{"id":2271,"date":"2019-12-11T15:18:09","date_gmt":"2019-12-11T06:18:09","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?post_type=study_report&#038;p=2271"},"modified":"2019-12-11T15:18:41","modified_gmt":"2019-12-11T06:18:41","slug":"javaweb-vol-2","status":"publish","type":"study_report","link":"https:\/\/www.bold.ne.jp\/engineer-club\/study_report\/javaweb-vol-2","title":{"rendered":"JavaWeb\u30a2\u30d7\u30ea\u958b\u767a\u52c9\u5f37\u4f1a\u30ec\u30dd\u30fc\u30c8 Vol.2"},"content":{"rendered":"<p>\u300c\u899a\u3048\u308b\u300d\u306e\u3067\u306f\u306a\u304f\u300c\u4f5c\u308c\u308b\u300d\u3088\u3046\u306b\u306a\u308b\uff01\u3092\u5408\u8a00\u8449\u306b\u958b\u50ac\u3057\u3066\u3044\u308b<span>JavaWeb<\/span>\u30a2\u30d7\u30ea\u958b\u767a\u52c9\u5f37\u4f1a\u306f\u3001\u958b\u767a\u7cfb\u306e\u52c9\u5f37\u4f1a\u306e\u4e2d\u3067\u3082\u8cc7\u683c\u53d6\u5f97\u3067\u306f\u306a\u304f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u697d\u3057\u3055\u3084\u9762\u767d\u3055\u3092\u5b66\u3093\u3067\u8cb0\u3046\u4e8b\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u3093\u306a\u5b9f\u8df5\u7684\u3067\u5b9f\u6280\u591a\u3081\u306a<span>JavaWeb<\/span>\u30a2\u30d7\u30ea\u958b\u767a\u52c9\u5f37\u4f1a\u306e\u7b2c\uff13\u56de\u76ee\u3092\u30ec\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/p>\n<h2><b>\uff11\uff0e\u4eca\u56de\u306e\u30c6\u30fc\u30de\u3068\u5185\u5bb9<\/b><\/h2>\n<p><b><\/b>\u4eca\u56de\u306e\u30c6\u30fc\u30de\u306f\u3001\u30ba\u30d0\u30ea\u300c\u30b9\u30b3\u30fc\u30d7\u300d\u3067\u3059\u3002\u524d\u56de\u306f\u3001<span>Web<\/span>\u30b7\u30b9\u30c6\u30e0\u306e\u30d5\u30ed\u30f3\u30c8\u90e8\u5206\u306e\u30d9\u30fc\u30b9\u3068\u306a\u308b\u300c\u30d5\u30a9\u30fc\u30e0\u300d\u3068<span>Web<\/span>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u306e\u30d9\u30fc\u30b9\u3068\u306a\u308b\u4ed5\u7d44\u307f\u306e\u300c<span>MVC<\/span>\u30e2\u30c7\u30eb\u300d\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3057\u305f\u3002\u4eca\u56de\u306f\u3001<span>Web<\/span>\u30b7\u30b9\u30c6\u30e0\u3067\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3059\u308b\u4ed5\u7d44\u307f\u306e\u300c\u30b9\u30b3\u30fc\u30d7\u300d\u3067\u3059\u3002\u30b9\u30b3\u30fc\u30d7\u3068\u306f\uff1f\u304b\u3089\u59cb\u307e\u308a\u3001\uff13\u3064\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u3064\u3044\u3066\u306e\u89e3\u8aac\u306e\u3042\u3068\u5b9f\u969b\u306b\u81ea\u5206\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u3063\u3066\u3001\u300c\u30b9\u30b3\u30fc\u30d7\u300d\u3092\u4f53\u9a13\u3057\u307e\u3059\u3002<\/p>\n<p>\u3067\u306f\u3001\u4eca\u56de\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3067\u3059\u3002<\/p>\n<h3><img decoding=\"async\" loading=\"lazy\" width=\"379\" height=\"216\" class=\"size-full wp-image-2273 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2019\/12\/001.png\" \/><\/h3>\n<h3>\uff11-\uff11\uff0e<strong>\u30b9\u30b3\u30fc\u30d7<\/strong><\/h3>\n<p>\u307e\u305a\u306f\u30b9\u30b3\u30fc\u30d7\u306e\u57fa\u672c\u304b\u3089\u8b1b\u7fa9\u304c\u59cb\u307e\u308a\u307e\u3059\u3002\u672c\u65e5\u306e\u306f\u3058\u3081\u306e\uff11\u6b69\u3067\u3059\u304c\u3001\u57fa\u672c\u306e\u300c\u304d\u300d\u3067\u3059\u304b\u3089\u3001\u8b1b\u5e2b\u3082\u4e01\u5be7\u306b\u8aac\u660e\u3092\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u5927\u307e\u304b\u306a\u8b1b\u7fa9\u306e\u6d41\u308c\u306f\u6b21\u306e\u901a\u308a\u3002<\/p>\n<p>\u2460\u30b9\u30b3\u30fc\u30d7\u3068\u306f<br \/>\n\u2461\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u5171\u6709\u3067\u304d\u306a\u3044\u3068\u3002\u3002\u3002<br \/>\n\u2462\u30b9\u30b3\u30fc\u30d7\u306e\u7a2e\u985e<br 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\/><\/p>\n<p>&nbsp;<\/p>\n<h4>\u2460\u30b9\u30b3\u30fc\u30d7\u3068\u306f<\/h4>\n<p>\u30b9\u30b3\u30fc\u30d7\u3068\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58\u3067\u304d\u308b\u9818\u57df\uff08\u30e1\u30e2\u30ea\uff09\u3067\u3042\u308a\u3001\u30b5\u30fc\u30d6\u30ec\u30c3 \u30c8\u30af\u30e9\u30b9\u3068JSP\u30d5\u30a1\u30a4\u30eb\u304c\u4efb\u610f\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58\u3057\u305f\u308a\u3001\u4fdd\u5b58 \u3055\u308c\u3066\u3044\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h4>\u2461\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u5171\u6709\u3067\u304d\u306a\u3044\u3068\u3002\u3002\u3002<\/h4>\n<p>\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u30af\u30e9\u30b9\u304c\u51e6\u7406\u7d50\u679c\u3092\u2f63\u6210 \u3057\u3001\u305d\u306e\u51fa\u2f12\u4f9d\u983c\u3092JSP\u30d5\u30a1\u30a4\u30eb \u306b\u30d5\u30a9\u30ef\u30fc\u30c9\u3057\u3066\u3082\u3001JSP\u30d5\u30a1\u30a4 \u30eb\u306f\u51e6\u7406\u7d50\u679c(\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9)\u3092\u53d6\u5f97\u3067\u304d\u307e\u305b\u3093\u3002\u300cJSP\u30d5\u30a1\u30a4\u30eb\u306b\u30d5\u30a9\u30ef\u30fc\u30c9\u300d\u306f\u3001\u524d\u56de\u306e\u8b1b\u7fa9\u3067\u52c9\u5f37\u3057\u307e\u3057\u305f\u306d\u3002<br \/>\n\u5ea7\u3063\u3066\u805e\u304f\u3060\u3051\u3067\u306a\u304f\u3001\u5b9f\u969b\u306b\u81ea\u5206\u3067\u4f5c\u3063\u3066\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u52c9\u5f37\u4f1a\u3067\u3059\u304b\u3089\u7406\u89e3\u3082\u30d0\u30c3\u30c1\u30ea\u3067\u3059\uff01<\/p>\n<h4>\u2462\u30b9\u30b3\u30fc\u30d7\u306e\u7a2e\u985e<\/h4>\n<p>\u30fb\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7<br \/>\n\u30fb\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7<br \/>\n\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7<\/p>\n<h4>\u2463\u30b9\u30b3\u30fc\u30d7\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<\/h4>\n<p>\u30b9\u30b3\u30fc\u30d7\u306b\u4fdd\u5b58\u3067\u304d\u308b\u306e\u306f\u300c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u300d\u306b\u9650\u3089\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\nint\u578b\u3084double\u578b\u306a\u3069\u306e\u57fa\u672c\u30c7\u30fc\u30bf\u578b\u5909\u6570\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067 \u306f\u306a\u3044\u306e\u3067\u30b9\u30b3\u30fc\u30d7\u306b\u4fdd\u5b58\u3067\u304d\u307e\u305b\u3093\u3002<br \/>\n\u57fa\u672c\u30c7\u30fc\u30bf\u578b\u3092\u30b9\u30b3\u30fc\u30d7\u306b \u4fdd\u5b58\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9(\u57fa\u672c\u30c7\u30fc\u30bf\u578b\u306e\u60c5\u5831\u3060\u3051\u3092\u683c \u7d0d\u3059\u308bInteger\u3084Double\u306a\u3069\u306e\u30af\u30e9\u30b9)\u3092\u5229\u2f64\u3057\u307e\u3059\u3002\u30b9\u30b3\u30fc\u30d7\u306b\u306f String\u3001Integer\u306a\u3069\u901a\u5e38\u306e\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58\u3067\u304d\u307e\u3059\u304c\u3001 \u57fa\u672c\u7684\u306b\u306f\u300cJavaBeans\u300d\u3068\u547c\u3070\u308c\u308b\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd \u5b58\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u8b1b\u7fa9\u5185\u5bb9\u3092\u8a73\u7d30\u306b\u30ec\u30dd\u30fc\u30c8\u3067\u304d\u307e\u305b\u3093\u304c\u3001\u57fa\u672c\u3092\u3057\u3063\u304b\u308a\u3068\u62bc\u3055\u3048\u305f\u8b1b\u7fa9\u5185\u5bb9\u3067\u3059\u306e\u3067\u3001\u53d7\u8b1b\u8005\u3082\u3061\u3083\u3093\u3068\u8b1b\u7fa9\u306b\u3064\u3044\u3066\u304d\u3066\u3044\u307e\u3059\u3002\u307f\u306a\u3055\u3093\u3001\u5b9f\u6280\u306b\u5411\u3051\u3066\u30a4\u30e1\u30fc\u30b8\u3092\u81a8\u3089\u307e\u305b\u306a\u304c\u3089\u805e\u3044\u3066\u3044\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<h3><strong>\uff11-\uff12\uff0e\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7<\/strong><\/h3>\n<p>\uff13\u3064\u3042\u308b\u30b9\u30b3\u30fc\u30d7\u306e<span>1<\/span>\u3064\u76ee\u3001\u300c\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u300d\u3067\u3059\u3002\u5927\u307e\u304b\u306a\u8b1b\u7fa9\u306e\u6d41\u308c\u306f\u6b21\u306e\u901a\u308a\u3002<br \/>\n\u2460\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306e\u7279\u5fb4<br \/>\n\u2461\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306e\u57fa\u672c\u64cd\u4f5c<br \/>\n\u2462\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306e\u6ce8\u610f\u70b9<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"700\" height=\"299\" class=\"aligncenter wp-image-2277 size-full\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2019\/12\/003.png\" \/><\/p>\n<h4>\u2460\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306e\u7279\u5fb4<\/h4>\n<p>\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306f\u30ea\u30af\u30a8 \u30b9\u30c8\u3054\u3068\u306b\u2f63\u6210\u3055\u308c\u308b\u30b9\u30b3\u30fc \u30d7\u3067\u3001\u3053\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u4fdd\u5b58\u3057\u305f \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001\u30ec\u30b9\u30dd\u30f3\u30b9 \u304c\u8fd4\u5374\u3055\u308c\u308b\u307e\u3067\u5229\u2f64\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30d5\u30a9\u30ef\u30fc\u30c9\u5143\u3068 \u30d5\u30a9\u30ef\u30fc\u30c9\u5148\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9 \u3092\u5171\u6709\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4>\u2461\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306e\u57fa\u672c\u64cd\u4f5c<\/h4>\n<p>\u30fb\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58<br \/>\n\u3000\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58\u3059\u308b\u306b\u306f\u3001<span>HttpServletRequest <\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e<span>setAttribute()<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u2f64\u3057\u307e\u3059\u3002<br \/>\n\u30fb\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u5185\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97<br \/>\n\u3000\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306b\u4fdd\u5b58\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u5229\u2f64\u3059\u308b\u5834\u5408\u306f\u3001<span> HttpServletRequest<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e<span>getAttribute()<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u2f64\u3057\u307e\u3059\u3002<\/p>\n<h4>\u2462\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u306e\u6ce8\u610f\u70b9<\/h4>\n<p>\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u8de8\u3044\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u5171\u6709\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\uff01\uff01<br \/>\n\u307e\u305a\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u304b\u3089\u8b1b\u7fa9\u3067\u3059\u3002\u56f3\u3092\u4f7f\u3063\u305f\u51e6\u7406\u306e\u6d41\u308c\u3068\u5b9f\u969b\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u4f8b\u3092\u5bfe\u6bd4\u3057\u306a\u304c\u3089\u8b1b\u7fa9\u304c\u9032\u307f\u307e\u3059\u3002\u8b1b\u5e2b\u306e\u65b9\u306f\u53d7\u8b1b\u751f\u306e\u69d8\u5b50\u3092\u898b\u306a\u304c\u3089\u3001\u6240\u3005\u524d\u56de\u307e\u3067\u306e\u5fa9\u7fd2\u3092\u76db\u308a\u8fbc\u3093\u3060\u308a\u3068\u3068\u3066\u3082\u4e01\u5be7\u3067\u3059\uff01<\/p>\n<h3><strong>\uff11-\uff13\uff0e\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7<\/strong><\/h3>\n<p>\uff13\u3064\u3042\u308b\u30b9\u30b3\u30fc\u30d7\u306e\uff12\u3064\u76ee\u3001\u300c\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u300d\u3067\u3059\u3002\u5927\u307e\u304b\u306a\u8b1b\u7fa9\u306e\u6d41\u308c\u306f\u6b21\u306e\u901a\u308a\u3002<br \/>\n\u2460\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u7279\u5fb4<br \/>\n\u2461\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u57fa\u672c\u64cd\u4f5c<br \/>\n\u2462\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u4ed5\u7d44\u307f<br \/>\n\u2463\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u6ce8\u610f\u70b9<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"695\" height=\"311\" class=\"aligncenter wp-image-2278 size-full\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2019\/12\/004.png\" \/><\/p>\n<h4>\u2460\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u7279\u5fb4<\/h4>\n<p>\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u8de8\u3044\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9 \u3092\u5229\u2f64\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u2f64\u3057\u307e\u3059\u3002\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9 \u30b3\u30fc\u30d7\u306b\u4fdd\u5b58\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001 \u300c\u5229\u2f64\u8005\u304c\u30d6\u30e9\u30a6\u30b6\u3092\u9589\u3058\u308b\u300d\u304b\u3001 \u300c\u958b\u767a\u8005\u304c\u660e\u2f70\u7684\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9 \u3092\u524a\u9664\u3059\u308b\u300d\u307e\u3067\u2f83\u7531\u306b\u5229\u2f64\u3059\u308b \u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4>\u2461\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u57fa\u672c\u64cd\u4f5c<\/h4>\n<p>\u30fb\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u53d6\u5f97<br \/>\n\u3000<span>HttpSession<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001<span>HttpServletRequest<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e<span> getSession()<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u53d6\u5f97\u3057\u307e\u3059\u3002<br \/>\n\u30fb\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58<br \/>\n\u3000\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58\u3059\u308b\u5834\u5408\u306f\u3001<span> HttpSession<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e<span>setAttribute()<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u2f64\u3057\u307e\u3059\u3002<\/p>\n<h4>\u2462\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u4ed5\u7d44\u307f<\/h4>\n<p>\u30fb\u30bb\u30c3\u30b7\u30e7\u30f3<span>ID<br \/>\n\u3000<\/span>\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u6b63\u4f53\u3067\u3042\u308b<span>HttpSession<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f \u30e6\u30fc\u30b6\u30fc<span>(<\/span>\u30d6\u30e9\u30a6\u30b6<span>)<\/span>\u3054\u3068\u306b\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0 \u306f<span>HttpSession<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3068\u3001\u5185\u90e8\u3067\u300c\u30bb\u30c3\u30b7\u30e7\u30f3<span>ID<\/span>\u300d\u3068\u547c\u3070\u308c\u308b<span>ID<\/span>\u3092\u65b0\u305f\u306b\u767a\u2f8f\u3057\u3001<span>HttpSession<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068 \u30d6\u30e9\u30a6\u30b6\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u4e21\u8005\u3092\u7d10\u4ed8\u3051\u307e\u3059\u3002<br \/>\n\u30fb\u30bb\u30c3\u30b7\u30e7\u30f3<span>ID<\/span>\u3068\u30af\u30c3\u30ad\u30fc<br \/>\n\u3000\u30af\u30c3\u30ad\u30fc\u3068\u306f\u3001<span>Web<\/span>\u30b5\u30fc\u30d0<span>(<\/span>\u307e\u305f\u306f\u30a2\u30d7\u30ea \u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0<span>)<\/span>\u304c\u30d6\u30e9\u30a6\u30b6\u306b\u30c7\u30fc\u30bf\u3092\u4fdd \u5b58\u3001\u9001\u4fe1\u3055\u305b\u308b\u3057\u304f\u307f\u3067\u3059\u3002\u30b5\u30fc\u30d0\u304c\u30ec\u30b9\u30dd\u30f3 \u30b9\u306b\u300c\u30af\u30c3\u30ad\u30fc\u300d\u3068\u547c\u3070\u308c\u308b\u30c7\u30fc\u30bf\u3092\u542b\u3081 \u308b\u3068\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u53d7\u4fe1\u3057\u305f\u30d6\u30e9\u30a6\u30b6\u306f \u30af\u30c3\u30ad\u30fc\u3092\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306b\u4fdd\u5b58\u3057\u3001\u4ee5\u5f8c\u305d\u306e\u30b5\u30fc\u30d0\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306f\u3001\u4fdd\u5b58\u3057\u305f\u30af\u30c3\u30ad\u30fc\u60c5\u5831\u3092\u2f83\u52d5\u7684\u306b<span>HTTP<\/span>\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u4ed8\u52a0\u3057\u3066\u9001\u4fe1\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u30a2\u30d7\u30ea\u30b1\u30fc \u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u306f\u3001\u30af\u30c3\u30ad\u30fc\u306b\u30bb\u30c3\u30b7\u30e7\u30f3<span>ID<\/span>\u3092\u542b\u3081\u308b\u3053\u3068\u3067\u30d6\u30e9\u30a6\u30b6\uff0f\u30b5\u30fc\u30d0\u9593\u3067\u30bb\u30c3 \u30b7\u30e7\u30f3<span>ID<\/span>\u306e\u3084\u308a\u3068\u308a\u3092\u53ef\u80fd\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4>\u2463\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u6ce8\u610f\u70b9<\/h4>\n<p>\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u3092\u591a\u2f64\u3057\u3059\u304e\u308b\u3068\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0 \u304c\u30e1\u30e2\u30ea\u4e0d\u2f9c\u306b\u306a\u308a\u6027\u80fd\u306e\u4f4e\u4e0b\u3092\u5f15\u304d\u8d77\u3053\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u305d\u3053\u3067\u30a2 \u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u306f\u2f00\u5b9a\u6642\u9593\u5229\u2f64\u3055\u308c\u3066\u3044\u306a\u3044<span>HttpSession <\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4e0d\u8981\u3068\u5224\u65ad\u3057\u3001\u30ac\u30fc\u30d9\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5bfe\u8c61\u3068\u3057\u3001\u3053\u308c\u3092\u300c\u30bb\u30c3\u30b7\u30e7\u30f3\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u300d\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n<p><strong>\u00a0<\/strong>\u7d9a\u3044\u3066\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u8b1b\u7fa9\u3067\u3059\u3002\u56f3\u3092\u4f7f\u3063\u305f\u51e6\u7406\u306e\u6d41\u308c\u3068\u5b9f\u969b\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u4f8b\u3092\u5bfe\u6bd4\u3057\u306a\u304c\u3089\u8b1b\u7fa9\u306f\u30ea\u30af\u30a8\u30b9\u30c8\u30b9\u30b3\u30fc\u30d7\u3068\u540c\u3058\u3067\u3059\u304c\u3001\u5177\u4f53\u7684\u306b\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\n\u300c\u30bb\u30c3\u30b7\u30e7\u30f3<span>ID<\/span>\u300d\u3001\u300c\u30af\u30c3\u30ad\u30fc\u300d\u3001\u300c\u30bb\u30c3\u30b7\u30e7\u30f3\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u300d\u306a\u3069\u3001\u3088\u304f\u805e\u304f\u5358\u8a9e\u304c\u98db\u3073\u4ea4\u3044\u307e\u3059\u304c\u3001\u805e\u3044\u305f\u3053\u3068\u306f\u3042\u3063\u3066\u77e5\u3063\u3066\u3044\u308b\u3051\u3069\u3001\u3061\u3083\u3093\u3068\u8aac\u660e\u3067\u304d\u306a\u3044\u3063\u3066\u4eba\u304c\u610f\u5916\u3068\u591a\u3044\u306e\u3067\u3001\u3072\u3068\u3064\u3072\u3068\u3064\u4e01\u5be7\u306b\u89e3\u8aac\u3057\u3066\u307e\u3059\u306d\u3002\u3053\u3053\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3067\u3059\uff01\uff01<\/p>\n<h3><strong>\uff11-\uff14\uff0e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7<\/strong><\/h3>\n<p>\uff13\u3064\u3042\u308b\u30b9\u30b3\u30fc\u30d7\u306e\u6700\u5f8c\u3001\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u300d\u3067\u3059\u3002\u5927\u307e\u304b\u306a\u8b1b\u7fa9\u306e\u6d41\u308c\u306f\u6b21\u306e\u901a\u308a\u3002<br \/>\n\u2460\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u7279\u5fb4<br \/>\n\u2461\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u57fa\u672c\u64cd\u4f5c<br \/>\n\u2462\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u6ce8\u610f\u70b9<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"694\" height=\"311\" class=\"aligncenter wp-image-2279 size-full\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2019\/12\/005.png\" \/><\/p>\n<h4>\u2460\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u7279\u5fb4<\/h4>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306f\u3001<span> 1<\/span>\u3064\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3064\u304d<span>1 <\/span>\u3064\u4f5c\u6210\u3055\u308c\u308b\u30b9\u30b3\u30fc\u30d7\u3067\u3059\u3002\u305d\u306e\u305f \u3081\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7 \u306b\u4fdd\u5b58\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001<span> Web<\/span>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u7d42\u4e86\u3059\u308b\u307e\u3067\u306e\u9593\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3 \u5185\u306e\u5168\u3066\u306e\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u30af\u30e9\u30b9\u3001<span> JSP<\/span>\u30d5\u30a1\u30a4\u30eb\u3067\u5229\u2f64\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4>\u2461\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u57fa\u672c\u64cd\u4f5c<\/h4>\n<p>\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u53d6\u5f97<br \/>\n\u3000ServletContext\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001\u30b5\u30fc\u30d6\u30ec\u30c3\u30c8\u30af\u30e9\u30b9\u306e\u30b9\u30fc\u30d1\u30fc\u30af \u30e9\u30b9\u3067\u3042\u308b<span>HttpServlet<\/span>\u304b\u3089\u7d99\u627f\u3057\u305f<span>getServletContext()<\/span>\u30e1\u30bd\u30c3\u30c9 \u3067\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<br \/>\n\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58<br \/>\n\u3000\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58\u3059\u308b\u5834\u5408\u306f\u3001<span> ServletContext<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e<span>setAttribute()<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u2f64\u3057\u307e\u3059\u3002<\/p>\n<h4>\u2462\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u6ce8\u610f\u70b9<\/h4>\n<p>\u30fb\u540c\u6642\u30a2\u30af\u30bb\u30b9\u306b\u3088\u308b\u66f4\u65b0<br \/>\n\u3000\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u5185\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9 \u3092\u66f4\u65b0\u3059\u308b\u3088\u3046\u306a\u51e6\u7406\u3092\u8907\u6570\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u304c \u307b\u307c\u540c\u3058\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u2f8f\u3046\u3068\u3001\u30a2\u30d7\u30ea\u30b1\u30fc \u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u4e0d\u6574\u5408\u304c\u767a\u2f63\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u5bfe\u51e6\u6cd5\u3068\u3057\u3066\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u4e0d\u6574\u5408\u304c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3068\u3063\u3066\u81f4\u547d\u7684\u306b\u306a\u308b\u30c7\u30fc\u30bf\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7 \u3067\u4fdd\u5b58\u3057\u306a\u3044<span>(<\/span>\u307e\u305f\u306f\u4fdd\u5b58\u5f8c\u306f\u53d6\u5f97\u306e\u307f\u3067\u66f4\u65b0\u3057\u306a\u3044<span>)<\/span>\u304b\u3001\u3042\u308b\u3044\u306f\u30b9\u30ec\u30c3\u30c9\u306b\u3088\u308b\u7af6\u5408 \u304c\u767a\u2f63\u3057\u306a\u3044\u3088\u3046\u306b\u8abf\u505c\u3092\u2f8f\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u300c\u30b9\u30ec\u30c3 \u30c9\u300d\u3068\u306f\u51e6\u7406\u306e\u5358\u4f4d\u306e\u3053\u3068\u3067\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u6bce\u306b\u30b9\u30ec\u30c3\u30c9\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<br \/>\n\u30fb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u4fdd\u5b58\u671f\u9593<br \/>\n\u3000\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u306b\u4fdd\u5b58\u3057\u305f\u30c7\u30fc\u30bf<span>(<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<span>)<\/span>\u306f\u3001\u30e1\u30e2\u30ea\u4e0a \u306b\u3042\u308b\u305f\u3081<span>Web<\/span>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u7d42\u4e86\u3059\u308b\u3068\u6d88\u6ec5\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<br \/>\n\u3000<span>Web<\/span>\u30a2 \u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u518d\u958b\u5f8c\u3067\u3082\u4f7f\u2f64\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u306b\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u3084\u30c7\u30fc\u30bf \u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u307e\u305f\u30bb\u30c3\u30b7\u30e7\u30f3\u30b9\u30b3\u30fc\u30d7\u3068\u9055\u3044\u30bf\u30a4\u30e0\u30a2 \u30a6\u30c8\u304c\u306a\u3044\u306e\u3067\u3001\u524a\u9664\u3057\u306a\u3044\u3068\u30e1\u30e2\u30ea\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u6b8b\u308a\u7d9a\u3051\u3066\u3057\u307e\u3044\u307e\u3059\u3002<br \/>\n\u3000\u2f24\u91cf\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u5b58\u3057\u305f\u307e\u307e\u306b\u3059\u308b\u3068\u3001\u30e1\u30e2\u30ea\u3092\u5727\u8feb\u3057\u7d9a\u3051\u308b\u3053\u3068 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