{"id":9538,"date":"2025-12-03T17:55:50","date_gmt":"2025-12-03T09:55:50","guid":{"rendered":"https:\/\/www.cybermedian.com\/cn\/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\/cn\/class-vs-object-diagram-when-to-use-instances\/","title":{"rendered":"\u7c7b\u56fe\u4e0e\u5bf9\u8c61\u56fe &#8211; \u4f55\u65f6\u4f7f\u7528\u5b9e\u4f8b"},"content":{"rendered":"<p>\u4e24\u8005\u90fd\u662f<a href=\"https:\/\/www.cybermedian.com\/mastering-the-uml-class-diagram-syntax-and-examples\/\">UML \u7c7b\u56fe<\/a> \u4ee5\u53ca<a href=\"https:\/\/www.cybermedian.com\/uml-object-diagram-capturing-a-system-snapshot\/\">UML \u5bf9\u8c61\u56fe<\/a> \u5c5e\u4e8e<strong>\u7ed3\u6784\u56fe<\/strong>\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u7528\u4e8e\u5efa\u6a21\u7cfb\u7edf\u7684\u7ed3\u6784\u3002\u7136\u800c\uff0c\u5b83\u4eec\u7684\u6839\u672c\u7528\u9014\u4e0d\u540c\uff1a\u7c7b\u56fe\u5b9a\u4e49\u4e86\u62bd\u8c61\u7684\u84dd\u56fe\uff0c\u800c\u5bf9\u8c61\u56fe\u5219\u6355\u6349\u4e86\u67d0\u4e00\u65f6\u523b\u7684\u5177\u4f53\u73b0\u5b9e\u3002<\/p>\n<p>\u7406\u89e3\u4f55\u65f6\u4f7f\u7528\u6bcf\u79cd\u56fe\u5bf9\u4e8e\u6709\u6548\u7684\u9762\u5411\u5bf9\u8c61\u5206\u6790\u548c\u6c9f\u901a\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<h2>\u5bf9\u6bd4\u5173\u7cfb\u4e0e\u5bf9\u6bd4\u7406\u7531<\/h2>\n<h3>\u5b9e\u4f8b\u5316\u5173\u7cfb\uff1a\u4ece\u89c4\u8303\u5230\u5b9e\u73b0<\/h3>\n<p>\u7c7b\u56fe\u548c\u5bf9\u8c61\u56fe\u4fdd\u6301\u4e00\u79cd\u5173\u952e\u7684<strong>\u5b9e\u4f8b\u5316\u5173\u7cfb<\/strong>\u3002\u7c7b\u56fe\u4f5c\u4e3a<em>\u62bd\u8c61\u89c4\u8303<\/em>\uff0c\u5b9a\u4e49\u4e86\u5141\u8bb8\u7684\u7ed3\u6784\uff0c\u800c\u5bf9\u8c61\u56fe\u5219\u63d0\u4f9b\u4e86\u4e00\u79cd<em>\u5177\u4f53\u5b9e\u73b0<\/em>\uff0c\u8be5\u5b9e\u73b0\u7b26\u5408\u8fd9\u4e9b\u5b9a\u4e49\u3002<\/p>\n<ul>\n<li><strong>\u7c7b\u56fe\uff08\u89c4\u8303\uff09\uff1a<\/strong> \u786e\u7acb\u4e86\u7ed3\u6784\u3001\u5c5e\u6027\u7c7b\u578b\u3001\u64cd\u4f5c\u4ee5\u53ca\u6240\u6709\u6f5c\u5728\u5173\u8054\u7684\u591a\u91cd\u6027\u89c4\u5219\u3002<\/li>\n<li><strong>\u5bf9\u8c61\u56fe\uff08\u5b9e\u73b0\uff09\uff1a<\/strong> \u63cf\u7ed8\u4e86\u5fc5\u987b\u9075\u5faa\u5176\u5bf9\u5e94\u7c7b\u6240\u8bbe\u5b9a\u89c4\u5219\u7684\u5177\u4f53\u5bf9\u8c61\uff0c\u5c55\u793a\u4e86\u5b9e\u9645\u7684\u5c5e\u6027\u503c\u4ee5\u53ca\u5728\u7279\u5b9a\u6267\u884c\u65f6\u523b\u5f62\u6210\u7684\u7279\u5b9a\u94fe\u63a5\uff08\u5173\u8054\u7684\u5b9e\u4f8b\uff09\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u5bf9\u8c61\u56fe\u5145\u5f53\u4e00\u79cd<strong>\u6a21\u578b\u4e00\u81f4\u6027\u9a8c\u8bc1\u5de5\u5177<\/strong>\uff0c\u7528\u4e8e\u5c06\u62bd\u8c61\u7ed3\u6784\u4e0e\u7279\u5b9a\u7684\u3001\u5177\u4f53\u7684\u573a\u666f\u8fdb\u884c\u9a8c\u8bc1\u3002<\/p>\n<h3>\u5bf9\u6bd4\u7684\u7406\u7531<\/h3>\n<p>\u9700\u8981\u5bf9\u6bd4\u8fd9\u4e24\u79cd\u7ed3\u6784\u56fe\u7684\u539f\u56e0\u5728\u4e8e\uff0c\u533a\u5206\u62bd\u8c61\u6a21\u578b\u5b9a\u4e49\u4e0e\u5177\u4f53\u5b9e\u4f8b\u72b6\u6001\u672c\u8eab\u5b58\u5728\u56fa\u6709\u7684\u6311\u6218\uff1a<\/p>\n<ol>\n<li><strong>\u7b26\u53f7\u8bed\u4e49\u7684\u6a21\u7cca\u6027\uff1a<\/strong> \u4e24\u79cd\u56fe\u90fd\u4f7f\u7528\u7c7b\u4f3c\u7684\u56fe\u5f62\u5143\u7d20\uff08\u77e9\u5f62\u548c\u7ebf\u6761\uff09\uff0c\u9020\u6210\u4e86\u8868\u9762\u7684\u89c6\u89c9\u76f8\u4f3c\u6027\uff0c\u8fd9\u53ef\u80fd\u4f1a\u63a9\u76d6\u5b83\u4eec\u5728\u8bed\u4e49\u76ee\u7684\u4e0a\u7684\u6839\u672c\u5dee\u5f02\uff08\u7c7b\u578b\u5b9a\u4e49\u4e0e\u5b9e\u4f8b\u6570\u636e\uff09\u3002<\/li>\n<li><strong>\u8303\u56f4\u8bef\u7528\uff1a<\/strong> \u5efa\u6a21\u8005\u7ecf\u5e38\u6df7\u6dc6\u76ee\u7684<strong>\u7cfb\u7edf\u5b9a\u4e49<\/strong> (<a href=\"https:\/\/chat.visual-paradigm.com\/diagram\/uml-class-diagram\/\">\u7c7b\u56fe<\/a>) \u4e0e<strong>\u8bbe\u8ba1\u9a8c\u8bc1<\/strong> (<a href=\"https:\/\/chat.visual-paradigm.com\/diagram\/uml-object-diagram\/\">\u5bf9\u8c61\u56fe<\/a>)\uff0c\u5bfc\u81f4\u6548\u7387\u4f4e\u4e0b\u6216\u4e0d\u6b63\u786e\u7684\u6587\u6863\u9009\u62e9\u3002<\/li>\n<li><strong>\u590d\u6742\u8bbe\u8ba1\u9a8c\u8bc1\uff1a<\/strong> \u8be5\u6bd4\u8f83\u7a81\u51fa\u4e86\u5bf9\u8c61\u56fe\u5728\u9a8c\u8bc1\u7c7b\u56fe\u590d\u6742\u6027\u65b9\u9762\u7684\u4e13\u95e8\u4f5c\u7528\uff0c\u7279\u522b\u662f\u5728\u5c55\u793a\u8bf8\u5982\u805a\u5408\u3001\u7ec4\u5408\u548c\u591a\u91cd\u6027\u7ea6\u675f\u7b49\u590d\u6742\u5173\u7cfb\u7684\u53ef\u884c\u6027\u548c\u5f71\u54cd\u65b9\u9762\u3002<\/li>\n<\/ol>\n<h2>1. \u7c7b\u56fe\uff1a\u62bd\u8c61\u84dd\u56fe<\/h2>\n<p>\u7c7b\u56fe\u662fUML\u4e2d\u6700\u91cd\u8981\u7684\u7ed3\u6784\u56fe\u3002\u5b83\u4ee3\u8868\u4e86<strong>\u5b9a\u4e49<\/strong>\u7cfb\u7edf\u2014\u2014\u7c7b\u3001\u5b83\u4eec\u7684\u5c5e\u6027\u3001\u65b9\u6cd5\u4ee5\u53ca\u5b83\u4eec\u4e4b\u95f4\u7684\u9759\u6001\u5173\u7cfb\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\u5185\u5bb9\uff1a<\/h3>\n<ul>\n<li><strong>\u7c7b\uff1a<\/strong> \u62bd\u8c61\u7c7b\u578b\uff0c\u5c55\u793a\u5176\u5c5e\u6027\uff08\u6570\u636e\uff09\u548c\u64cd\u4f5c\uff08\u65b9\u6cd5\uff09\u3002<\/li>\n<li><strong>\u5173\u7cfb\uff1a<\/strong> \u5b9a\u4e49\u4e86<em>\u6f5c\u5728<\/em> \u7684\u8fde\u63a5\uff0c\u4f8b\u5982<strong>\u5173\u8054<\/strong>\uff08\u4e00\u822c\u8fde\u63a5\uff09\uff0c<strong>\u6cdb\u5316<\/strong>\uff08\u7ee7\u627f\uff09\uff0c<strong>\u805a\u5408<\/strong>\uff08\u62e5\u6709\u5173\u7cfb\uff09\uff0c\u4ee5\u53ca<strong>\u7ec4\u5408<\/strong>\uff08\u5f3a\u62e5\u6709\u5173\u7cfb\uff09\u3002<\/li>\n<li><strong>\u591a\u91cd\u6027\uff1a<\/strong> \u6307\u5b9a\u4e00\u4e2a\u7c7b\u7684\u5b9e\u4f8b\u53ef\u4ee5\u4e0e\u53e6\u4e00\u4e2a\u7c7b\u7684\u591a\u5c11\u4e2a\u5b9e\u4f8b\u76f8\u5173\u8054\uff08\u4f8b\u5982\uff0c$1..*$ \u8868\u793a\u4e00\u5bf9\u591a\uff09\u3002<\/li>\n<\/ul>\n<h3>\u4f55\u65f6\u4f7f\u7528\u7c7b\u56fe\uff1a<\/h3>\n<p>\u7c7b\u56fe\u5728\u8bbe\u8ba1\u548c\u5b9e\u73b0\u9636\u6bb5\u7528\u4e8e\uff1a<\/p>\n<ul>\n<li><strong>\u5b9a\u4e49\u7cfb\u7edf\u7ed3\u6784\uff1a<\/strong> \u5efa\u7acb\u7cfb\u7edf\u7684\u672f\u8bed\u4f53\u7cfb\uff08\u5373\u7c7b\uff09\u3002<\/li>\n<li><strong>\u89c4\u5212\u5b9e\u73b0\uff1a<\/strong> \u4f5c\u4e3a\u7f16\u5199\u9762\u5411\u5bf9\u8c61\u8bed\u8a00\u4ee3\u7801\uff08\u5982 Java\u3001C++\u3001Python \u7b49\uff09\u7684\u76f4\u63a5\u8f93\u5165\u3002<\/li>\n<li><strong>\u5efa\u6a21\u4e1a\u52a1\u9886\u57df\uff1a<\/strong> \u521b\u5efa\u73b0\u5b9e\u4e16\u754c\u5b9e\u4f53\u53ca\u5176\u5173\u7cfb\u7684\u6982\u5ff5\u56fe\uff08\u9886\u57df\u6a21\u578b\uff09\u3002<\/li>\n<\/ul>\n<p><strong> \u7c7b\u6bd4\uff1a<\/strong> \u7c7b\u56fe\u5c31\u50cf\u623f\u5c4b\u7684\u5efa\u7b51\u84dd\u56fe\u3002\u5b83\u5b9a\u4e49\u4e86\u623f\u95f4\u7684\u6570\u91cf\u3001\u5c3a\u5bf8\u548c\u6750\u6599\uff0c\u4f46\u623f\u5c4b\u672c\u8eab\u5c1a\u672a\u5efa\u9020\u3002<\/p>\n<h2>2. \u5bf9\u8c61\u56fe\uff1a\u5177\u4f53\u7684\u5feb\u7167<\/h2>\n<p>\u5bf9\u8c61\u56fe\u662f\u7c7b\u56fe\u7684\u4e00\u79cd\u7279\u6b8a\u60c5\u51b5\u3002\u5b83\u5173\u6ce8\u7684\u662f<strong>\u5b9e\u4f8b<\/strong>\uff08\u5bf9\u8c61\uff09\u4ee5\u53ca\u7cfb\u7edf\u6267\u884c\u8fc7\u7a0b\u4e2d\u67d0\u4e00\u7279\u5b9a\u65f6\u523b\u5b83\u4eec\u4e4b\u95f4\u7684\u5177\u4f53\u8fde\u63a5\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\u5efa\u6a21\u7684\u5185\u5bb9\uff1a<\/h3>\n<ul>\n<li><strong>\u5bf9\u8c61\uff1a<\/strong>\u7c7b\u7684\u547d\u540d\u5b9e\u4f8b\uff0c\u5176\u5c5e\u6027\u5177\u6709\u5b9e\u9645\u7684\u3001\u73b0\u5b9e\u4e16\u754c\u7684<strong>\u503c<\/strong>.\n<ul>\n<li><em>\u8868\u793a\u6cd5\uff1a<\/em> \u540d\u79f0\u4e0b\u5212\u7ebf\uff0c\u5e76\u91c7\u7528\u4ee5\u4e0b\u683c\u5f0f\uff1a<code>\u5bf9\u8c61\u540d\uff1a\u7c7b\u540d<\/code>\uff08\u4f8b\u5982\uff0c<code>order123 : Order<\/code>).<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u94fe\u63a5\uff1a<\/strong>\u5173\u8054\u7684\u5177\u4f53\u5b9e\u4f8b\uff0c\u663e\u793a\u54ea\u4e2a\u7279\u5b9a\u5bf9\u8c61\u4e0e\u53e6\u4e00\u4e2a\u7279\u5b9a\u5bf9\u8c61\u76f8\u8fde\u3002<\/li>\n<li><strong>\u72b6\u6001\uff1a<\/strong> \u63cf\u8ff0\u5feb\u7167\u62cd\u6444\u65f6\u7cfb\u7edf\u7684\u5b9e\u9645\u6570\u636e\u72b6\u6001\u3002<\/li>\n<\/ul>\n<h3>\u4f55\u65f6\u4f7f\u7528\u5bf9\u8c61\u56fe\uff1a<\/h3>\n<p>\u5bf9\u8c61\u56fe\u7528\u4e8e\u6d4b\u8bd5\u3001\u9a8c\u8bc1\u548c\u5c55\u793a\u590d\u6742\u573a\u666f\uff1a<\/p>\n<ul>\n<li><strong>\u5c55\u793a\u590d\u6742\u7684\u591a\u91cd\u6027\uff1a<\/strong>\u8bc1\u660e\u591a\u5bf9\u591a\u5173\u7cfb\uff08\u5728\u7c7b\u56fe\u4e2d\u5b9a\u4e49\uff09\u53ef\u4ee5\u6b63\u786e\u5b9e\u4f8b\u5316\u3002<\/li>\n<li><strong>\u9a8c\u8bc1\u6d4b\u8bd5\u7528\u4f8b\uff1a<\/strong>\u5c55\u793a\u5173\u952e\u64cd\u4f5c\u524d\u6216\u540e\u7684\u5bf9\u8c61\u786e\u5207\u72b6\u6001\uff08\u4f8b\u5982\uff0c\u8bc1\u660e\u7ed3\u8d26\u540e\u8d2d\u7269\u8f66\u4e3a\u7a7a\uff09\u3002<\/li>\n<li><strong>\u89e3\u91ca\u8fb9\u7f18\u60c5\u51b5\uff1a<\/strong>\u901a\u8fc7\u89c6\u89c9\u65b9\u5f0f\u5c55\u793a\u5bf9\u8c61\u7684\u5f02\u5e38\u914d\u7f6e\uff08\u4f8b\u5982\uff0c\u4e00\u4e2a\u5ba2\u6237\u5bf9\u8c61\u4e3a\u7a7a\u7684\u8ba2\u5355\uff09\u3002<\/li>\n<\/ul>\n<p><strong>\u7c7b\u6bd4\uff1a<\/strong> 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