{"id":1896,"date":"2024-03-13T14:51:27","date_gmt":"2024-03-13T05:51:27","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e5%88%a5%e3%81%ae%e3%83%97%e3%83%ad%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%bc%e3%83%95%e3%82%a7%e3%83%bc%e3%82%b9%e3%82%92%e5%91%bc%e3%81%b3\/"},"modified":"2025-08-02T03:08:39","modified_gmt":"2025-08-01T18:08:39","slug":"java%e3%81%a7%e5%88%a5%e3%81%ae%e3%83%97%e3%83%ad%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%bc%e3%83%95%e3%82%a7%e3%83%bc%e3%82%b9%e3%82%92%e5%91%bc%e3%81%b3","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e5%88%a5%e3%81%ae%e3%83%97%e3%83%ad%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%bc%e3%83%95%e3%82%a7%e3%83%bc%e3%82%b9%e3%82%92%e5%91%bc%e3%81%b3\/","title":{"rendered":"Java\u3067\u5225\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u306f\uff1f"},"content":{"rendered":"<p>\u5225\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u547c\u3073\u51fa\u3059\u306b\u306f\u3001Java\u306eHTTP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u3066HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3001\u5fdc\u7b54\u3092\u53d7\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Java\u306eHttpURLConnection\u3092\u4f7f\u7528\u3057\u3066\u5225\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u547c\u3073\u51fa\u3059\u65b9\u6cd5\u3092\u793a\u3059\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\uff1a<\/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.InputStreamReader;\r\n<span class=\"hljs-keyword\">import<\/span> java.net.HttpURLConnection;\r\n<span class=\"hljs-keyword\">import<\/span> java.net.URL;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">ApiClient<\/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_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            <span class=\"hljs-type\">URL<\/span> <span class=\"hljs-variable\">url<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">URL<\/span>(<span class=\"hljs-string\">\"http:\/\/api.example.com\/some-endpoint\"<\/span>);\r\n            <span class=\"hljs-type\">HttpURLConnection<\/span> <span class=\"hljs-variable\">connection<\/span> <span class=\"hljs-operator\">=<\/span> (HttpURLConnection) url.openConnection();\r\n            connection.setRequestMethod(<span class=\"hljs-string\">\"GET\"<\/span>);\r\n\r\n            <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u8bf7\u6c42\u5934<\/span>\r\n            connection.setRequestProperty(<span class=\"hljs-string\">\"Content-Type\"<\/span>, <span class=\"hljs-string\">\"application\/json\"<\/span>);\r\n            connection.setRequestProperty(<span class=\"hljs-string\">\"Authorization\"<\/span>, <span class=\"hljs-string\">\"Bearer your_access_token\"<\/span>);\r\n\r\n            <span class=\"hljs-comment\">\/\/ \u53d1\u8d77\u8bf7\u6c42<\/span>\r\n            <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">responseCode<\/span> <span class=\"hljs-operator\">=<\/span> connection.getResponseCode();\r\n\r\n            <span class=\"hljs-keyword\">if<\/span> (responseCode == HttpURLConnection.HTTP_OK) {\r\n                <span class=\"hljs-type\">BufferedReader<\/span> <span class=\"hljs-variable\">in<\/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_\">InputStreamReader<\/span>(connection.getInputStream()));\r\n                String inputLine;\r\n                <span class=\"hljs-type\">StringBuffer<\/span> <span class=\"hljs-variable\">response<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">StringBuffer<\/span>();\r\n\r\n                <span class=\"hljs-keyword\">while<\/span> ((inputLine = in.readLine()) != <span class=\"hljs-literal\">null<\/span>) {\r\n                    response.append(inputLine);\r\n                }\r\n\r\n                in.close();\r\n\r\n                System.out.println(response.toString());\r\n            } <span class=\"hljs-keyword\">else<\/span> {\r\n                System.out.println(<span class=\"hljs-string\">\"Failed to call API. Response code: \"<\/span> + responseCode);\r\n            }\r\n\r\n            connection.disconnect();\r\n        } <span class=\"hljs-keyword\">catch<\/span> (Exception e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001HttpURLConnection\u3092\u4f7f\u7528\u3057\u3066GET\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u3001\u4e00\u90e8\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u30d8\u30c3\u30c0\uff08Content-Type\u3084Authorization\u306a\u3069\uff09\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u30b3\u30fc\u30c9\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u5185\u5bb9\u3092\u5370\u5237\u3057\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u8981\u6c42\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u8a2d\u5b9a\u3084\u51e6\u7406\u304c\u5fc5\u8981\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001JSON\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u3084POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u9001\u4fe1\u306a\u3069\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u3055\u3089\u306b\u3001Apache HttpClient\u3084OkHttp\u306a\u3069\u306e\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30fc\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u3066\u3001HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u51e6\u7406\u3092\u7c21\u7d20\u5316\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5225\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u547c\u3073\u51fa\u3059\u306b\u306f\u3001Java\u306eHTTP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u3066HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3001\u5fdc\u7b54\u3092\u53d7\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Java\u306eHttpURLConnection\u3092\u4f7f\u7528\u3057\u3066 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-1896","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) - 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