{"id":7201,"date":"2024-03-14T21:00:12","date_gmt":"2024-03-14T12:00:12","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%83%97%e3%83%ad%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e3%83%ab%e3%83%bc%e3%83%88%e3%83%87%e3%82%a3%e3%83%ac%e3%82%af%e3%83%88%e3%83%aa%e3%82%92%e5%8f%96%e5%be%97%e3%81%99\/"},"modified":"2025-08-03T13:17:53","modified_gmt":"2025-08-03T04:17:53","slug":"java%e3%81%a7%e3%83%97%e3%83%ad%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e3%83%ab%e3%83%bc%e3%83%88%e3%83%87%e3%82%a3%e3%83%ac%e3%82%af%e3%83%88%e3%83%aa%e3%82%92%e5%8f%96%e5%be%97%e3%81%99","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%83%97%e3%83%ad%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e3%83%ab%e3%83%bc%e3%83%88%e3%83%87%e3%82%a3%e3%83%ac%e3%82%af%e3%83%88%e3%83%aa%e3%82%92%e5%8f%96%e5%be%97%e3%81%99\/","title":{"rendered":"Java \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u53d6\u5f97\u65b9\u6cd5"},"content":{"rendered":"<p>Java\u3067\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<ol>\n<li>\u901a\u5e38\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3068\u3057\u3066\u3001System.getProperty\uff08\u201cuser.dir\u201d\uff09\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u73fe\u5728\u306e\u4f5c\u696d\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">rootDirectory<\/span> <span class=\"hljs-operator\">=<\/span> System.getProperty(<span class=\"hljs-string\">\"user.dir\"<\/span>);\r\nSystem.out.println(<span class=\"hljs-string\">\"Root Directory: \"<\/span> + rootDirectory);\r\n<\/code><\/pre>\n<ol>\n<li>ClassLoader\u30af\u30e9\u30b9\u306egetResource()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">ClassLoader<\/span> <span class=\"hljs-variable\">classLoader<\/span> <span class=\"hljs-operator\">=<\/span> getClass().getClassLoader();\r\n<span class=\"hljs-type\">URL<\/span> <span class=\"hljs-variable\">rootUrl<\/span> <span class=\"hljs-operator\">=<\/span> classLoader.getResource(<span class=\"hljs-string\">\"\"<\/span>);\r\n<span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">rootDirectory<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">File<\/span>(rootUrl.getPath()).getAbsolutePath();\r\nSystem.out.println(<span class=\"hljs-string\">\"Root Directory: \"<\/span> + rootDirectory);\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3089\u306e2\u3064\u306e\u65b9\u6cd5\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u306e\u3067\u3001\u3042\u306a\u305f\u306e\u30cb\u30fc\u30ba\u306b\u5408\u3063\u305f\u65b9\u6cd5\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a \u901a\u5e38\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3068\u3057\u3066\u3001System.getProperty\uff08\u201cuser.dir\u201d\uff09\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u73fe\u5728\u306e\u4f5c\u696d\u30c7\u30a3\u30ec\u30af\u30c8 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[42,1234,1916,178,57],"class_list":["post-7201","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-java","tag-1234","tag-1916","tag-178","tag-57"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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