{"id":414,"date":"2023-09-17T06:25:53","date_gmt":"2022-12-10T20:19:51","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/url%e3%81%8b%e3%82%89%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%92java%e3%81%a7%e3%83%80%e3%82%a6%e3%83%b3%e3%83%ad%e3%83%bc%e3%83%89%e3%81%99%e3%82%8b\/"},"modified":"2025-07-31T23:24:26","modified_gmt":"2025-07-31T14:24:26","slug":"url%e3%81%8b%e3%82%89%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%92java%e3%81%a7%e3%83%80%e3%82%a6%e3%83%b3%e3%83%ad%e3%83%bc%e3%83%89%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/url%e3%81%8b%e3%82%89%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%82%92java%e3%81%a7%e3%83%80%e3%82%a6%e3%83%b3%e3%83%ad%e3%83%bc%e3%83%89%e3%81%99%e3%82%8b\/","title":{"rendered":"URL\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u3092Java\u3067\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b"},"content":{"rendered":"<p>\u4eca\u65e5\u306f\u3001Java\u3067URL\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3059\u3002java.net.URL\u306eopenStream()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u3067URL\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Java 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com.scdev.files;\r\n\r\nimport java.io.BufferedInputStream;\r\nimport java.io.FileOutputStream;\r\nimport java.io.IOException;\r\nimport java.net.URL;\r\nimport java.nio.channels.Channels;\r\nimport java.nio.channels.ReadableByteChannel;\r\n\r\npublic class JavaDownloadFileFromURL {\r\n\r\n    public static void main(String[] args) {\r\n        String url = \"https:\/\/www.scdev.com\/sitemap.xml\";\r\n        \r\n        try {\r\n            downloadUsingNIO(url, \"\/Users\/scdev\/sitemap.xml\");\r\n            \r\n            downloadUsingStream(url, \"\/Users\/scdev\/sitemap_stream.xml\");\r\n        } catch (IOException e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n\r\n    private static void downloadUsingStream(String urlStr, String file) throws IOException{\r\n        URL url = new URL(urlStr);\r\n        BufferedInputStream bis = new BufferedInputStream(url.openStream());\r\n        FileOutputStream fis = new FileOutputStream(file);\r\n        byte[] buffer = new byte[1024];\r\n        int count=0;\r\n        while((count = bis.read(buffer,0,1024)) != -1)\r\n        {\r\n            fis.write(buffer, 0, count);\r\n        }\r\n        fis.close();\r\n        bis.close();\r\n    }\r\n\r\n    private static void downloadUsingNIO(String urlStr, String file) throws IOException {\r\n        URL url = new URL(urlStr);\r\n        ReadableByteChannel rbc = Channels.newChannel(url.openStream());\r\n        FileOutputStream fos = new FileOutputStream(file);\r\n        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);\r\n        fos.close();\r\n        rbc.close();\r\n    }\r\n\r\n}\r\n<\/code><\/pre>\n<p>downloadUsingStream: 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