{"id":750,"date":"2026-03-27T00:40:20","date_gmt":"2026-03-27T00:40:20","guid":{"rendered":"https:\/\/www.visualize-ai.com\/ja\/5-common-mistakes-object-oriented-design\/"},"modified":"2026-03-27T00:40:20","modified_gmt":"2026-03-27T00:40:20","slug":"5-common-mistakes-object-oriented-design","status":"publish","type":"post","link":"https:\/\/www.visualize-ai.com\/ja\/5-common-mistakes-object-oriented-design\/","title":{"rendered":"\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08\u306b\u304a\u3051\u308b5\u3064\u306e\u4e00\u822c\u7684\u306a\u8aa4\u308a\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5"},"content":{"rendered":"<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08\uff08OOD\uff09\u306f\u3001\u4fdd\u5b88\u53ef\u80fd\u306a\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u57fa\u76e4\u3067\u3059\u3002\u30b3\u30fc\u30c9\u5185\u3067\u73fe\u5b9f\u4e16\u754c\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u30e2\u30c7\u30eb\u5316\u3059\u308b\u305f\u3081\u306e\u69cb\u9020\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u63d0\u4f9b\u3057\u3001\u518d\u5229\u7528\u6027\u3068\u660e\u78ba\u6027\u3092\u4fc3\u9032\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u3089\u306e\u539f\u5247\u3092\u8aa4\u3063\u3066\u9069\u7528\u3059\u308b\u3068\u3001\u62e1\u5f35\u3084\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3\u306a\u8106\u3044\u30b7\u30b9\u30c6\u30e0\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u591a\u304f\u306e\u958b\u767a\u8005\u306f\u3001\u30af\u30e9\u30b9\u3084\u76f8\u4e92\u4f5c\u7528\u306e\u8a2d\u8a08\u306b\u304a\u3044\u3066\u4e88\u6e2c\u53ef\u80fd\u306a\u7f60\u306b\u306f\u307e\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u4e00\u822c\u7684\u306aOOD\u5b9f\u88c5\u306b\u898b\u3089\u308c\u308b5\u3064\u306e\u91cd\u5927\u306a\u8aa4\u308a\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u8aa4\u308a\u306e\u80cc\u5f8c\u306b\u3042\u308b\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u660e\u3089\u304b\u306b\u3057\u3001\u5177\u4f53\u7684\u306a\u4fee\u6b63\u6226\u7565\u3092\u63d0\u793a\u3057\u307e\u3059\u3002\u6839\u672c\u7684\u306a\u539f\u56e0\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u6642\u4ee3\u306b\u5de6\u53f3\u3055\u308c\u306a\u3044\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Chibi-style infographic illustrating 5 common object-oriented design mistakes: overusing inheritance, violating encapsulation, creating god objects, tight coupling, and ignoring cohesion\u2014with visual solutions and best practices for maintainable software architecture\" decoding=\"async\" src=\"https:\/\/www.visualize-ai.com\/wp-content\/uploads\/2026\/03\/5-ood-mistakes-chibi-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>1. \u7d99\u627f\u968e\u5c64\u306e\u904e\u5270\u4f7f\u7528 \ud83c\udf33<\/h2>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u6700\u3082\u5e83\u7bc4\u306a\u554f\u984c\u306e\u4e00\u3064\u306f\u3001\u6df1\u3044\u7d99\u627f\u30c4\u30ea\u30fc\u3078\u306e\u4f9d\u5b58\u3067\u3059\u3002\u7d99\u627f\u306f\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u3092\u901a\u3058\u3066\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u304c\u3001\u904e\u5270\u306a\u4f7f\u7528\u306f\u89aa\u30af\u30e9\u30b9\u3068\u5b50\u30af\u30e9\u30b9\u306e\u9593\u306b\u5f37\u3044\u7d50\u5408\u3092\u751f\u3058\u3055\u305b\u307e\u3059\u3002\u57fa\u5e95\u30af\u30e9\u30b9\u304c\u5909\u66f4\u3055\u308c\u308b\u3068\u3001\u3059\u3079\u3066\u306e\u6d3e\u751f\u30af\u30e9\u30b9\u304c\u4e88\u671f\u305b\u306c\u5f62\u3067\u7834\u7dbb\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u554f\u984c\u70b9\uff1a\u8106\u5f31\u306a\u57fa\u5e95\u30af\u30e9\u30b9<\/h3>\n<ul>\n<li><strong>\u96a0\u308c\u305f\u4f9d\u5b58\u95a2\u4fc2\uff1a<\/strong> \u5b50\u30af\u30e9\u30b9\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3060\u3051\u3067\u306a\u304f\u3001\u89aa\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u8a73\u7d30\u306b\u3082\u4f9d\u5b58\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/li>\n<li><strong>\u30ea\u30b9\u30b3\u30d5\u306e\u7f6e\u63db\u539f\u5247\u306e\u9055\u53cd\uff1a<\/strong> \u6d3e\u751f\u30af\u30e9\u30b9\u3092\u89aa\u30af\u30e9\u30b9\u306b\u7f6e\u304d\u63db\u3048\u3066\u3082\u6b63\u3057\u304f\u52d5\u4f5c\u3057\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u3001\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u3002<\/li>\n<li><strong>\u8907\u96d1\u6027\u306e\u5897\u5927\uff1a<\/strong> \u65b0\u3057\u3044\u6a5f\u80fd\u3092\u8ffd\u52a0\u3059\u308b\u969b\u3001\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u5909\u66f4\u304c\u5fc5\u8981\u306b\u306a\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u65e2\u5b58\u306e\u3059\u3079\u3066\u306e\u30b5\u30d6\u30af\u30e9\u30b9\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u3002<\/li>\n<\/ul>\n<h3>\u89e3\u6c7a\u7b56\uff1a\u7d99\u627f\u3088\u308a\u3082\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u512a\u5148\u3059\u308b<\/h3>\n<p>\u300c\u306f-a\u300d\u95a2\u4fc2\u3092\u69cb\u7bc9\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u300c\u6301\u3064-a\u300d\u95a2\u4fc2\u3092\u512a\u5148\u3059\u308b\u3002\u5c0f\u3055\u306a\u3001\u7126\u70b9\u3092\u7d5e\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u6a5f\u80fd\u3092\u5b9f\u73fe\u3059\u308b\u3002\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u3088\u308a\u7d50\u5408\u5ea6\u304c\u4f4e\u4e0b\u3057\u3001\u5b9f\u884c\u6642\u306b\u304a\u3051\u308b\u52d5\u7684\u306a\u632f\u308b\u821e\u3044\u306e\u5909\u66f4\u304c\u53ef\u80fd\u306b\u306a\u308b\u3002<\/p>\n<h3>\u30b3\u30fc\u30c9\u69cb\u9020\u306e\u6bd4\u8f03<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u30a2\u30d7\u30ed\u30fc\u30c1<\/th>\n<th>\u67d4\u8edf\u6027<\/th>\n<th>\u4fdd\u5b88\u6027<\/th>\n<th>\u63a8\u5968\u3055\u308c\u308b\u4f7f\u7528\u6cd5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u6df1\u3044\u7d99\u627f<\/strong><\/td>\n<td>\u4f4e<\/td>\n<td>\u4f4e<\/td>\n<td>\u771f\u306e\u6570\u5b66\u7684\u968e\u5c64\u306b\u306e\u307f\uff08\u4f8b\uff1aShape \u2192 Circle\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3<\/strong><\/td>\n<td>\u9ad8<\/td>\n<td>\u9ad8<\/td>\n<td>\u307b\u3068\u3093\u3069\u306e\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u304a\u3088\u3073\u6a5f\u80fd\u5b9f\u88c5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u3059\u308b\u969b\u306b\u306f\u3001\u81ea\u5206\u81ea\u8eab\u306b\u554f\u3046\u3079\u304d\u3067\u3059\uff1a\u5b50\u306f\u3059\u3079\u3066\u306e\u6587\u8108\u3067\u89aa\u3092\u771f\u6b63\u306b\u8868\u73fe\u3057\u3066\u3044\u308b\u304b\uff1f\u7b54\u3048\u304c\u300c\u3044\u3044\u3048\u300d\u306e\u5834\u5408\u3001\u632f\u308b\u821e\u3044\u3092\u7d50\u3073\u3064\u3051\u308b\u305f\u3081\u306b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3084\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u691c\u8a0e\u3059\u3079\u304d\u3067\u3059\u3002<\/p>\n<h2>2. \u30ab\u30d7\u30bb\u30eb\u5316\u306e\u9055\u53cd \ud83d\udeab\ud83d\udce6<\/h2>\n<p>\u30ab\u30d7\u30bb\u30eb\u5316\u3068\u306f\u3001\u5185\u90e8\u72b6\u614b\u3092\u96a0\u853d\u3057\u3001\u5b9a\u7fa9\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9\u3092\u901a\u3058\u3066\u306e\u3084\u308a\u53d6\u308a\u3092\u8981\u6c42\u3059\u308b\u539f\u5247\u3067\u3059\u3002\u3057\u304b\u3057\u958b\u767a\u8005\u306f\u983b\u7e41\u306b\u30d1\u30d6\u30ea\u30c3\u30af\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u516c\u958b\u3057\u305f\u308a\u3001\u8ad6\u7406\u306e\u306a\u3044\u5358\u7d14\u306a\u30b2\u30c3\u30bf\u30fc\u3068\u30bb\u30c3\u30bf\u30fc\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30af\u30e9\u30b9\u306f\u632f\u308b\u821e\u3044\u3092\u6301\u3064\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u306f\u306a\u304f\u3001\u30c7\u30fc\u30bf\u69cb\u9020\u306b\u5909\u308f\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<h3>\u30d1\u30d6\u30ea\u30c3\u30af\u306a\u72b6\u614b\u304c\u5371\u967a\u306a\u7406\u7531<\/h3>\n<ul>\n<li><strong>\u5236\u5fa1\u306e\u55aa\u5931\uff1a<\/strong>\u5916\u90e8\u306e\u30b3\u30fc\u30c9\u304c\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u3092\u5373\u5ea7\u306b\u7121\u52b9\u306a\u72b6\u614b\u306b\u5909\u66f4\u3067\u304d\u308b\u3002<\/li>\n<li><strong>\u4e0d\u5909\u6761\u4ef6\u306e\u7834\u58ca\uff1a<\/strong>\u5e38\u306b\u6210\u308a\u7acb\u3064\u3079\u304d\u5236\u7d04\uff08\u4f8b\uff1a\u5e74\u9f62\u306f\u8ca0\u306b\u306a\u308c\u306a\u3044\uff09\u304c\u7121\u8996\u3055\u308c\u308b\u3002<\/li>\n<li><strong>\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u56f0\u96e3\u3055\uff1a<\/strong>\u30c7\u30fc\u30bf\u306e\u4fdd\u5b58\u65b9\u6cd5\u3092\u5909\u66f4\u3059\u308b\u306b\u306f\u3001\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u66f4\u65b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/li>\n<\/ul>\n<h3>\u30c7\u30fc\u30bf\u96a0\u853d\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n<ol>\n<li><strong>\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u306b\u3059\u308b\uff1a<\/strong>\u3059\u3079\u3066\u306e\u30e1\u30f3\u30d0\u5909\u6570\u304c\u30af\u30e9\u30b9\u5916\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002<\/li>\n<li><strong>\u5236\u5fa1\u3055\u308c\u305f\u30a2\u30af\u30bb\u30b9\uff1a<\/strong>\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u53d6\u308a\u3084\u5909\u66f4\u306b\u306f\u3001\u30d1\u30d6\u30ea\u30c3\u30af\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<li><strong>\u691c\u8a3c\u30ed\u30b8\u30c3\u30af\uff1a<\/strong>\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3064\u305f\u3081\u306b\u3001\u30bb\u30c3\u30bf\u30fc\u306e\u30e1\u30bd\u30c3\u30c9\u5185\u306b\u691c\u8a3c\u30ed\u30b8\u30c3\u30af\u3092\u633f\u5165\u3059\u308b\u3002<\/li>\n<li><strong>\u4e0d\u5909\u6027\uff1a<\/strong>\u53ef\u80fd\u306a\u9650\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u5f8c\u306b\u4e0d\u5909\u306b\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3001\u72b6\u614b\u306e\u5909\u66f4\u3092\u5b8c\u5168\u306b\u9632\u6b62\u3059\u308b\u3002<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u3092\u691c\u8a0e\u3057\u3066\u307f\u3088\u3046\uff1a<code>BankAccount<\/code>\u30af\u30e9\u30b9\u3002\u6b8b\u9ad8\u304c\u30d1\u30d6\u30ea\u30c3\u30af\u3067\u3042\u308c\u3070\u3001\u3069\u306e\u30b3\u30fc\u30c9\u3067\u3082\u305d\u308c\u3092\u30bc\u30ed\u3084\u8ca0\u306e\u6570\u306b\u8a2d\u5b9a\u3067\u304d\u308b\u3002\u6b8b\u9ad8\u304c\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u3067\u3042\u308c\u3070\u3001\u9810\u91d1\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u300c\u30aa\u30fc\u30d0\u30fc\u30c9\u30e9\u30d5\u30c8\u7981\u6b62\u300d\u3068\u3044\u3063\u305f\u30eb\u30fc\u30eb\u3092\u5f37\u5236\u3067\u304d\u308b\u3002<\/p>\n<h2>3. \u30b4\u30c3\u30c9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u5de8\u5927\u30af\u30e9\u30b9\uff09\u306e\u4f5c\u6210 \ud83c\udfdb\ufe0f<\/h2>\n<p>\u30b4\u30c3\u30c9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f\u3001\u3042\u307e\u308a\u306b\u3082\u591a\u304f\u306e\u3053\u3068\u3092\u77e5\u3063\u3066\u304a\u308a\u3001\u3042\u307e\u308a\u306b\u3082\u591a\u304f\u306e\u3053\u3068\u3092\u884c\u3046\u30af\u30e9\u30b9\u3067\u3042\u308b\u3002\u3053\u306e\u3088\u3046\u306a\u30af\u30e9\u30b9\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3001UI\u30ed\u30b8\u30c3\u30af\u3001\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3001\u30d5\u30a1\u30a4\u30ebI\/O\u3092\u540c\u6642\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3002\u7d50\u679c\u3068\u3057\u3066\u3001\u5de8\u5927\u3067\u8aad\u307f\u3065\u3089\u3044\u30d5\u30a1\u30a4\u30eb\u306b\u306a\u308a\u3001\u5909\u66f4\u3059\u308b\u306e\u306b\u6050\u308d\u3057\u3044\u5b58\u5728\u3068\u306a\u308b\u3002<\/p>\n<h3>\u30b4\u30c3\u30c9\u30af\u30e9\u30b9\u306e\u5146\u5019<\/h3>\n<ul>\n<li><strong>\u30b3\u30fc\u30c9\u884c\u6570\u306e\u591a\u3055\uff1a<\/strong>\u30af\u30e9\u30b9\u304c\u660e\u78ba\u306a\u5206\u96e2\u306a\u3057\u306b500\u884c\u3092\u8d85\u3048\u308b\u3002<\/li>\n<li><strong>\u591a\u304f\u306e\u8cac\u4efb\uff1a<\/strong>\u95a2\u4fc2\u306e\u306a\u3044\u30bf\u30b9\u30af\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\uff08\u4f8b\uff1a\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u3068\u7a0e\u91d1\u306e\u8a08\u7b97\uff09\u3002<\/li>\n<li><strong>\u9ad8\u3044\u30d5\u30a1\u30f3\u30a2\u30a6\u30c8\uff1a<\/strong>\u591a\u6570\u306e\u4ed6\u306e\u30af\u30e9\u30b9\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308b\u3002<\/li>\n<\/ul>\n<h3>\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306b\u3088\u308b\u89e3\u6c7a<\/h3>\n<p>\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306f\u3001\u30af\u30e9\u30b9\u306f\u5909\u66f4\u3055\u308c\u308b\u3079\u304d\u7406\u7531\u304c\u4e00\u3064\u3060\u3051\u3067\u3042\u308b\u3079\u304d\u3060\u3068\u8ff0\u3079\u3066\u3044\u308b\u3002\u30b4\u30c3\u30c9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u3001\u3088\u308a\u5c0f\u3055\u306a\u3001\u7126\u70b9\u3092\u7d5e\u3063\u305f\u30af\u30e9\u30b9\u306b\u5206\u5272\u3059\u308b\u3002<\/p>\n<h4>\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u6226\u7565<\/h4>\n<ol>\n<li><strong>\u4e00\u8cab\u6027\u306e\u7279\u5b9a\uff1a<\/strong>\u8ad6\u7406\u7684\u306b\u9023\u643a\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b\u3002<\/li>\n<li><strong>\u30af\u30e9\u30b9\u306e\u62bd\u51fa\uff1a<\/strong>\u95a2\u9023\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u65b0\u3057\u3044\u30af\u30e9\u30b9\u306b\u79fb\u52d5\u3059\u308b\u3002<\/li>\n<li><strong>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5c0e\u5165\uff1a<\/strong>\u65b0\u3057\u3044\u30af\u30e9\u30b9\u306e\u5951\u7d04\u3092\u5b9a\u7fa9\u3057\u3066\u3001\u7d50\u5408\u3092\u7de9\u304f\u3059\u308b\u3002<\/li>\n<li><strong>\u59d4\u8b72\uff1a<\/strong>\u5143\u306e\u30af\u30e9\u30b9\u306f\u3001\u65b0\u3057\u3044\u5c02\u9580\u7684\u306a\u30af\u30e9\u30b9\u306b\u30bf\u30b9\u30af\u3092\u59d4\u8b72\u3059\u3079\u304d\u3067\u3042\u308b\u3002<\/li>\n<\/ol>\n<p>\u4f8b\u3048\u3070\u3001<code>ReportGenerator<\/code> \u30af\u30e9\u30b9\u3092<code>DatabaseConnection<\/code> \u30af\u30e9\u30b9\u304b\u3089\u5206\u96e2\u3059\u308b\u3002\u30ec\u30dd\u30fc\u30c8\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306f\u30c7\u30fc\u30bf\u3092\u8981\u6c42\u3059\u3079\u304d\u3067\u3042\u308a\u3001\u63a5\u7d9a\u3092\u76f4\u63a5\u7ba1\u7406\u3059\u3079\u304d\u3067\u306f\u306a\u3044\u3002<\/p>\n<h2>4. \u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u5f37\u3044\u7d50\u5408 \ud83d\udd17<\/h2>\n<p>\u7d50\u5408\u3068\u306f\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u76f8\u4e92\u4f9d\u5b58\u5ea6\u3092\u6307\u3059\u3002\u9ad8\u3044\u7d50\u5408\u5ea6\u306f\u3001\u3042\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u5909\u66f4\u304c\u5225\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u5909\u66f4\u3092\u5f37\u5236\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u3002\u3053\u308c\u306f\u3001\u3042\u308b\u9818\u57df\u306e\u30d0\u30b0\u4fee\u6b63\u304c\u5225\u306e\u9818\u57df\u306e\u6a5f\u80fd\u3092\u7834\u58ca\u3059\u308b\u30c9\u30df\u30ce\u52b9\u679c\u3092\u751f\u3058\u3055\u305b\u308b\u3002<\/p>\n<h3>\u907f\u3051\u305f\u3044\u7d50\u5408\u306e\u7a2e\u985e<\/h3>\n<ul>\n<li><strong>\u76f4\u63a5\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\uff1a<\/strong> \u4f7f\u7528\u3059\u308b<code>new<\/code>\u30af\u30e9\u30b9\u5185\u306bnew\u3092\u4f7f\u7528\u3057\u3066\u4f9d\u5b58\u95a2\u4fc2\u3092\u4f5c\u6210\u3059\u308b\u3068\u3001\u30c6\u30b9\u30c8\u304c\u96e3\u3057\u304f\u306a\u308a\u3001\u30cf\u30fc\u30c9\u30ea\u30f3\u30af\u304c\u751f\u3058\u308b\u3002<\/li>\n<li><strong>\u5177\u4f53\u7684\u306a\u4f9d\u5b58\u95a2\u4fc2\uff1a<\/strong> \u62bd\u8c61\u5316\u3067\u306f\u306a\u304f\u3001\u7279\u5b9a\u306e\u5b9f\u88c5\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u3002<\/li>\n<li><strong>\u30b0\u30ed\u30fc\u30d0\u30eb\u72b6\u614b\uff1a<\/strong> \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u3092\u5171\u6709\u3059\u308b\u3068\u3001\u96a0\u308c\u305f\u4f9d\u5b58\u95a2\u4fc2\u304c\u751f\u3058\u308b\u3002<\/li>\n<\/ul>\n<h3>\u7de9\u3044\u7d50\u5408\u306e\u305f\u3081\u306e\u6226\u7565<\/h3>\n<p>\u7de9\u3044\u7d50\u5408\u306f\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u72ec\u7acb\u3057\u3066\u52d5\u4f5c\u3067\u304d\u308b\u3053\u3068\u3092\u53ef\u80fd\u306b\u3059\u308b\u3002\u3053\u308c\u306f\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3068\u30c6\u30b9\u30c8\u306b\u3068\u3063\u3066\u4e0d\u53ef\u6b20\u3067\u3042\u308b\u3002<\/p>\n<ul>\n<li><strong>\u4f9d\u5b58\u95a2\u4fc2\u306e\u6ce8\u5165\uff1a<\/strong>\u30af\u30e9\u30b9\u5185\u3067\u5185\u90e8\u7684\u306b\u4f5c\u6210\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u4ecb\u3057\u3066\u4f9d\u5b58\u95a2\u4fc2\u3092\u30af\u30e9\u30b9\u306b\u6e21\u3059\u3002<\/li>\n<li><strong>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5206\u96e2\uff1a<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30cb\u30fc\u30ba\u306b\u7279\u5316\u3057\u305f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u4f9d\u5b58\u3059\u308b\u3002<\/li>\n<li><strong>\u30a4\u30d9\u30f3\u30c8\u99c6\u52d5\u578b\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\uff1a<\/strong> \u76f4\u63a5\u547c\u3073\u51fa\u3057\u3092\u305b\u305a\u306b\u3001\u30a4\u30d9\u30f3\u30c8\u3092\u4f7f\u3063\u3066\u4ed6\u306e\u30b7\u30b9\u30c6\u30e0\u306b\u5909\u66f4\u3092\u901a\u77e5\u3059\u308b\u3002<\/li>\n<\/ul>\n<p> \u4f9d\u5b58\u6027\u3092\u6ce8\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u5b9f\u88c5\u3092\u7c21\u5358\u306b\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u305f\u3068\u3048\u3070\u3001\u672c\u756a\u30b7\u30b9\u30c6\u30e0\u304c\u672c\u7269\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u4e00\u65b9\u3067\u3001\u30c6\u30b9\u30c8\u3067\u306f\u30e2\u30c3\u30af\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f7f\u7528\u3067\u304d\u3001\u30b3\u30a2\u30ed\u30b8\u30c3\u30af\u3092\u5909\u66f4\u305b\u305a\u306b\u6e08\u3080\u3002<\/p>\n<h2>5. \u96c6\u7d04\u6027\u306e\u7121\u8996 \ud83e\udde9<\/h2>\n<p> 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\u2705<\/h2>\n<p>\u3053\u308c\u3089\u306e\u30df\u30b9\u3092\u907f\u3051\u308b\u306b\u306f\u3001\u81ea\u5236\u5fc3\u3068\u7d99\u7d9a\u7684\u306a\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002\u4ee5\u4e0b\u306f\u3001\u8a2d\u8a08\u30ec\u30d3\u30e5\u30fc\u7528\u306e\u7c21\u5358\u306a\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3067\u3042\u308b\u3002<\/p>\n<ul>\n<li><strong>\u7d99\u627f\u3092\u78ba\u8a8d\u3059\u308b:<\/strong>\u3053\u308c\u306f\u300cis-a\u300d\u95a2\u4fc2\u3067\u3059\u304b\uff1f\u305d\u308c\u3068\u3082\u5408\u6210\u306b\u3059\u308b\u3079\u304d\u3067\u3057\u3087\u3046\u304b\uff1f<\/li>\n<li><strong>\u30ab\u30d7\u30bb\u30eb\u5316\u3092\u78ba\u8a8d\u3059\u308b:<\/strong>\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u3067\u3059\u304b\uff1f<\/li>\n<li><strong>\u30b5\u30a4\u30ba\u3092\u5206\u6790\u3059\u308b:<\/strong>\u3053\u306e\u30af\u30e9\u30b9\u306f\u3042\u307e\u308a\u306b\u3082\u591a\u304f\u306e\u3053\u3068\u3092\u3057\u3066\u3044\u308b\u3067\u3057\u3087\u3046\u304b\uff1f<\/li>\n<li><strong>\u4f9d\u5b58\u95a2\u4fc2\u3092\u78ba\u8a8d\u3059\u308b:<\/strong>\u3053\u306e\u30af\u30e9\u30b9\u306f\u7279\u5b9a\u306e\u4f9d\u5b58\u95a2\u4fc2\u306a\u3057\u3067\u5b9f\u884c\u53ef\u80fd\u3067\u3057\u3087\u3046\u304b\uff1f<\/li>\n<li><strong>\u4e00\u8cab\u6027\u3092\u6e2c\u5b9a\u3059\u308b:<\/strong>\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u660e\u78ba\u306a1\u3064\u306e\u76ee\u7684\u3092\u679c\u305f\u3057\u3066\u3044\u307e\u3059\u304b\uff1f<\/li>\n<\/ul>\n<h2>\u30b7\u30b9\u30c6\u30e0\u5b89\u5b9a\u6027\u306b\u3064\u3044\u3066\u306e\u6700\u7d42\u7684\u306a\u8003\u5bdf 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