{"id":9345,"date":"2025-12-03T17:55:50","date_gmt":"2025-12-03T09:55:50","guid":{"rendered":"https:\/\/www.cybermedian.com\/tw\/class-vs-object-diagram-when-to-use-instances\/"},"modified":"2026-04-14T10:57:22","modified_gmt":"2026-04-14T10:57:22","slug":"class-vs-object-diagram-when-to-use-instances","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/tw\/class-vs-object-diagram-when-to-use-instances\/","title":{"rendered":"\u985e\u5225\u8207\u7269\u4ef6\u5716 &#8211; \u4f55\u6642\u4f7f\u7528\u5be6\u4f8b"},"content":{"rendered":"<p>\u5169\u8005\u7686\u70ba<a href=\"https:\/\/www.cybermedian.com\/mastering-the-uml-class-diagram-syntax-and-examples\/\">UML \u985e\u5225\u5716<\/a> \u4ee5\u53ca<a href=\"https:\/\/www.cybermedian.com\/uml-object-diagram-capturing-a-system-snapshot\/\">UML \u7269\u4ef6\u5716<\/a> \u5c6c\u65bc<strong>\u7d50\u69cb\u5716<\/strong>\uff0c\u8868\u793a\u5b83\u5011\u7528\u4f86\u6a21\u64ec\u7cfb\u7d71\u7684\u7d50\u69cb\u3002\u7136\u800c\uff0c\u5b83\u5011\u7684\u7528\u9014\u6839\u672c\u4e0d\u540c\uff1a\u985e\u5225\u5716\u5b9a\u7fa9\u62bd\u8c61\u7684\u85cd\u5716\uff0c\u800c\u7269\u4ef6\u5716\u5247\u6355\u6349\u67d0\u4e00\u6642\u523b\u7684\u5177\u9ad4\u73fe\u5be6\u3002<\/p>\n<p>\u4e86\u89e3\u4f55\u6642\u4f7f\u7528\u6bcf\u4e00\u7a2e\u5716\u8868\uff0c\u5c0d\u65bc\u6709\u6548\u7684\u7269\u4ef6\u5c0e\u5411\u5206\u6790\u8207\u6e9d\u901a\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2>\u95dc\u4fc2\u8207\u6bd4\u8f03\u7684\u4f9d\u64da<\/h2>\n<h3>\u5be6\u4f8b\u5316\u95dc\u4fc2\uff1a\u898f\u683c\u5230\u5be6\u73fe<\/h3>\n<p>\u985e\u5225\u5716\u8207\u7269\u4ef6\u5716\u7dad\u6301\u8457\u95dc\u9375\u7684<strong>\u5be6\u4f8b\u5316\u95dc\u4fc2<\/strong>\u3002\u985e\u5225\u5716\u4f5c\u70ba<em>\u62bd\u8c61\u898f\u683c<\/em>\uff0c\u5b9a\u7fa9\u5141\u8a31\u7684\u7d50\u69cb\uff0c\u800c\u7269\u4ef6\u5716\u5247\u63d0\u4f9b<em>\u5177\u9ad4\u5be6\u73fe<\/em>\uff0c\u4e26\u7b26\u5408\u9019\u4e9b\u5b9a\u7fa9\u3002<\/p>\n<ul>\n<li><strong>\u985e\u5225\u5716\uff08\u898f\u683c\uff09\uff1a<\/strong>\u5efa\u7acb\u7d50\u69cb\u3001\u5c6c\u6027\u985e\u578b\u3001\u904b\u7b97\uff0c\u4ee5\u53ca\u6240\u6709\u6f5b\u5728\u95dc\u806f\u7684\u591a\u91cd\u6027\u898f\u5247\u3002<\/li>\n<li><strong>\u7269\u4ef6\u5716\uff08\u5be6\u73fe\uff09\uff1a<\/strong>\u5c55\u793a\u5fc5\u9808\u9075\u5faa\u5176\u5c0d\u61c9\u985e\u5225\u6240\u8a2d\u5b9a\u898f\u5247\u7684\u7279\u5b9a\u7269\u4ef6\uff0c\u5448\u73fe\u5be6\u969b\u7684\u5c6c\u6027\u503c\u4ee5\u53ca\u5728\u7279\u5b9a\u57f7\u884c\u6642\u523b\u5f62\u6210\u7684\u7279\u5b9a\u9023\u7d50\uff08\u95dc\u806f\u7684\u5be6\u4f8b\uff09\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u7269\u4ef6\u5716\u7684\u529f\u80fd\u662f\u4f5c\u70ba<strong>\u6a21\u578b\u7b26\u5408\u6027\u9a57\u8b49\u5de5\u5177<\/strong>\uff0c\u7528\u4ee5\u9a57\u8b49\u62bd\u8c61\u7d50\u69cb\u662f\u5426\u7b26\u5408\u7279\u5b9a\u4e14\u5177\u9ad4\u7684\u60c5\u5883\u3002<\/p>\n<h3>\u6bd4\u8f03\u7684\u4f9d\u64da<\/h3>\n<p>\u9700\u8981\u6bd4\u8f03\u9019\u5169\u7a2e\u7d50\u69cb\u5716\u7684\u539f\u56e0\u5728\u65bc\uff0c\u5340\u5206\u62bd\u8c61\u6a21\u578b\u5b9a\u7fa9\u8207\u5177\u9ad4\u5be6\u4f8b\u72c0\u614b\u672c\u8eab\u5177\u6709\u56fa\u6709\u7684\u56f0\u96e3\uff1a<\/p>\n<ol>\n<li><strong>\u7b26\u865f\u4e0a\u7684\u8a9e\u7fa9\u6a21\u7cca\u6027\uff1a<\/strong> \u5169\u7a2e\u5716\u8868\u90fd\u4f7f\u7528\u985e\u4f3c\u7684\u5716\u5f62\u5143\u7d20\uff08\u77e9\u5f62\u8207\u7dda\u689d\uff09\uff0c\u9020\u6210\u8868\u9762\u7684\u8996\u89ba\u76f8\u4f3c\u6027\uff0c\u53ef\u80fd\u63a9\u84cb\u5b83\u5011\u8a9e\u7fa9\u76ee\u7684\u7684\u6839\u672c\u5dee\u7570\uff08\u985e\u578b\u5b9a\u7fa9 vs. \u5be6\u4f8b\u8cc7\u6599\uff09\u3002<\/li>\n<li><strong>\u7bc4\u570d\u7684\u8aa4\u7528\uff1a<\/strong> \u8a2d\u8a08\u5e2b\u7d93\u5e38\u6df7\u6dc6\u76ee\u7684<strong>\u7cfb\u7d71\u5b9a\u7fa9<\/strong> (<a href=\"https:\/\/chat.visual-paradigm.com\/diagram\/uml-class-diagram\/\">\u985e\u5716<\/a>) \u8207<strong>\u8a2d\u8a08\u9a57\u8b49<\/strong> (<a href=\"https:\/\/chat.visual-paradigm.com\/diagram\/uml-object-diagram\/\">\u7269\u4ef6\u5716<\/a>)\uff0c\u5c0e\u81f4\u6548\u7387\u4f4e\u4e0b\u6216\u4e0d\u6b63\u78ba\u7684\u6587\u4ef6\u9078\u64c7\u3002<\/li>\n<li><strong>\u8907\u96dc\u8a2d\u8a08\u9a57\u8b49\uff1a<\/strong> \u9019\u9805\u6bd4\u8f03\u7a81\u986f\u4e86\u7269\u4ef6\u5716\u5728\u9a57\u8b49\u985e\u5716\u8907\u96dc\u6027\u65b9\u9762\u7684\u5c08\u9580\u89d2\u8272\uff0c\u7279\u5225\u662f\u5728\u5c55\u793a\u5982\u805a\u5408\u3001\u7d44\u5408\u53ca\u591a\u91cd\u6027\u9650\u5236\u7b49\u8907\u96dc\u95dc\u4fc2\u7684\u53ef\u884c\u6027\u8207\u5f71\u97ff\u3002<\/li>\n<\/ol>\n<h2>1. \u985e\u5716\uff1a\u62bd\u8c61\u85cd\u5716<\/h2>\n<p>\u985e\u5716\u662fUML\u4e2d\u6700\u91cd\u8981\u7684\u7d50\u69cb\u5716\u3002\u5b83\u4ee3\u8868<strong>\u5b9a\u7fa9<\/strong>\u7cfb\u7d71\u7684\u5b9a\u7fa9\u2014\u2014\u985e\u5225\u3001\u5176\u5c6c\u6027\u3001\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5b83\u5011\u4e4b\u9593\u7684\u975c\u614b\u95dc\u4fc2\u3002<\/p>\n<p id=\"rrSlSrh\"><img alt=\"\" class=\"alignnone size-full wp-image-14535\" decoding=\"async\" height=\"904\" loading=\"lazy\" sizes=\"auto, (max-width: 1218px) 100vw, 1218px\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2025\/12\/img_693007f9d7435.png\" srcset=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2025\/12\/img_693007f9d7435.png 1218w, https:\/\/www.cybermedian.com\/wp-content\/uploads\/2025\/12\/img_693007f9d7435-300x223.png 300w, https:\/\/www.cybermedian.com\/wp-content\/uploads\/2025\/12\/img_693007f9d7435-1024x760.png 1024w, https:\/\/www.cybermedian.com\/wp-content\/uploads\/2025\/12\/img_693007f9d7435-768x570.png 768w\" width=\"1218\"\/><\/p>\n<h3>\u5b83\u6240\u5efa\u6a21\u7684\u5167\u5bb9\uff1a<\/h3>\n<ul>\n<li><strong>\u985e\u5225\uff1a<\/strong> \u62bd\u8c61\u985e\u578b\uff0c\u986f\u793a\u5176\u5c6c\u6027\uff08\u8cc7\u6599\uff09\u8207\u64cd\u4f5c\uff08\u65b9\u6cd5\uff09\u3002<\/li>\n<li><strong>\u95dc\u4fc2\uff1a<\/strong> \u5b9a\u7fa9<em>\u6f5b\u5728<\/em> \u9023\u63a5\uff0c\u4f8b\u5982<strong>\u95dc\u806f<\/strong>\uff08\u4e00\u822c\u9023\u7d50\uff09\uff0c<strong>\u6cdb\u5316<\/strong>\uff08\u7e7c\u627f\uff09\uff0c<strong>\u805a\u5408<\/strong>\uff08\u64c1\u6709\u95dc\u4fc2\uff09\uff0c\u4ee5\u53ca<strong>\u7d44\u5408<\/strong>\uff08\u5f37\u6240\u6709\u6b0a\uff09\u3002<\/li>\n<li><strong>\u591a\u91cd\u6027\uff1a<\/strong> \u6307\u5b9a\u4e00\u500b\u985e\u5225\u7684\u5be6\u4f8b\u53ef\u4ee5\u8207\u53e6\u4e00\u500b\u985e\u5225\u7684\u591a\u5c11\u500b\u5be6\u4f8b\u76f8\u95dc\u806f\uff08\u4f8b\u5982\uff0c$1..*$ \u8868\u793a\u4e00\u5c0d\u591a\uff09\u3002<\/li>\n<\/ul>\n<h3>\u4f55\u6642\u4f7f\u7528\u985e\u5716\uff1a<\/h3>\n<p>\u985e\u5716\u5728\u8a2d\u8a08\u8207\u5be6\u4f5c\u968e\u6bb5\u7528\u65bc\uff1a<\/p>\n<ul>\n<li><strong>\u5b9a\u7fa9\u7cfb\u7d71\u7d50\u69cb\uff1a<\/strong> \u5efa\u7acb\u7cfb\u7d71\u7684\u8a5e\u5f59\uff08\u4e5f\u5c31\u662f\u985e\u5225\uff09\u3002<\/li>\n<li><strong>\u898f\u5283\u5be6\u4f5c\uff1a<\/strong> \u4f5c\u70ba\u64b0\u5beb\u7269\u4ef6\u5c0e\u5411\u8a9e\u8a00\uff08Java\u3001C++\u3001Python \u7b49\uff09\u7a0b\u5f0f\u78bc\u7684\u76f4\u63a5\u8f38\u5165\u3002<\/li>\n<li><strong>\u6a21\u64ec\u696d\u52d9\u9818\u57df\uff1a<\/strong> \u5efa\u7acb\u73fe\u5be6\u4e16\u754c\u5be6\u9ad4\u53ca\u5176\u95dc\u4fc2\u7684\u6982\u5ff5\u5730\u5716\uff08\u9818\u57df\u6a21\u578b\uff09\u3002<\/li>\n<\/ul>\n<p><strong>\u985e\u6bd4\uff1a<\/strong> \u985e\u5716\u5c31\u50cf\u623f\u5b50\u7684\u5efa\u7bc9\u85cd\u5716\u3002\u5b83\u5b9a\u7fa9\u4e86\u623f\u9593\u6578\u91cf\u3001\u5c3a\u5bf8\u8207\u5efa\u6750\uff0c\u4f46\u623f\u5b50\u672c\u8eab\u5c1a\u672a\u5efa\u9020\u5b8c\u6210\u3002<\/p>\n<h2>2. \u7269\u4ef6\u5716\uff1a\u5177\u9ad4\u7684\u5feb\u7167<\/h2>\n<p>\u7269\u4ef6\u5716\u662f\u985e\u5716\u7684\u4e00\u7a2e\u7279\u6b8a\u60c5\u6cc1\u3002\u5b83\u5c08\u6ce8\u65bc<strong>\u5be6\u4f8b<\/strong>\uff08\u7269\u4ef6\uff09\u53ca\u5176\u5728\u7cfb\u7d71\u57f7\u884c\u904e\u7a0b\u4e2d\u67d0\u4e00\u7279\u5b9a\u6642\u523b\u7684\u5177\u9ad4\u9023\u7d50\u3002<\/p>\n<p id=\"FaELrMw\"><img alt=\"\" class=\"alignnone size-full wp-image-14539\" decoding=\"async\" height=\"623\" loading=\"lazy\" sizes=\"auto, (max-width: 514px) 100vw, 514px\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2025\/12\/img_693009219ab3c.png\" srcset=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2025\/12\/img_693009219ab3c.png 514w, https:\/\/www.cybermedian.com\/wp-content\/uploads\/2025\/12\/img_693009219ab3c-248x300.png 248w\" width=\"514\"\/><\/p>\n<h3>\u5b83\u6240\u6a21\u64ec\u7684\u5167\u5bb9\uff1a<\/h3>\n<ul>\n<li><strong>\u7269\u4ef6\uff1a<\/strong>\u985e\u5225\u7684\u547d\u540d\u5be6\u4f8b\uff0c\u4ee5\u5be6\u969b\u7684\u3001\u73fe\u5be6\u4e16\u754c\u7684<strong>\u503c<\/strong>.\n<ul>\n<li><em>\u7b26\u865f\u8868\u793a\uff1a<\/em> \u540d\u7a31\u4ee5\u5e95\u7dda\u6a19\u793a\uff0c\u683c\u5f0f\u5982\u4e0b\uff1a<code>\u7269\u4ef6\u540d\u7a31\uff1a\u985e\u5225\u540d\u7a31<\/code>\uff08\u4f8b\u5982\uff0c<code>order123 : Order<\/code>).<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9023\u7d50\uff1a<\/strong>\u95dc\u806f\u7684\u5177\u9ad4\u5be6\u4f8b\uff0c\u986f\u793a\u54ea\u500b\u7279\u5b9a\u7269\u4ef6\u8207\u53e6\u4e00\u500b\u7279\u5b9a\u7269\u4ef6\u76f8\u9023\u3002<\/li>\n<li><strong>\u72c0\u614b\uff1a<\/strong> \u63cf\u8ff0\u5feb\u7167\u62cd\u651d\u6642\u7cfb\u7d71\u7684\u5be6\u969b\u8cc7\u6599\u72c0\u614b\u3002<\/li>\n<\/ul>\n<h3>\u4f55\u6642\u4f7f\u7528\u7269\u4ef6\u5716\uff1a<\/h3>\n<p>\u7269\u4ef6\u5716\u7528\u65bc\u6e2c\u8a66\u3001\u9a57\u8b49\u548c\u8aaa\u660e\u8907\u96dc\u60c5\u5883\uff1a<\/p>\n<ul>\n<li><strong>\u8aaa\u660e\u8907\u96dc\u7684\u591a\u91cd\u6027\uff1a<\/strong>\u8b49\u660e\u591a\u5c0d\u591a\u95dc\u4fc2\uff08\u5728\u985e\u5716\u4e2d\u5b9a\u7fa9\uff09\u53ef\u4ee5\u6b63\u78ba\u5be6\u4f8b\u5316\u3002<\/li>\n<li><strong>\u9a57\u8b49\u6e2c\u8a66\u6848\u4f8b\uff1a<\/strong>\u986f\u793a\u95dc\u9375\u64cd\u4f5c\u524d\u5f8c\u7269\u4ef6\u7684\u7cbe\u78ba\u72c0\u614b\uff08\u4f8b\u5982\uff0c\u8b49\u660e\u7d50\u5e33\u5f8c\u8cfc\u7269\u8eca\u70ba\u7a7a\uff09\u3002<\/li>\n<li><strong>\u89e3\u91cb\u908a\u754c\u60c5\u6cc1\uff1a<\/strong>\u4ee5\u8996\u89ba\u65b9\u5f0f\u5c55\u793a\u7269\u4ef6\u7684\u7570\u5e38\u914d\u7f6e\uff08\u4f8b\u5982\uff0c\u4e00\u500b\u5ba2\u6236\u7269\u4ef6\u70ba\u7a7a\u7684\u8a02\u55ae\uff09\u3002<\/li>\n<\/ul>\n<p><strong>\u985e\u6bd4\uff1a<\/strong> \u7269\u4ef6\u5716\u5c31\u50cf\u4e00\u5f35\u5bb6\u5177\u9f4a\u5168\u4e14\u6709\u4eba\u5c45\u4f4f\u7684\u5be6\u969b\u623f\u5c4b\u7684\u7167\u7247\u3002\u5b83\u986f\u793a\u9019\u68df\u623f\u5c4b\u6709\u85cd\u8272\u5857\u6599\uff0c<em>\u9019<\/em>\u68df\u7279\u5b9a\u623f\u5c4b\u6709\u85cd\u8272\u5857\u6599\uff0c<em>\u9019<\/em>\u68df\u7279\u5b9a\u5c4b\u9802\uff0c\u4ee5\u53ca<em>\u9019<\/em>\u68df\u7279\u5b9a\u7684\u5bb6\u5177\u914d\u7f6e\u3002<\/p>\n<h2>3. 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