{"id":1117,"date":"2026-03-30T09:12:57","date_gmt":"2026-03-30T09:12:57","guid":{"rendered":"https:\/\/www.method-post.com\/ja\/troubleshooting-class-diagram-relationships\/"},"modified":"2026-03-30T09:12:57","modified_gmt":"2026-03-30T09:12:57","slug":"troubleshooting-class-diagram-relationships","status":"publish","type":"post","link":"https:\/\/www.method-post.com\/ja\/troubleshooting-class-diagram-relationships\/","title":{"rendered":"\u30af\u30e9\u30b9\u56f3\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\uff1a\u95a2\u4fc2\u6027\u304c\u5931\u6557\u3059\u308b\u7406\u7531\u3068\u305d\u306e\u4fee\u6b63\u65b9\u6cd5"},"content":{"rendered":"<p>\u5805\u7262\u306a\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u8a2d\u8a08\u3059\u308b\u306b\u306f\u660e\u78ba\u3055\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306e\u8a2d\u8a08\u56f3\u304c\u66d6\u6627\u306a\u5834\u5408\u3001\u7d50\u679c\u3068\u3057\u3066\u30b3\u30fc\u30c9\u306f\u5f37\u3044\u7d50\u5408\u3001\u4fdd\u5b88\u306e\u56f0\u96e3\u3001\u8ad6\u7406\u7684\u306a\u4e0d\u6574\u5408\u3092\u62b1\u3048\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u30af\u30e9\u30b9\u56f3\u306f\u5358\u306a\u308b\u56f3\u9762\u4f5c\u6210\u306e\u4f5c\u696d\u3067\u306f\u306a\u304f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3069\u306e\u3088\u3046\u306b\u76f8\u4e92\u4f5c\u7528\u3057\u3001\u7d99\u627f\u3057\u3001\u4e92\u3044\u306b\u4f9d\u5b58\u3059\u308b\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u30c4\u30fc\u30eb\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u591a\u304f\u306e\u958b\u767a\u8005\u304c\u3001\u5b9f\u88c5\u3068\u77db\u76fe\u3059\u308b\u3088\u3046\u306b\u898b\u3048\u308b\u95a2\u4fc2\u6027\u3092\u6301\u3064\u56f3\u306e\u524d\u3067\u7acb\u3061\u5c3d\u304f\u3057\u3066\u3057\u307e\u3046\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001UML\u30af\u30e9\u30b9\u30e2\u30c7\u30ea\u30f3\u30b0\u306b\u304a\u3051\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u69cb\u9020\u7684\u5931\u6557\u306b\u3064\u3044\u3066\u53d6\u308a\u4e0a\u3052\u307e\u3059\u3002\u8868\u9762\u7684\u306a\u7f8e\u3057\u3055\u3092\u8d85\u3048\u3066\u3001\u5404\u7dda\u3084\u77e2\u5370\u306e\u80cc\u5f8c\u306b\u3042\u308b\u8ad6\u7406\u3001\u57fa\u6570\u3001\u610f\u5473\u8ad6\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u65e9\u671f\u306b\u7279\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u5168\u4f53\u306b\u308f\u305f\u308a\u3001\u8a2d\u8a08\u304c\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u304b\u3064\u4fdd\u5b88\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Marker-style infographic illustrating UML class diagram troubleshooting: shows five core relationship types (association, aggregation, composition, inheritance, dependency) with notation symbols, highlights three common pitfalls (inheritance vs composition confusion, circular dependencies, ambiguous multiplicity), presents a 3-step troubleshooting workflow, and includes a validation checklist for software architects and developers\" decoding=\"async\" src=\"https:\/\/www.method-post.com\/wp-content\/uploads\/2026\/03\/class-diagram-troubleshooting-infographic-marker-illustration.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83e\udde9 \u30b3\u30a2\u3068\u306a\u308b\u95a2\u4fc2\u6027\u306e\u7a2e\u985e\u3092\u7406\u89e3\u3059\u308b<\/h2>\n<p>\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u884c\u3046\u524d\u306b\u3001\u30af\u30e9\u30b9\u95a2\u4fc2\u6027\u306e\u6a19\u6e96\u7684\u306a\u7528\u8a9e\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u8a9e\u304c\u4e92\u63db\u7684\u306b\u4f7f\u308f\u308c\u305f\u308a\u3001\u8996\u899a\u7684\u306a\u8a18\u53f7\u304c\u610f\u56f3\u3055\u308c\u305f\u610f\u5473\u3068\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u308a\u3059\u308b\u3068\u3001\u6df7\u4e71\u304c\u751f\u3058\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u3042\u306a\u305f\u304c\u906d\u9047\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u4e3b\u306a\u95a2\u4fc2\u6027\u306e\u7a2e\u985e\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u95a2\u4fc2\u6027\u306e\u7a2e\u985e<\/th>\n<th>\u8868\u8a18\u6cd5<\/th>\n<th>\u610f\u5473\u8ad6\u7684\u610f\u5473<\/th>\n<th>\u5178\u578b\u7684\u306a\u4f7f\u7528\u4f8b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u95a2\u9023<\/td>\n<td>\u7dda<\/td>\n<td>2\u3064\u306e\u30af\u30e9\u30b9\u9593\u306e\u69cb\u9020\u7684\u63a5\u7d9a\u3002<\/td>\n<td>\u9867\u5ba2\u304c\u6ce8\u6587\u3092\u767a\u6ce8\u3059\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u96c6\u7d04<\/td>\n<td>\u7a7a\u5fc3\u306e\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9<\/td>\n<td>\u90e8\u5206\u304c\u72ec\u7acb\u3057\u3066\u5b58\u5728\u3059\u308b\u5168\u4f53-\u90e8\u5206\u95a2\u4fc2\u3002<\/td>\n<td>\u90e8\u7f72\u306b\u306f\u5f93\u696d\u54e1\u304c\u3044\u308b\uff08\u5f93\u696d\u54e1\u306f\u90e8\u7f72\u3092\u96e2\u308c\u308b\uff09\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u5408\u6210<\/td>\n<td>\u5857\u308a\u3064\u3076\u3055\u308c\u305f\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9<\/td>\n<td>\u5f37\u3044\u5168\u4f53-\u90e8\u5206\u95a2\u4fc2\u3002\u90e8\u5206\u306f\u5168\u4f53\u304c\u306a\u3051\u308c\u3070\u5b58\u7d9a\u3057\u306a\u3044\u3002<\/td>\n<td>\u5bb6\u306b\u306f\u90e8\u5c4b\u304c\u3042\u308b\uff08\u5bb6\u304c\u53d6\u308a\u58ca\u3055\u308c\u308b\u3068\u90e8\u5c4b\u3082\u5b58\u5728\u3057\u306a\u304f\u306a\u308b\uff09\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u7d99\u627f<\/td>\n<td>\u7a7a\u5fc3\u306e\u4e09\u89d2\u5f62\u3092\u5099\u3048\u305f\u7dda<\/td>\n<td>\u300c\u306f-\u3067\u3042\u308b\u300d\u95a2\u4fc2\u3002\u89aa\u30af\u30e9\u30b9\u304c\u5171\u901a\u306e\u69cb\u9020\u3092\u63d0\u4f9b\u3059\u308b\u3002<\/td>\n<td>\u8eca\u306f\u8eca\u4e21\u3067\u3042\u308b\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u4f9d\u5b58\u95a2\u4fc2<\/td>\n<td>\u77e2\u5370\u4ed8\u304d\u306e\u7834\u7dda<\/td>\n<td>\u4f7f\u7528\u95a2\u4fc2\u30021\u3064\u306e\u30af\u30e9\u30b9\u304c\u5225\u306e\u30af\u30e9\u30b9\u3092\u4e00\u6642\u7684\u306b\u4f7f\u7528\u3059\u308b\u3002<\/td>\n<td>\u30ec\u30dd\u30fc\u30c8\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u4f7f\u7528\u3059\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83d\udd0d \u95a2\u4fc2\u6027\u30e2\u30c7\u30ea\u30f3\u30b0\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74<\/h2>\n<p>\u56f3\u304c\u5931\u6557\u3059\u308b\u5834\u5408\u3001\u305d\u308c\u306f\u901a\u5e38\u3001\u8996\u899a\u7684\u8868\u73fe\u3068\u30b7\u30b9\u30c6\u30e0\u306e\u8ad6\u7406\u7684\u73fe\u5b9f\u3068\u306e\u9593\u306b\u4e56\u96e2\u304c\u3042\u308b\u305f\u3081\u3067\u3042\u308b\u3002\u4ee5\u4e0b\u306f\u3001\u95a2\u4fc2\u304c\u5d29\u58ca\u3059\u308b\u5177\u4f53\u7684\u306a\u72b6\u6cc1\u3067\u3042\u308b\u3002<\/p>\n<h3>1. \u7d99\u627f\u3068\u7d44\u6210\u306e\u6df7\u4e71<\/h3>\n<p>\u3053\u308c\u306f\u304a\u305d\u3089\u304f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08\u3067\u6700\u3082\u983b\u7e41\u306b\u8d77\u3053\u308b\u8aa4\u308a\u3067\u3042\u308b\u3002\u958b\u767a\u8005\u306f\u3001\u7d44\u6210\u3092\u4f7f\u3046\u3079\u304d\u3068\u304d\u306b\u7d99\u627f\u3092\u3001\u9006\u306b\u7d99\u627f\u3092\u4f7f\u3046\u3079\u304d\u3068\u304d\u306b\u7d44\u6210\u3092\u4f7f\u3046\u50be\u5411\u304c\u3042\u308b\u3002\u3053\u306e\u9078\u629e\u306f\u3001\u30af\u30e9\u30b9\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u3068\u7d50\u5408\u306e\u6df1\u3055\u3092\u6c7a\u5b9a\u3059\u308b\u3002<\/p>\n<ul>\n<li><strong>\u75c7\u72b6\uff1a<\/strong> \u3042\u306a\u305f\u306f <code>WingedLion<\/code> \u3068\u3044\u3046\u30af\u30e9\u30b9\u304c\u3042\u308a\u3001<code>Animal<\/code> \u3068<code>Machine<\/code> \u304b\u3089\u7d99\u627f\u3057\u3066\u3044\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u7d99\u627f\u554f\u984c\u3084\u8ad6\u7406\u7684\u77db\u76fe\uff08\u30e9\u30a4\u30aa\u30f3\u306f\u6a5f\u68b0\u306a\u306e\u304b\uff1f\uff09\u304c\u751f\u3058\u308b\u3002<\/li>\n<li><strong>\u5f71\u97ff\uff1a<\/strong>\u89aa\u30af\u30e9\u30b9\u3078\u306e\u5f37\u3044\u7d50\u5408\u3001\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u6642\u306e\u8106\u5f31\u6027\u3001\u304a\u3088\u3073\u30ea\u30b9\u30b3\u30d5\u306e\u7f6e\u63db\u539f\u5247\u306e\u9055\u53cd\u3002<\/li>\n<li><strong>\u4fee\u6b63\u65b9\u6cd5\uff1a<\/strong> \u81ea\u554f\u3057\u3066\u307f\u3088\u3046\uff1a\u300c\u3053\u308c\u306f <em>is-a<\/em> \u306e\u95a2\u4fc2\u306a\u306e\u304b\uff1f\u300d\u3082\u3057 <code>Car<\/code> \u304c\u3059\u3079\u3066\u306e\u6587\u8108\u3067\u53b3\u5bc6\u306b <code>Vehicle<\/code> \u3067\u3042\u308b\u3068\u306f\u9650\u3089\u306a\u3044\u306a\u3089\u3001\u7d44\u6210\u3092\u691c\u8a0e\u3059\u3079\u304d\u3067\u3042\u308b\u3002\u3082\u3057 <code>Car<\/code> \u306b <code>Engine<\/code> \u304c\u3042\u308b\u306a\u3089\u3001\u30a8\u30f3\u30b8\u30f3\u306f\u89aa\u30af\u30e9\u30b9\u3067\u306f\u306a\u304f\u90e8\u54c1\u3067\u3042\u308b\u3002\u300e\u6301\u3064\u300f\u95a2\u4fc2\u306b\u306f\u7d44\u6210\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<\/ul>\n<h3>2. \u5186\u74b0\u4f9d\u5b58<\/h3>\n<p>\u4f9d\u5b58\u95a2\u4fc2\u306f\u4e00\u65b9\u901a\u884c\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u30af\u30e9\u30b9A\u304c\u30af\u30e9\u30b9B\u306b\u4f9d\u5b58\u3057\u3001\u30af\u30e9\u30b9B\u304c\u30af\u30e9\u30b9A\u306b\u4f9d\u5b58\u3059\u308b\u5834\u5408\u3001\u5faa\u74b0\u53c2\u7167\u304c\u751f\u3058\u308b\u3002\u3053\u308c\u306f\u521d\u671f\u5316\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u304b\u3001\u30d6\u30fc\u30c8\u30b9\u30c8\u30e9\u30c3\u30d7\u51e6\u7406\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u8907\u96d1\u306a\u4f9d\u5b58\u95a2\u4fc2\u306e\u6ce8\u5165\u30d1\u30bf\u30fc\u30f3\u304c\u5fc5\u8981\u306b\u306a\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/p>\n<ul>\n<li><strong>\u75c7\u72b6\uff1a<\/strong> \u4f9d\u5b58\u95a2\u4fc2\u30b0\u30e9\u30d5\u306b\u30eb\u30fc\u30d7\u304c\u3042\u308b\u3002B\u306a\u3057\u3067\u306fA\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3067\u304d\u306a\u3044\u3057\u3001A\u306a\u3057\u3067\u306fB\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3067\u304d\u306a\u3044\u3002<\/li>\n<li><strong>\u5f71\u97ff\uff1a<\/strong> \u6a5f\u80fd\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u304c\u4f4e\u4e0b\u3057\u3001\u500b\u3005\u306e\u30e6\u30cb\u30c3\u30c8\u306e\u30c6\u30b9\u30c8\u304c\u96e3\u3057\u304f\u306a\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u4f5c\u6210\u6642\u306b\u30b9\u30bf\u30c3\u30af\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e\u53ef\u80fd\u6027\u304c\u751f\u3058\u308b\u3002<\/li>\n<li><strong>\u4fee\u6b63\u65b9\u6cd5\uff1a<\/strong> \u5171\u901a\u306e\u30ed\u30b8\u30c3\u30af\u3092\u3001\u7b2c\u4e09\u306e\u72ec\u7acb\u3057\u305f\u30af\u30e9\u30b9\uff08\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u307e\u305f\u306f\u62bd\u8c61\u57fa\u5e95\u30af\u30e9\u30b9\uff09\u306b\u62bd\u51fa\u3059\u308b\u3002A\u3068B\u306e\u4e21\u65b9\u304c\u3053\u306e\u65b0\u3057\u3044\u62bd\u8c61\u5316\u306b\u4f9d\u5b58\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u308c\u3089\u306e\u9593\u306e\u76f4\u63a5\u7684\u306a\u30ea\u30f3\u30af\u3092\u65ad\u3064\u3002\u3042\u308b\u3044\u306f\u3001\u76f8\u4e92\u4f5c\u7528\u3092\u7ba1\u7406\u3059\u308b\u4e2d\u9593\u30b5\u30fc\u30d3\u30b9\u3092\u5c0e\u5165\u3059\u308b\u3002<\/li>\n<\/ul>\n<h3>3. 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<code>\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb<\/code>\u3001\u3069\u3061\u3089\u304c\u3069\u3061\u3089\u3092\u77e5\u3063\u3066\u3044\u308b\u306e\u304b\uff1f<\/p>\n<ul>\n<li>\u306f\u3001<code>\u30e6\u30fc\u30b6\u30fc<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3001<code>\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb<\/code>?<\/li>\n<li>\u306f\u3001<code>\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3001<code>\u30e6\u30fc\u30b6\u30fc<\/code>?<\/li>\n<\/ul>\n<p>\u4e21\u65b9\u304c\u771f\u3067\u3042\u308c\u3070\u3001\u53cc\u65b9\u5411\u95a2\u9023\u304c\u5fc5\u8981\u3067\u3059\u3002\u7247\u65b9\u3060\u3051\u304c\u771f\u3067\u3042\u308c\u3070\u3001\u77e2\u5370\u304c\u4f9d\u5b58\u3059\u308b\u30af\u30e9\u30b9\u304b\u3089\u77e5\u3089\u308c\u3066\u3044\u308b\u30af\u30e9\u30b9\u3078\u5411\u304b\u3046\u3088\u3046\u306b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u591a\u304f\u306e\u5834\u5408\u3001\u56f3\u3067\u306f\u6b63\u5f53\u306a\u7406\u7531\u306a\u304f\u4e21\u65b9\u5411\u306b\u77e2\u5370\u304c\u63cf\u304b\u308c\u3001\u8996\u899a\u7684\u306a\u3054\u3061\u3083\u3054\u3061\u3083\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d72\uff1a\u53ef\u8996\u6027\u4fee\u98fe\u5b50\u306e\u78ba\u8a8d<\/h3>\n<p>\u53ef\u8996\u6027\uff08public\u3001private\u3001protected\uff09\u306f\u9ad8\u30ec\u30d9\u30eb\u306e\u56f3\u3067\u306f\u3057\u3070\u3057\u3070\u7701\u7565\u3055\u308c\u307e\u3059\u304c\u3001\u5b9f\u88c5\u306e\u5931\u6557\u3092\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3059\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u95a2\u4fc2\u6027\u304c\u76f8\u4e92\u4f5c\u7528\u3092\u610f\u5473\u3059\u308b\u5834\u5408\u3001\u305d\u306e\u5c5e\u6027\u306f\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<ul>\n<li>\u95a2\u4fc2\u6027\u304c\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u3092\u610f\u5473\u3057\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u306f<code>public<\/code>?<\/li>\n<li>\u95a2\u4fc2\u6027\u304c\u30d5\u30a3\u30fc\u30eb\u30c9\u30a2\u30af\u30bb\u30b9\u3092\u610f\u5473\u3057\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306f<code>private<\/code>?<\/li>\n<\/ul>\n<p>\u56f3\u304cprivate\u30d5\u30a3\u30fc\u30eb\u30c9\u3078\u306e\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3092\u793a\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u8a2d\u8a08\u306b\u554f\u984c\u304c\u3042\u308a\u307e\u3059\u3002\u30b2\u30c3\u30bf\u30fc\u307e\u305f\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u30b9\u30c6\u30c3\u30d73\uff1a\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u5236\u7d04\u306e\u78ba\u8a8d<\/h3>\n<p>\u96c6\u7d04\u3068\u69cb\u6210\u306f\u3001\u3069\u3061\u3089\u3082\u300c\u90e8\u5206-\u5168\u4f53\u300d\u95a2\u4fc2\u306e\u3088\u3046\u306b\u898b\u3048\u308b\u305f\u3081\u3001\u3057\u3070\u3057\u3070\u6df7\u540c\u3055\u308c\u307e\u3059\u3002\u9055\u3044\u306f\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u69cb\u6210\uff1a<\/strong> 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\u6df1\u5165\u89e3\u8aac\uff1a\u95a2\u9023\u3068\u57fa\u6570<\/h2>\n<p>\u95a2\u9023\u306f\u30af\u30e9\u30b9\u56f3\u306e\u9aa8\u683c\u3067\u3059\u3002\u69cb\u9020\u7684\u306a\u30ea\u30f3\u30af\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u95a2\u9023\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u306f\u3001\u30c7\u30fc\u30bf\u306b\u8ab2\u3055\u308c\u305f\u5236\u7d04\u306b\u6ce8\u76ee\u3059\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<h3>\u591a\u5bfe\u591a\u306e\u95a2\u4fc2<\/h3>\n<p>\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30b0\u30e9\u30d5\u3067\u3001\u591a\u5bfe\u591a\u306e\u95a2\u4fc2\uff08\u4f8b\uff1a\u751f\u5f92\u3068\u6388\u696d\uff09\u3092\u76f4\u63a5\u30e2\u30c7\u30eb\u5316\u3059\u308b\u5834\u5408\u3001\u3057\u3070\u3057\u3070\u4e2d\u9593\u30af\u30e9\u30b9\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u30af\u30e9\u30b9\u56f3\u3067\u306f\u3001\u3053\u306e\u95a2\u4fc2\u306f\u4e21\u7aef\u306b\u300c\u300d\u304c\u3042\u308b\u76f4\u63a5\u306e\u7dda\u3068\u3057\u3066\u8868\u73fe\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<code>*<\/code>\u304c\u4e21\u7aef\u306b\u3042\u308b\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u5b9f\u88c5\u3067\u306f\u3001\u3053\u306e\u95a2\u4fc2\u3092\u7d50\u3076\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u304c\u5fc5\u8981\u306b\u306a\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u554f\u984c\u70b9\uff1a<\/strong>\u95a2\u9023\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\uff08\u4f8b\uff1a\u751f\u5f92\u304c\u6388\u696d\u306b\u767b\u9332\u3057\u305f\u65e5\u4ed8\uff09\u3092\u3001\u7dda\u305d\u306e\u3082\u306e\u306b\u683c\u7d0d\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<li><strong>\u89e3\u6c7a\u7b56\uff1a<\/strong>\u95a2\u9023\u30af\u30e9\u30b9\u3092\u5c0e\u5165\u3057\u307e\u3059\u3002\u65b0\u3057\u3044\u30af\u30e9\u30b9\uff08\u4f8b\uff1a<code>\u767b\u9332<\/code>\uff09\u3092\u4f5c\u6210\u3057\u3001<code>\u751f\u5f92<\/code>\u3068<code>\u6388\u696d<\/code>\u3092\u7d50\u3073\u307e\u3059\u3002\u3053\u306e\u30af\u30e9\u30b9\u306f\u3001\u95a2\u9023\u306e\u7279\u5b9a\u306e\u5c5e\u6027\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u5fc5\u9808\u306e\u30ea\u30f3\u30af<\/h3>\n<p>\u5fc5\u9808\uff081\uff09\u3068\u30aa\u30d7\u30b7\u30e7\u30f3\uff080..1\uff09\u306e\u95a2\u4fc2\u3092\u6df7\u540c\u3059\u308b\u3068\u3001\u691c\u8a3c\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30b7\u30ca\u30ea\u30aa\uff1a<\/strong>\u3042\u308b<code>\u9280\u884c\u53e3\u5ea7<\/code>\u306f<code>\u9867\u5ba2<\/code>.<\/li>\n<li><strong>\u8cea\u554f\uff1a<\/strong>\u9867\u5ba2\u306f\u53e3\u5ea7\u3092\u6301\u305f\u305a\u306b\u5b58\u5728\u3067\u304d\u308b\u304b\uff1f<\/li>\n<li><strong>\u8a2d\u8a08\uff1a<\/strong>\u3082\u3057\u300c\u306f\u3044\u300d\u3067\u3042\u308c\u3070\u3001\u9867\u5ba2\u304b\u3089\u53e3\u5ea7\u3078\u306e\u30ea\u30f3\u30af\u306f<code>0..1<\/code>\u3067\u3059\u3002\u3082\u3057\u300c\u3044\u3044\u3048\u300d\u3067\u3042\u308c\u3070\u3001<code>1<\/code>.<\/li>\n<\/ul>\n<p>\u5fc5\u9808\u30ea\u30f3\u30af\u3092\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u3057\u3066\u8aa4\u3063\u3066\u30de\u30fc\u30af\u3059\u308b\u3068\u3001\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3067\u30c7\u30fc\u30bf\u304c\u5fc5\u8981\u306a\u5834\u6240\u306bnull\u5024\u304c\u8a31\u53ef\u3055\u308c\u308b\u3002\u30aa\u30d7\u30b7\u30e7\u30f3\u30ea\u30f3\u30af\u3092\u5fc5\u9808\u3068\u3057\u3066\u8aa4\u3063\u3066\u30de\u30fc\u30af\u3059\u308b\u3068\u3001\u5b58\u5728\u3057\u306a\u3044\u53ef\u80fd\u6027\u306e\u3042\u308b\u30c7\u30fc\u30bf\u5165\u529b\u3092\u5f37\u5236\u3059\u308b\u3053\u3068\u306b\u306a\u308b\u3002<\/p>\n<h2>\ud83d\udd04 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<code>\u30ec\u30dd\u30fc\u30c8\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf<\/code> \u306f\u76f4\u63a5\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308b <code>MySQLConnection<\/code> \u76f4\u63a5\u3002<\/li>\n<li><strong>\u826f\u3044\u30d1\u30bf\u30fc\u30f3\uff1a<\/strong> <code>\u30ec\u30dd\u30fc\u30c8\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf<\/code> \u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u4f9d\u5b58\u3059\u308b <code>DatabaseConnection<\/code>.<\/li>\n<\/ul>\n<p>\u56f3\u304c\u9ad8\u30ec\u30d9\u30eb\u306e\u30af\u30e9\u30b9\u304b\u3089\u7279\u5b9a\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u3078\u306e\u7834\u7dda\u3092\u793a\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3078\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u691c\u8a0e\u3059\u308b\u3079\u304d\u3067\u3042\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u7d50\u5408\u5ea6\u304c\u4f4e\u4e0b\u3057\u3001\u57fa\u76e4\u6280\u8853\u306e\u5909\u66f4\u306b\u5bfe\u3057\u3066\u3082\u56f3\u304c\u3088\u308a\u67d4\u8edf\u306b\u306a\u308b\u3002<\/p>\n<h3>\u63a8\u79fb\u7684\u4f9d\u5b58\u95a2\u4fc2<\/h3>\n<p>\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u306f\u3001\u9593\u63a5\u7684\u306a\u95a2\u4fc2\u306b\u7dda\u3092\u5f15\u304f\u3053\u3068\u3067\u3042\u308b\u3002\u30af\u30e9\u30b9A\u304c\u30af\u30e9\u30b9B\u3092\u4f7f\u7528\u3057\u3001\u30af\u30e9\u30b9B\u304c\u30af\u30e9\u30b9C\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001A\u304b\u3089C\u3078\u306e\u7dda\u3092\u5f15\u304f\u5fc5\u8981\u306f\u306a\u3044\u3002<\/p>\n<ul>\n<li><strong>\u30eb\u30fc\u30eb\uff1a<\/strong> 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\u8996\u899a\u7684\u660e\u78ba\u6027\u3068\u4fdd\u5b88\u6027<\/h2>\n<p>\u8aad\u307f\u53d6\u308c\u306a\u3044\u56f3\u306f\u3001\u56f3\u304c\u306a\u3044\u306e\u3068\u540c\u3058\u3067\u3042\u308b\u3002\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u969b\u306f\u3001\u8996\u899a\u7684\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u3092\u30c7\u30d0\u30c3\u30b0\u30c4\u30fc\u30eb\u3068\u3057\u3066\u8003\u3048\u308b\u3079\u304d\u3067\u3042\u308b\u3002<\/p>\n<h3>\u7dda\u306e\u4ea4\u5dee<\/h3>\n<p>\u95a2\u4fc2\u6027\u306e\u7dda\u304c\u63a5\u70b9\u306a\u3057\u306b\u4ea4\u5dee\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u95a2\u4fc2\u6027\u304c\u5b58\u5728\u3057\u306a\u3044\u3053\u3068\u3092\u793a\u3059\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u306b\u3088\u308a\u8996\u899a\u7684\u306a\u30ce\u30a4\u30ba\u304c\u751f\u3058\u308b\u3002<\/p>\n<ul>\n<li><strong>\u6226\u7565\uff1a<\/strong> \u4ea4\u5dee\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u305f\u3081\u306b\u3001\u300c\u76f4\u4ea4\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u300d\u30b9\u30bf\u30a4\u30eb\uff08\u6c34\u5e73\u304a\u3088\u3073\u5782\u76f4\u65b9\u5411\u306b\u306e\u307f\u79fb\u52d5\u3059\u308b\u7dda\uff09\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<li><strong>\u6226\u7565\uff1a<\/strong> \u7dda\u304c\u4ea4\u5dee\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u5b9f\u969b\u306e\u4ea4\u5dee\u70b9\uff08\u901a\u5e38\u306f3\u9805\u95a2\u4fc2\u307e\u305f\u306f\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30d1\u30b9\u3092\u610f\u5473\u3059\u308b\uff09\u3068\u660e\u78ba\u306b\u533a\u5225\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<h3>\u30b0\u30eb\u30fc\u30d7\u5316\u3068\u30d1\u30c3\u30b1\u30fc\u30b8<\/h3>\n<p>\u30b7\u30b9\u30c6\u30e0\u304c\u62e1\u5927\u3059\u308b\u306b\u3064\u308c\u3066\u30011\u3064\u306e\u56f3\u3067\u306f\u60c5\u5831\u304c\u904e\u5270\u306b\u306a\u308a\u3001\u7279\u5b9a\u306e\u30af\u30e9\u30b9\u3092\u7279\u5b9a\u3067\u304d\u306a\u3051\u308c\u3070\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306f\u4e0d\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u5229\u7528\uff1a<\/strong> \u95a2\u9023\u3059\u308b\u30af\u30e9\u30b9\u3092\u8ad6\u7406\u7684\u306a\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u4f8b\uff1a<code>\u30c9\u30e1\u30a4\u30f3<\/code>, <code>\u30b5\u30fc\u30d3\u30b9<\/code>, <code>\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3<\/code>).<\/li>\n<li><strong>\u30b5\u30d6\u56f3\u306e\u5229\u7528\uff1a<\/strong> 1\u3064\u306e\u30d3\u30e5\u30fc\u306b\u3059\u3079\u3066\u306e\u8a73\u7d30\u3092\u8868\u793a\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u9ad8\u30ec\u30d9\u30eb\u306e\u6982\u8981\u56f3\u3092\u4f5c\u6210\u3057\u3001\u8a73\u7d30\u306a\u95a2\u4fc2\u3092\u7279\u5b9a\u306e\u30b5\u30d6\u30b7\u30b9\u30c6\u30e0\u306b\u6398\u308a\u4e0b\u3052\u3066\u8868\u793a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udee0 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\u56f3\u306e\u691c\u8a3c\u7528\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\n<p>\u30e2\u30c7\u30eb\u3092\u6700\u7d42\u5316\u3059\u308b\u524d\u306b\u3001\u3053\u306e\u691c\u8a3c\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u5b9f\u884c\u3057\u3066\u4e00\u822c\u7684\u306a\u8aa4\u308a\u3092\u767a\u898b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li>\u25a1 \u3059\u3079\u3066\u306e\u95a2\u4fc2\u7dda\u304c\u305d\u306e\u591a\u91cd\u6027\u3067\u30e9\u30d9\u30eb\u4ed8\u3051\u3055\u308c\u3066\u3044\u307e\u3059\u304b\uff1f<\/li>\n<li>\u25a1 \u77e2\u5370\u306f\u4f9d\u5b58\u95a2\u4fc2\u306e\u6b63\u3057\u3044\u65b9\u5411\u3092\u6307\u3057\u3066\u3044\u307e\u3059\u304b\uff1f<\/li>\n<li>\u25a1 \u7d99\u627f\u968e\u5c64\u306f\u53b3\u5bc6\u306b\u300c\u306f-a\u300d\u95a2\u4fc2\u3067\u3059\u304b\uff1f<\/li>\n<li>\u25a1 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