304c\u53ef\u80fd\u3067\u3001seek()\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3057\u3066\u5909\u66f4\u3057\u305f\u3044\u4f4d\u7f6e\u306b\u5b9a\u4f4d\u3057\u3001write()\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3057\u3066\u65b0\u3057\u3044\u5185\u5bb9\u3092\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.io.IOException;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.RandomAccessFile;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">FileContentModifier<\/span> {\r\n\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_\">modifyFileContent<\/span><span class=\"hljs-params\">(String filePath)<\/span> <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-comment\">\/\/ \u4ee5\u8bfb\u5199\u65b9\u5f0f\u6253\u5f00\u6587\u4ef6<\/span>\r\n        <span class=\"hljs-type\">RandomAccessFile<\/span> <span class=\"hljs-variable\">raf<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">RandomAccessFile<\/span>(filePath, <span class=\"hljs-string\">\"rw\"<\/span>);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5b9a\u4f4d\u5230\u9700\u8981\u4fee\u6539\u7684\u4f4d\u7f6e<\/span>\r\n        raf.seek(<span class=\"hljs-number\">10<\/span>);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5199\u5165\u65b0\u7684\u5185\u5bb9<\/span>\r\n        raf.writeBytes(<span class=\"hljs-string\">\"newText\"<\/span>);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5173\u95ed\u6587\u4ef6<\/span>\r\n        raf.close();\r\n    }\r\n\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        String[] fileNames = {<span class=\"hljs-string\">\"file1.txt\"<\/span>, <span class=\"hljs-string\">\"file2.txt\"<\/span>, <span class=\"hljs-string\">\"file3.txt\"<\/span>};\r\n\r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            <span class=\"hljs-keyword\">for<\/span> (String fileName : fileNames) {\r\n                modifyFileContent(fileName);\r\n            }\r\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u8907\u6570\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u4e00\u62ec\u4fee\u6b63\u3059\u308b\u306b\u306f\u3001\u3053\u306e2\u3064\u306e\u65b9\u6cd5\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u5b9f\u969b\u306e\u30cb\u30fc\u30ba\u306b\u57fa\u3065\u3044\u3066\u3001\u9069\u5207\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u5909\u66f4\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001\u4e0b\u8a18\u306e\u65b9\u6cd5\u3067\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u4e00\u62ec\u3067\u5909\u66f4\u3067\u304d\u307e\u3059\u3002 FileInputStream\u3068FileOutputStream\u3092\u4f7f\u3063\u3066\u3001\u5143\u306e\u30d5\u30a1\u30a4\u30eb\u3092FileInputStream\u3067\u8aad\u307f\u8fbc\u307f\u3001\u52a0\u5de5\u3057\u305f\u5185\u5bb9\u3092FileOu [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-79935","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>\u5927\u91cf\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092Java\u3067\u4e00\u62ec\u5909\u66f4\u306e\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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