{"id":87287,"date":"2024-03-21T08:11:34","date_gmt":"2024-03-20T23:11:34","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e6%96%87%e5%ad%97%e5%88%97%e3%82%92%e5%9c%a7%e7%b8%ae%e3%81%97%e3%81%a6%e9%80%81%e4%bf%a1%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b\/"},"modified":"2024-04-04T11:10:11","modified_gmt":"2024-04-04T02:10:11","slug":"java%e6%96%87%e5%ad%97%e5%88%97%e3%82%92%e5%9c%a7%e7%b8%ae%e3%81%97%e3%81%a6%e9%80%81%e4%bf%a1%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e6%96%87%e5%ad%97%e5%88%97%e3%82%92%e5%9c%a7%e7%b8%ae%e3%81%97%e3%81%a6%e9%80%81%e4%bf%a1%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b\/","title":{"rendered":"Java\u6587\u5b57\u5217\u3092\u5727\u7e2e\u3057\u3066\u9001\u4fe1\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b"},"content":{"rendered":"<p>Java\u3067\u306f\u6587\u5b57\u5217\u306e\u5727\u7e2e\u8ee2\u9001\u306b\u5727\u7e2e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3067\u304d\u3001\u4e00\u822c\u7684\u306a\u5727\u7e2e\u65b9\u6cd5\u3092\u6b21\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>GZIP\u5727\u7e2e: Java\u306eGZIPOutputStream\u30af\u30e9\u30b9\u3067\u5727\u7e2e\u3057\u3001GZIPInputStream\u30af\u30e9\u30b9\u3067\u5c55\u958b\u3067\u304d\u307e\u3059\u3002\u5727\u7e2e\u3068\u5c55\u958b\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u884c\u3048\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.io.ByteArrayInputStream;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.ByteArrayOutputStream;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.IOException;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.zip.GZIPInputStream;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.zip.GZIPOutputStream;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">GZIPCompression<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-type\">byte<\/span>[] compress(String data) <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-type\">ByteArrayOutputStream<\/span> <span class=\"hljs-variable\">bos<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ByteArrayOutputStream<\/span>();\r\n        <span class=\"hljs-type\">GZIPOutputStream<\/span> <span class=\"hljs-variable\">gzip<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">GZIPOutputStream<\/span>(bos);\r\n        gzip.write(data.getBytes(<span class=\"hljs-string\">\"UTF-8\"<\/span>));\r\n        gzip.close();\r\n        <span class=\"hljs-type\">byte<\/span>[] compressedData = bos.toByteArray();\r\n        bos.close();\r\n        <span class=\"hljs-keyword\">return<\/span> compressedData;\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> String <span class=\"hljs-title function_\">decompress<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">byte<\/span>[] compressedData)<\/span> <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-type\">ByteArrayInputStream<\/span> <span class=\"hljs-variable\">bis<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ByteArrayInputStream<\/span>(compressedData);\r\n        <span class=\"hljs-type\">GZIPInputStream<\/span> <span class=\"hljs-variable\">gzip<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">GZIPInputStream<\/span>(bis);\r\n        <span class=\"hljs-type\">byte<\/span>[] buffer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">byte<\/span>[<span class=\"hljs-number\">1024<\/span>];\r\n        <span class=\"hljs-type\">StringBuilder<\/span> <span class=\"hljs-variable\">sb<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">StringBuilder<\/span>();\r\n        <span class=\"hljs-type\">int<\/span> len;\r\n        <span class=\"hljs-keyword\">while<\/span> ((len = gzip.read(buffer)) != -<span class=\"hljs-number\">1<\/span>) {\r\n            sb.append(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">String<\/span>(buffer, <span class=\"hljs-number\">0<\/span>, len, <span class=\"hljs-string\">\"UTF-8\"<\/span>));\r\n        }\r\n        gzip.close();\r\n        bis.close();\r\n        <span class=\"hljs-keyword\">return<\/span> sb.toString();\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> <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">originalString<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"This is a test string\"<\/span>;\r\n        <span class=\"hljs-type\">byte<\/span>[] compressedData = compress(originalString);\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">decompressedString<\/span> <span class=\"hljs-operator\">=<\/span> decompress(compressedData);\r\n        System.out.println(<span class=\"hljs-string\">\"Original string: \"<\/span> + originalString);\r\n        System.out.println(<span class=\"hljs-string\">\"Compressed data: \"<\/span> + <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">String<\/span>(compressedData));\r\n        System.out.println(<span class=\"hljs-string\">\"Decompressed string: \"<\/span> + decompressedString);\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u30c7\u30d5\u30ec\u30fc\u30bf\u5727\u7e2e\u3067\u306f\u3001Java \u306e Deflater \u30af\u30e9\u30b9\u3092\u4f7f\u3063\u3066\u5727\u7e2e\u3057\u3001Inflater \u30af\u30e9\u30b9\u3092\u4f7f\u3063\u3066\u4f38\u5f35\u3057\u307e\u3059\u3002\u5727\u7e2e\u3068\u4f38\u5f35\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u884c\u3048\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.io.ByteArrayOutputStream;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.ByteArrayInputStream;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.IOException;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.zip.Deflater;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.zip.Inflater;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">DeflaterCompression<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-type\">byte<\/span>[] compress(String data) <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-type\">byte<\/span>[] input = data.getBytes(<span class=\"hljs-string\">\"UTF-8\"<\/span>);\r\n        <span class=\"hljs-type\">Deflater<\/span> <span class=\"hljs-variable\">deflater<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Deflater<\/span>();\r\n        deflater.setInput(input);\r\n        <span class=\"hljs-type\">ByteArrayOutputStream<\/span> <span class=\"hljs-variable\">bos<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ByteArrayOutputStream<\/span>(input.length);\r\n        deflater.finish();\r\n        <span class=\"hljs-type\">byte<\/span>[] buffer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">byte<\/span>[<span class=\"hljs-number\">1024<\/span>];\r\n        <span class=\"hljs-keyword\">while<\/span> (!deflater.finished()) {\r\n            <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">count<\/span> <span class=\"hljs-operator\">=<\/span> deflater.deflate(buffer);\r\n            bos.write(buffer, <span class=\"hljs-number\">0<\/span>, count);\r\n        }\r\n        bos.close();\r\n        <span class=\"hljs-type\">byte<\/span>[] compressedData = bos.toByteArray();\r\n        <span class=\"hljs-keyword\">return<\/span> compressedData;\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> String <span class=\"hljs-title function_\">decompress<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">byte<\/span>[] compressedData)<\/span> <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-type\">Inflater<\/span> <span class=\"hljs-variable\">inflater<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Inflater<\/span>();\r\n        inflater.setInput(compressedData);\r\n        <span class=\"hljs-type\">ByteArrayOutputStream<\/span> <span class=\"hljs-variable\">bos<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ByteArrayOutputStream<\/span>(compressedData.length);\r\n        <span class=\"hljs-type\">byte<\/span>[] buffer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">byte<\/span>[<span class=\"hljs-number\">1024<\/span>];\r\n        <span class=\"hljs-keyword\">while<\/span> (!inflater.finished()) {\r\n            <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">count<\/span> <span class=\"hljs-operator\">=<\/span> inflater.inflate(buffer);\r\n            bos.write(buffer, <span class=\"hljs-number\">0<\/span>, count);\r\n        }\r\n        bos.close();\r\n        <span class=\"hljs-type\">byte<\/span>[] decompressedData = bos.toByteArray();\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">String<\/span>(decompressedData, <span class=\"hljs-string\">\"UTF-8\"<\/span>);\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> <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">originalString<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"This is a test string\"<\/span>;\r\n        <span class=\"hljs-type\">byte<\/span>[] compressedData = compress(originalString);\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">decompressedString<\/span> <span class=\"hljs-operator\">=<\/span> decompress(compressedData);\r\n        System.out.println(<span class=\"hljs-string\">\"Original string: \"<\/span> + originalString);\r\n        System.out.println(<span class=\"hljs-string\">\"Compressed data: \"<\/span> + <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">String<\/span>(compressedData));\r\n        System.out.println(<span class=\"hljs-string\">\"Decompressed string: \"<\/span> + decompressedString);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3089\u306e\u624b\u6cd5\u3067\u6587\u5b57\u5217\u3092\u5727\u7e2e\u3057\u9001\u4fe1\u3057\u3001\u53d7\u4fe1\u5074\u3067\u5c55\u958b\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u5143\u306e\u6587\u5b57\u5217\u306b\u623b\u305b\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u6587\u5b57\u5217\u306e\u5727\u7e2e\u8ee2\u9001\u306b\u5727\u7e2e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3067\u304d\u3001\u4e00\u822c\u7684\u306a\u5727\u7e2e\u65b9\u6cd5\u3092\u6b21\u306b\u793a\u3057\u307e\u3059\u3002 GZIP\u5727\u7e2e: Java\u306eGZIPOutputStream\u30af\u30e9\u30b9\u3067\u5727\u7e2e\u3057\u3001GZIPInputStream\u30af\u30e9\u30b9\u3067\u5c55\u958b\u3067\u304d\u307e\u3059\u3002\u5727 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-87287","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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>Java\u6587\u5b57\u5217\u3092\u5727\u7e2e\u3057\u3066\u9001\u4fe1\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u6587\u5b57\u5217\u3092\u5727\u7e2e\u3057\u3066\u9001\u4fe1\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u6587\u5b57\u5217\u3092\u5727\u7e2e\u3057\u3066\u9001\u4fe1\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\" \/>\n<meta property=\"og:description\" content=\"Java\u3067\u306f\u6587\u5b57\u5217\u306e\u5727\u7e2e\u8ee2\u9001\u306b\u5727\u7e2e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3067\u304d\u3001\u4e00\u822c\u7684\u306a\u5727\u7e2e\u65b9\u6cd5\u3092\u6b21\u306b\u793a\u3057\u307e\u3059\u3002 GZIP\u5727\u7e2e: Java\u306eGZIPOutputStream\u30af\u30e9\u30b9\u3067\u5727\u7e2e\u3057\u3001GZIPInputStream\u30af\u30e9\u30b9\u3067\u5c55\u958b\u3067\u304d\u307e\u3059\u3002\u5727 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u6587\u5b57\u5217\u3092\u5727\u7e2e\u3057\u3066\u9001\u4fe1\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" 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