{"id":8870,"date":"2024-03-15T01:43:44","date_gmt":"2024-03-14T16:43:44","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%bf%e3%82%a4%e3%83%97%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%ab%e3%81%af%e4%bd%95%e3%81%8c%e3%81%82%e3%82%8a\/"},"modified":"2025-08-03T22:32:23","modified_gmt":"2025-08-03T13:32:23","slug":"java%e3%81%a7%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%bf%e3%82%a4%e3%83%97%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%ab%e3%81%af%e4%bd%95%e3%81%8c%e3%81%82%e3%82%8a","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%bf%e3%82%a4%e3%83%97%e3%82%92%e5%8f%96%e5%be%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%ab%e3%81%af%e4%bd%95%e3%81%8c%e3%81%82%e3%82%8a\/","title":{"rendered":"Java \u30d5\u30a1\u30a4\u30eb\u30bf\u30a4\u30d7\u306e\u53d6\u5f97\u65b9\u6cd5\uff1a\u62e1\u5f35\u5b50\u3001MIME\u30bf\u30a4\u30d7\u3092\u89e3\u8aac"},"content":{"rendered":"<ol>\n<li>FilenameUtils\u30af\u30e9\u30b9\u306egetExtension()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u62e1\u5f35\u5b50\u3092\u53d6\u5f97\u3057\u3001\u305d\u306e\u62e1\u5f35\u5b50\u306b\u57fa\u3065\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u306e\u7a2e\u985e\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/li>\n<li>\u3000Files.probeContentType() \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u306eMIME\u30bf\u30a4\u30d7\u3092\u53d6\u5f97\u3057\u3001\u305d\u306e\u5f8c\u3001MIME\u30bf\u30a4\u30d7\u306b\u57fa\u3065\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u306e\u7a2e\u985e\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/li>\n<li>URLConnection\u30af\u30e9\u30b9\u306eguessContentTypeFromName()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u306eMIME\u30bf\u30a4\u30d7\u3092\u53d6\u5f97\u3057\u3001\u305d\u306eMIME\u30bf\u30a4\u30d7\u306b\u57fa\u3065\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u306e\u7a2e\u985e\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/li>\n<li>Files.probeContentType()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u306eMIME\u30bf\u30a4\u30d7\u3092\u53d6\u5f97\u3057\u3001\u305d\u306eMIME\u30bf\u30a4\u30d7\u306b\u57fa\u3065\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u306e\u7a2e\u985e\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/li>\n<li>Files\u30af\u30e9\u30b9\u3068Path\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\u3092\u53d6\u5f97\u3057\u3001\u305d\u306e\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\u306b\u57fa\u3065\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u306e\u30bf\u30a4\u30d7\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>FilenameUtils\u30af\u30e9\u30b9\u306egetExtension()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u62e1\u5f35\u5b50\u3092\u53d6\u5f97\u3057\u3001\u305d\u306e\u62e1\u5f35\u5b50\u306b\u57fa\u3065\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u306e\u7a2e\u985e\u3092\u5224\u65ad\u3057\u307e\u3059\u3002 \u3000Files.probeContentType() \u30e1\u30bd\u30c3\u30c9\u3092 [&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":[42,2518,3162,382,1046],"class_list":["post-8870","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-java","tag-mime","tag-3162","tag-382","tag-1046"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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