{"id":10328,"date":"2026-03-18T10:23:38","date_gmt":"2026-03-18T02:23:38","guid":{"rendered":"https:\/\/www.cybermedian.com\/cn\/%f0%9f%8e%93-uml-class-diagram-tutorial-for-beginners\/"},"modified":"2026-03-18T10:23:38","modified_gmt":"2026-03-18T02:23:38","slug":"%f0%9f%8e%93-uml-class-diagram-tutorial-for-beginners","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/cn\/%f0%9f%8e%93-uml-class-diagram-tutorial-for-beginners\/","title":{"rendered":"\ud83c\udf93 \u9762\u5411\u521d\u5b66\u8005\u7684UML\u7c7b\u56fe\u6559\u7a0b"},"content":{"rendered":"<h3>\u4f7f\u7528Visual Paradigm\u5b66\u4e60\u7edf\u4e00\u5efa\u6a21\u8bed\u8a00<\/h3>\n<blockquote>\n<p><em>\u201c\u4e00\u56fe\u80dc\u5343\u884c\u4ee3\u7801\u201d<\/em>\u2014\u2014 UML\u7c7b\u56fe\u5e2e\u52a9\u4f60\u5728\u7f16\u5199\u4efb\u4f55\u4ee3\u7801\u4e4b\u524d\uff0c\u53ef\u89c6\u5316\u3001\u8bbe\u8ba1\u5e76\u6c9f\u901a\u9762\u5411\u5bf9\u8c61\u7684\u7cfb\u7edf\u3002<\/p>\n<\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/1773800545.pngkeyeyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJyZXNvdXJjZV91c2VyX2lkIjoiOGNlODI2N2YtYThmNS00NzA5LWEwZWYtYmVlZGQxN2ZiNzBmIiwicmVzb3VyY2VfaWQiOiIxNzczODAwNTQ1IiwicmVzb3VyY2VfY2hhdF9pZCI6ImY0NzE3Mjc5LTFiZjYtNDc5Ny05ZDI1LTNhOWI5ZWEwYmI5MSJ9.png\"\/><\/p>\n<h2>\ud83d\udd39 \u4ec0\u4e48\u662fUML\uff1f<\/h2>\n<p><strong>\u7edf\u4e00\u5efa\u6a21\u8bed\u8a00\uff08UML\uff09<\/strong>\u662f\u4e00\u79cd\u6807\u51c6\u5316\u7684\u56fe\u5f62\u7b26\u53f7\uff0c\u7528\u4e8e\u53ef\u89c6\u5316\u3001\u6307\u5b9a\u3001\u6784\u5efa\u548c\u8bb0\u5f55\u9762\u5411\u5bf9\u8c61\u7684\u8f6f\u4ef6\u7cfb\u7edf\u3002<\/p>\n<p>\u4e00\u4e2a<strong>\u7c7b\u56fe<\/strong>\u662f\u4e00\u79cd<em>\u9759\u6001\u7ed3\u6784\u56fe<\/em>\u901a\u8fc7\u5c55\u793a\u4ee5\u4e0b\u5185\u5bb9\u6765\u63cf\u8ff0\u4e00\u4e2a\u7cfb\u7edf\uff1a<\/p>\n<ul>\n<li>\n<p>\u2705\u00a0<strong>\u7c7b<\/strong>\u2014\u2014 \u5bf9\u8c61\u7684\u84dd\u56fe<\/p>\n<\/li>\n<li>\n<p>\u2705\u00a0<strong>\u5c5e\u6027<\/strong>\u2014\u2014 \u7c7b\u7684\u6570\u636e\/\u5c5e\u6027<\/p>\n<\/li>\n<li>\n<p>\u2705\u00a0<strong>\u64cd\u4f5c\uff08\u65b9\u6cd5\uff09<\/strong>\u2014\u2014 \u884c\u4e3a\/\u529f\u80fd<\/p>\n<\/li>\n<li>\n<p>\u2705\u00a0<strong>\u5173\u7cfb<\/strong>\u2014\u2014 \u5bf9\u8c61\u4e4b\u95f4\u5982\u4f55\u4ea4\u4e92<\/p>\n<\/li>\n<\/ul>\n<blockquote>\n<p>\ud83d\udca1\u00a0<strong>\u4e3a\u4ec0\u4e48\u8981\u5b66\u4e60UML\uff1f<\/strong>\u5b83\u5f25\u5408\u4e86\u9700\u6c42\u4e0e\u4ee3\u7801\u4e4b\u95f4\u7684\u5dee\u8ddd\uff0c\u63d0\u5347\u56e2\u961f\u6c9f\u901a\u6548\u7387\uff0c\u5e76\u6709\u52a9\u4e8e\u5c3d\u65e9\u53d1\u73b0\u8bbe\u8ba1\u7f3a\u9677\u3002<\/p>\n<\/blockquote>\n<hr\/>\n<h2>\ud83d\udd39 \u7406\u89e3\u7c7b\u4e0e\u5bf9\u8c61<\/h2>\n<h3>\u4ec0\u4e48\u662f\u7c7b\uff1f<\/h3>\n<p>\u4e00\u4e2a<strong>\u7c7b<\/strong>\u662f\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u7684\u84dd\u56fe\u3002\u5b83\u5b9a\u4e49\u4e86\uff1a<\/p>\n<ul>\n<li>\n<p><strong>\u72b6\u6001<\/strong>\uff08\u5c5e\u6027\/\u7279\u6027\uff09<\/p>\n<\/li>\n<li>\n<p><strong>\u884c\u4e3a<\/strong>\uff08\u64cd\u4f5c\/\u65b9\u6cd5\uff09<\/p>\n<\/li>\n<\/ul>\n<h3>\u4ec0\u4e48\u662f\u5bf9\u8c61\uff1f<\/h3>\n<p>\u4e00\u4e2a<strong>\u5bf9\u8c61<\/strong>\u662f\u7c7b\u7684\u4e00\u4e2a<em>\u5b9e\u4f8b<\/em>\u2014\u2014 \u7531\u7c7b\u84dd\u56fe\u6784\u5efa\u7684\u5177\u4f53\u5b9e\u4f53\u3002<\/p>\n<p><img alt=\"What is a class?\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/01-uml-base-class-and-object-explained.png\"\/><\/p>\n<h3>\ud83d\udc15 \u73b0\u5b9e\u4e16\u754c\u793a\u4f8b\uff1a\u72d7\u7c7b<\/h3>\n<pre><code>\u7c7b\uff1a\u72d7\r\n\u251c\u2500 \u5c5e\u6027\uff1a\u989c\u8272\uff0c\u540d\u5b57\uff0c\u54c1\u79cd\r\n\u2514\u2500 \u884c\u4e3a\uff1a\u6447\u5c3e\u5df4()\uff0c\u5420\u53eb()\uff0c\u8fdb\u98df()<\/code><\/pre>\n<p>\u6bcf\u4e2a<code data-backticks=\"1\">\u72d7<\/code>\u5bf9\u8c61\uff08\u4f8b\u5982\uff0c<code data-backticks=\"1\">\u6211\u7684\u5ba0\u7269<\/code>,\u00a0<code data-backticks=\"1\">\u90bb\u5c45\u7684\u72d7<\/code>\uff09\u90fd\u5177\u6709\u76f8\u540c\u7684\u7ed3\u6784\uff0c\u4f46\u4fdd\u5b58\u7740\u72ec\u7279\u7684\u6570\u636e\u3002<\/p>\n<hr\/>\n<h2>\ud83d\udd39 UML \u7c7b\u8868\u793a\u6cd5\u8be6\u89e3<\/h2>\n<p>UML \u7c7b\u8868\u793a\u4e3a\u4e00\u4e2a<strong>\u4e09\u90e8\u5206\u77e9\u5f62<\/strong>:<\/p>\n<p><img alt=\"UML Class Notation\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/02-class-notation.png\"\/><\/p>\n<h3>1\ufe0f\u20e3 \u7c7b\u540d\uff08\u9876\u90e8\u5206\u533a\uff09<\/h3>\n<ul>\n<li>\n<p><strong>\u5fc5\u586b<\/strong>\u2014\u2014 \u552f\u4e00\u5fc5\u9700\u7684\u5143\u7d20<\/p>\n<\/li>\n<li>\n<p>\u7528<strong>\u666e\u901a\u6587\u672c<\/strong>\uff0c\u5c45\u4e2d\uff0c\u7c97\u4f53<\/p>\n<\/li>\n<li>\n<p>\u62bd\u8c61\u7c7b\u4ee5\u00a0<em>\u659c\u4f53<\/em><\/p>\n<\/li>\n<\/ul>\n<h3>2\ufe0f\u20e3 \u5c5e\u6027\uff08\u4e2d\u95f4\u5206\u533a\uff09<\/h3>\n<ul>\n<li>\n<p>\u683c\u5f0f\uff1a\u00a0<code data-backticks=\"1\">\u53ef\u89c1\u6027 \u540d\u79f0 : \u7c7b\u578b = \u9ed8\u8ba4\u503c<\/code><\/p>\n<\/li>\n<li>\n<p>\u6620\u5c04\u5230\u00a0<strong>\u6210\u5458\u53d8\u91cf<\/strong>\u00a0\u5728\u4ee3\u7801\u4e2d<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b\uff1a\u00a0<code data-backticks=\"1\">- \u5e74\u9f84 : \u6574\u6570 = 0<\/code><\/p>\n<\/li>\n<\/ul>\n<h3>3\ufe0f\u20e3 \u64cd\u4f5c\/\u65b9\u6cd5\uff08\u5e95\u90e8\u5206\u533a\uff09<\/h3>\n<ul>\n<li>\n<p>\u683c\u5f0f\uff1a\u00a0<code data-backticks=\"1\">\u53ef\u89c1\u6027 \u65b9\u6cd5\u540d(\u53c2\u6570 : \u7c7b\u578b) : \u8fd4\u56de\u7c7b\u578b<\/code><\/p>\n<\/li>\n<li>\n<p>\u6620\u5c04\u5230\u00a0<strong>\u7c7b\u65b9\u6cd5<\/strong>\u00a0\u5728\u4ee3\u7801\u4e2d<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b\uff1a\u00a0<code data-backticks=\"1\">+ \u8ba1\u7b97\u603b\u8ba1() : \u53cc\u7cbe\u5ea6<\/code><\/p>\n<\/li>\n<\/ul>\n<p><img alt=\"Class Operations\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/03-class-notation-with-examples.png\"\/><\/p>\n<hr\/>\n<h2>\ud83d\udd39 \u7c7b\u53ef\u89c1\u6027\u4e0e\u53c2\u6570<\/h2>\n<h3>\ud83d\udd10 \u53ef\u89c1\u6027\u4fee\u9970\u7b26<\/h3>\n<p>\u524d\u7f00\u7b26\u53f7\u8868\u793a\u8bbf\u95ee\u7ea7\u522b\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7b26\u53f7<\/th>\n<th>\u53ef\u89c1\u6027<\/th>\n<th>\u53ef\u8bbf\u95ee\u6765\u6e90<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code data-backticks=\"1\">+<\/code><\/td>\n<td>\u516c\u5171<\/td>\n<td>\u4efb\u4f55\u5730\u65b9<\/td>\n<\/tr>\n<tr>\n<td><code data-backticks=\"1\">-<\/code><\/td>\n<td>\u79c1\u6709<\/td>\n<td>\u4ec5\u5728\u7c7b\u5185<\/td>\n<\/tr>\n<tr>\n<td><code data-backticks=\"1\">#<\/code><\/td>\n<td>\u53d7\u4fdd\u62a4\u7684<\/td>\n<td>\u5728\u7c7b\u53ca\u5b50\u7c7b\u4e2d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img alt=\"Class Visibility\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/04-class-attributes-with-different-visibility.png\"\/><\/p>\n<h3>\u27a1\ufe0f \u53c2\u6570\u65b9\u5411\u6027<\/h3>\n<p>\u6307\u5b9a\u65b9\u6cd5\u53c2\u6570\u4e2d\u7684\u6570\u636e\u6d41\u5411\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u65b9\u5411<\/th>\n<th>\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code data-backticks=\"1\">in<\/code><\/td>\n<td>\u4ec5\u8f93\u5165\uff08\u9ed8\u8ba4\uff09<\/td>\n<\/tr>\n<tr>\n<td><code data-backticks=\"1\">out<\/code><\/td>\n<td>\u4ec5\u8f93\u51fa<\/td>\n<\/tr>\n<tr>\n<td><code data-backticks=\"1\">inout<\/code><\/td>\n<td>\u8f93\u5165\u548c\u8f93\u51fa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img alt=\"Parameter Directionality\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/05-parameter-directionality.png\"\/><\/p>\n<blockquote>\n<p>\ud83d\udca1 \u63d0\u793a\uff1a\u5927\u591a\u6570\u7f16\u7a0b\u8bed\u8a00\u9ed8\u8ba4\u4f7f\u7528\u00a0<code data-backticks=\"1\">in<\/code>\u00a0\u53c2\u6570\u3002\u5728\u5efa\u6a21API\u6216\u590d\u6742\u6570\u636e\u6d41\u65f6\uff0c\u8bf7\u4f7f\u7528\u65b9\u5411\u6027\u3002<\/p>\n<\/blockquote>\n<hr\/>\n<h2>\ud83d\udd39 \u7c7b\u56fe\u7684\u4e09\u4e2a\u89c6\u89d2<\/h2>\n<p>\u6839\u636e\u60a8\u7684\u5f00\u53d1\u9636\u6bb5\u9009\u62e9\u56fe\u8868\u7684\u8be6\u7ec6\u7a0b\u5ea6\uff1a<\/p>\n<p><img alt=\"Perspectives of Class Diagram\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/06-perspective-of-class-diagram.png\"\/><\/p>\n<table>\n<thead>\n<tr>\n<th>\u89c6\u89d2<\/th>\n<th>\u4f55\u65f6\u4f7f\u7528<\/th>\n<th>\u91cd\u70b9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u6982\u5ff5\u6027<\/strong><\/td>\n<td>\u65e9\u671f\u5206\u6790\u3001\u9886\u57df\u5efa\u6a21<\/td>\n<td>\u4e1a\u52a1\u6982\u5ff5\u3001\u73b0\u5b9e\u4e16\u754c\u4e2d\u7684\u5b9e\u4f53<\/td>\n<\/tr>\n<tr>\n<td><strong>\u89c4\u8303\u6027<\/strong><\/td>\n<td>\u8bbe\u8ba1\u9636\u6bb5\u3001\u63a5\u53e3\u5b9a\u4e49<\/td>\n<td>\u62bd\u8c61\u6570\u636e\u7c7b\u578b\uff08ADTs\uff09\u3001\u65b9\u6cd5\u7b7e\u540d<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5b9e\u73b0\u6027<\/strong><\/td>\n<td>\u7f16\u7801\u9636\u6bb5\u3001\u6280\u672f\u8bbe\u8ba1<\/td>\n<td>\u5177\u4f53\u7c7b\uff0c\u8bed\u8a00\u7279\u5b9a\u7684\u7ec6\u8282<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote>\n<p>\ud83c\udfaf\u00a0<strong>\u6700\u4f73\u5b9e\u8df5<\/strong>: \u4ece\u6982\u5ff5\u5f00\u59cb \u2192 \u9010\u6b65\u6f14\u8fdb\u5230\u5b9e\u73b0\u3002\u4e0d\u8981\u5728\u65e9\u671f\u7684\u56fe\u4e2d\u585e\u5165\u8fc7\u591a\u6280\u672f\u7ec6\u8282\u3002<\/p>\n<\/blockquote>\n<hr\/>\n<h2>\ud83d\udd39 \u7c7b\u4e4b\u95f4\u7684\u5173\u7cfb<\/h2>\n<p>UML \u7cbe\u786e\u5730\u5b9a\u4e49\u4e86\u7c7b\u4e4b\u95f4\u7684\u4ea4\u4e92\u65b9\u5f0f\u3002\u638c\u63e1\u8fd96\u79cd\u6838\u5fc3\u5173\u7cfb\uff1a<\/p>\n<p><img alt=\"Relationships between classes\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/07-relationships-between-classes.png\"\/><\/p>\n<h3>1\ufe0f\u20e3 \u7ee7\u627f\uff08\u6cdb\u5316\uff09\u2192 \u201c\u662f\u2014\u4e00\u79cd\u201d<\/h3>\n<ul>\n<li>\n<p>\u8868\u793a\u7279\u5316\uff1a<code data-backticks=\"1\">\u5b50\u7c7b<\/code>\u00a0<strong>\u662f<\/strong>\u00a0<code data-backticks=\"1\">\u7236\u7c7b<\/code><\/p>\n<\/li>\n<li>\n<p>\u7b26\u53f7\u8868\u793a\uff1a\u5e26\u00a0<strong>\u7a7a\u5fc3\u4e09\u89d2\u5f62\u7bad\u5934<\/strong>\u00a0\u6307\u5411\u7236\u7c7b<\/p>\n<\/li>\n<li>\n<p>\u62bd\u8c61\u7c7b\u4ee5\u00a0<em>\u659c\u4f53<\/em><\/p>\n<\/li>\n<\/ul>\n<p><img alt=\"Inheritance (or Generalization)\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/08-inheritance-in-class-diagram.png\"\/><\/p>\n<h4>\ud83d\udcd0 \u793a\u4f8b\uff1a\u5f62\u72b6\u5c42\u6b21\u7ed3\u6784<\/h4>\n<p><img alt=\"Inheritance Example - Shapes\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/09-inheritance-hierarchy-example.png\"\/><\/p>\n<pre class=\"lang-java\"><code data-language=\"java\">\/\/ \u4ee3\u7801\u7b49\u4ef7\u5f62\u5f0f\r\n\u62bd\u8c61\u7c7b Shape { ... }\r\nclass Circle \u7ee7\u627f\u81ea Shape { ... }\r\nclass Rectangle \u7ee7\u627f\u81ea Shape { ... }\r\n<\/code><\/pre>\n<h3>2\ufe0f\u20e3 \u5173\u8054 \u2192 \u201c\u4f7f\u7528\u2014\u4e00\u79cd\u201d\uff08\u7ed3\u6784\u94fe\u63a5\uff09<\/h3>\n<ul>\n<li>\n<p>\u8868\u793a\u540c\u7ea7\u7c7b\u4e4b\u95f4\u7684\u6301\u4e45\u5173\u7cfb<\/p>\n<\/li>\n<li>\n<p>\u7b26\u53f7\u8868\u793a\uff1a\u00a0<strong>\u5b9e\u7ebf<\/strong>\u00a0\u7c7b\u4e4b\u95f4<\/p>\n<\/li>\n<li>\n<p>\u901a\u5e38\u7528\u52a8\u8bcd\u77ed\u8bed\u6807\u6ce8\uff1a\u00a0<code data-backticks=\"1\">\u653e\u7f6e<\/code>,\u00a0<code data-backticks=\"1\">\u7ba1\u7406<\/code>,\u00a0<code data-backticks=\"1\">\u5305\u542b<\/code><\/p>\n<\/li>\n<\/ul>\n<h4>\u7b80\u5355\u5173\u8054\u793a\u4f8b\uff1a<\/h4>\n<p><img alt=\"Simple Association\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/10-simple-association-example.png\"\/><\/p>\n<h4>\ud83d\udd22 \u57fa\u6570\uff08\u591a\u91cd\u6027\uff09<\/h4>\n<p>\u5b9a\u4e49\u6709\u591a\u5c11\u4e2a\u5b9e\u4f8b\u53c2\u4e0e\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7b26\u53f7\u8868\u793a<\/th>\n<th>\u542b\u4e49<\/th>\n<th>\u793a\u4f8b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code data-backticks=\"1\">1<\/code><\/td>\n<td>\u6070\u597d\u4e00\u4e2a<\/td>\n<td>\u4e00\u4e2a\u5ba2\u6237\u4e0b\u4e00\u7b14\u8ba2\u5355<\/td>\n<\/tr>\n<tr>\n<td><code data-backticks=\"1\">0..1<\/code><\/td>\n<td>\u96f6\u4e2a\u6216\u4e00\u4e2a<\/td>\n<td>\u4e00\u4e2a\u7528\u6237\u53ef\u80fd\u6709\u4e00\u4e2a\u4e2a\u4eba\u8d44\u6599<\/td>\n<\/tr>\n<tr>\n<td><code data-backticks=\"1\">*<\/code>\u6216<code data-backticks=\"1\">0..*<\/code><\/td>\n<td>\u96f6\u4e2a\u6216\u591a\u4e2a<\/td>\n<td>\u4e00\u4e2a\u90e8\u95e8\u6709\u591a\u4e2a\u5458\u5de5<\/td>\n<\/tr>\n<tr>\n<td><code data-backticks=\"1\">1..*<\/code><\/td>\n<td>\u4e00\u4e2a\u6216\u591a\u4e2a<\/td>\n<td>\u4e00\u4e2a\u8ba2\u5355\u81f3\u5c11\u5305\u542b\u4e00\u4e2a\u5546\u54c1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img alt=\"Cardinality\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/11-associations-with-different-multiplicies.png\"\/><\/p>\n<h3>3\ufe0f\u20e3 \u805a\u5408 \u2192 \u201c\u62e5\u6709\u201d\uff08\u5f31\u62e5\u6709\u5173\u7cfb\uff09<\/h3>\n<ul>\n<li>\n<p>\u7279\u6b8a\u5173\u8054\uff1a\u201c\u90e8\u5206-\u6574\u4f53\u201d\u5173\u7cfb<\/p>\n<\/li>\n<li>\n<p>\u90e8\u5206\u53ef\u4ee5\u72ec\u7acb\u5b58\u5728<strong>\u72ec\u7acb\u4e8e\u6574\u4f53<\/strong>\u6574\u4f53\u4e4b\u5916<\/p>\n<\/li>\n<li>\n<p>\u7b26\u53f7\u8868\u793a\uff1a\u5b9e\u7ebf\u642d\u914d<strong>\u7a7a\u5fc3\u83f1\u5f62<\/strong>\u4f4d\u4e8e\u201c\u6574\u4f53\u201d\u4e00\u7aef<\/p>\n<\/li>\n<\/ul>\n<p><img alt=\"Aggregation\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/12-aggregation.png\"\/><\/p>\n<pre class=\"lang-java\"><code data-language=\"java\">\/\/ \u793a\u4f8b\uff1a\u90e8\u95e8\u805a\u5408\u6559\u6388\r\nclass Department {\r\n    private List&lt;Professor&gt; professors; \/\/ \u5373\u4f7f\u90e8\u95e8\u89e3\u6563\uff0c\u6559\u6388\u4f9d\u7136\u5b58\u5728\r\n}<\/code><\/pre>\n<h3>4\ufe0f\u20e3 \u7ec4\u5408 \u2192 \u201c\u5f3a\u62e5\u6709\u201d\uff08\u5f3a\u62e5\u6709\u5173\u7cfb\uff09<\/h3>\n<ul>\n<li>\n<p>\u805a\u5408\u7684\u66f4\u5f3a\u5f62\u5f0f<\/p>\n<\/li>\n<li>\n<p>\u96f6\u4ef6<strong>\u65e0\u6cd5\u72ec\u7acb\u5b58\u5728<\/strong>\u6ca1\u6709\u6574\u4f53\u5c31\u65e0\u6cd5\u5b58\u5728\uff1b\u751f\u547d\u5468\u671f\u76f8\u4e92\u5173\u8054<\/p>\n<\/li>\n<li>\n<p>\u7b26\u53f7\uff1a\u5b9e\u7ebf\u642d\u914d<strong>\u5b9e\u5fc3\u83f1\u5f62<\/strong>\u4f4d\u4e8e\u201c\u6574\u4f53\u201d\u4e00\u7aef<\/p>\n<\/li>\n<\/ul>\n<p><img alt=\"Composition\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/13-composition.png\"\/><\/p>\n<pre class=\"lang-java\"><code data-language=\"java\">\/\/ \u793a\u4f8b\uff1a\u623f\u5c4b\u5305\u542b\u623f\u95f4\r\nclass House {\r\n    private List&lt;Room&gt; rooms; \/\/ \u623f\u95f4\u5728\u623f\u5c4b\u88ab\u62c6\u9664\u65f6\u4e00\u540c\u9500\u6bc1\r\n}\r\n<\/code><\/pre>\n<blockquote>\n<p>\u26a0\ufe0f\u00a0<strong>\u5173\u952e\u533a\u522b<\/strong>:<\/p>\n<ul>\n<li>\n<p>\u805a\u5408\uff1a<code data-backticks=\"1\">\u6c7d\u8f66<\/code>\u62e5\u6709<code data-backticks=\"1\">\u8f66\u8f6e<\/code>\u2192 \u8f66\u8f6e\u53ef\u4ee5\u88ab\u91cd\u590d\u4f7f\u7528<\/p>\n<\/li>\n<li>\n<p>\u7ec4\u5408\uff1a<code data-backticks=\"1\">\u623f\u5c4b<\/code>\u62e5\u6709<code data-backticks=\"1\">\u623f\u95f4<\/code>\u2192 \u623f\u95f4\u65e0\u6cd5\u8131\u79bb\u623f\u5c4b\u800c\u5b58\u5728<\/p>\n<\/li>\n<\/ul>\n<\/blockquote>\n<h3>5\ufe0f\u20e3 \u4f9d\u8d56 \u2192 \u201c\u4e34\u65f6\u4f7f\u7528\u201d<\/h3>\n<ul>\n<li>\n<p>\u4e00\u4e2a\u7c7b<strong>\u4f9d\u8d56\u4e8e<\/strong>\u53e6\u4e00\u4e2a\u7c7b\u4ee5\u5b9e\u73b0\u76ee\u7684\uff08\u4f8b\u5982\uff0c\u65b9\u6cd5\u53c2\u6570\uff09<\/p>\n<\/li>\n<li>\n<p>\u975e\u7ed3\u6784\u6027\u5173\u7cfb\uff1b\u4f9b\u5e94\u65b9\u7684\u53d8\u66f4\u53ef\u80fd\u5f71\u54cd\u5ba2\u6237\u7aef<\/p>\n<\/li>\n<li>\n<p>\u7b26\u53f7\uff1a<strong>\u865a\u7ebf\u642d\u914d\u5f00\u53e3\u7bad\u5934<\/strong><\/p>\n<\/li>\n<\/ul>\n<p><img alt=\"Dependency\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/14-dependency.png\"\/><\/p>\n<h4>\u5b9e\u9645\u793a\u4f8b\uff1a\u4eba\u9605\u8bfb\u4e66\u672c<\/h4>\n<p><img alt=\"Dependency\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/15-dependency-example.png\"\/><\/p>\n<pre class=\"lang-java\"><code data-language=\"java\">class Person {\r\n    boolean hasRead(Book book) { ... } \/\/ \u4e66\u672c\u662f\u53c2\u6570 \u2192 \u4f9d\u8d56\u5173\u7cfb\r\n}\r\n<\/code><\/pre>\n<h3>6\ufe0f\u20e3 \u5b9e\u73b0 \u2192 \u201c\u5b9e\u73b0\u201d<\/h3>\n<ul>\n<li>\n<p>\u2026\u2026\u4e4b\u95f4\u7684\u5173\u7cfb<strong>\u63a5\u53e3<\/strong>\u53ca\u5176\u5b9e\u73b0\u7c7b<\/p>\n<\/li>\n<li>\n<p>\u7b26\u53f7\u8868\u793a\uff1a<strong>\u5e26\u7a7a\u5fc3\u4e09\u89d2\u7bad\u5934\u7684\u865a\u7ebf<\/strong><\/p>\n<\/li>\n<\/ul>\n<p><img alt=\"Realization\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/16-realization.png\"\/><\/p>\n<pre class=\"lang-java\"><code data-language=\"java\">\/\/ Java \u793a\u4f8b\r\ninterface Owner {\r\n    void acquireProperty();\r\n    void disposeProperty();\r\n}\r\nclass Person implements Owner { ... }\r\nclass Corporation implements Owner { ... }\r\n<\/code><\/pre>\n<hr\/>\n<h2>\ud83d\udd39 \u73b0\u5b9e\u4e16\u754c\u4e2d\u7684\u793a\u4f8b<\/h2>\n<h3>\ud83d\uded2 \u793a\u4f8b 1\uff1a\u8ba2\u5355\u7ba1\u7406\u7cfb\u7edf<\/h3>\n<p><img alt=\"Class Diagram Example: Order System\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/17-class-diagram-example-order-system.png\"\/><\/p>\n<p><strong>\u5173\u952e\u8981\u70b9<\/strong>:<\/p>\n<ul>\n<li>\n<p><code data-backticks=\"1\">\u5ba2\u6237<\/code>\u00a0<em>\u4e0b\u5355<\/em>\u00a0<code data-backticks=\"1\">\u8ba2\u5355<\/code>\u00a0\uff08\u5173\u8054\uff0c1..*\uff09<\/p>\n<\/li>\n<li>\n<p><code data-backticks=\"1\">\u8ba2\u5355<\/code>\u00a0<em>\u7531\u2026\u2026\u7ec4\u6210<\/em>\u00a0<code data-backticks=\"1\">\u8ba2\u5355\u9879<\/code>\u00a0\uff08\u7ec4\u5408\uff09<\/p>\n<\/li>\n<li>\n<p><code data-backticks=\"1\">\u8ba2\u5355\u9879<\/code>\u00a0<em>\u5f15\u7528<\/em>\u00a0<code data-backticks=\"1\">\u4ea7\u54c1<\/code>\u00a0\uff08\u5173\u8054\uff09<\/p>\n<\/li>\n<li>\n<p><code data-backticks=\"1\">\u652f\u4ed8<\/code>\u00a0<em>\u5b9e\u73b0<\/em>\u00a0<code data-backticks=\"1\">IPayment<\/code>\u00a0\u63a5\u53e3\uff08\u5b9e\u73b0\uff09<\/p>\n<\/li>\n<\/ul>\n<h3>\ud83d\udcbb \u793a\u4f8b 2\uff1a\u5e26\u6ce8\u91ca\u7684 GUI \u5e94\u7528\u7a0b\u5e8f<\/h3>\n<p><img alt=\"Class Diagram Example: GUI\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2026\/03\/18-uml-class-diagram-example-gui.png\"\/><\/p>\n<p><strong>\u5173\u952e\u8981\u70b9<\/strong>:<\/p>\n<ul>\n<li>\n<p>\u6ce8\u91ca\uff08\u9ec4\u8272\u6846\uff09\u5728\u4e0d\u4f7f\u7c7b\u6df7\u4e71\u7684\u60c5\u51b5\u4e0b\u589e\u52a0\u8bf4\u660e<\/p>\n<\/li>\n<li>\n<p><code data-backticks=\"1\">JFrame<\/code>\u00a0<em>\u5305\u542b<\/em>\u00a0<code data-backticks=\"1\">JPanel<\/code>\u00a0(\u7ec4\u5408)<\/p>\n<\/li>\n<li>\n<p>\u4e8b\u4ef6\u76d1\u542c\u5668\u4f7f\u7528\u4f9d\u8d56\u5173\u7cfb<\/p>\n<\/li>\n<\/ul>\n<hr\/>\n<h2>\ud83d\udd39 \u63a8\u8350\u7684UML\u5de5\u5177<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u5de5\u5177<\/th>\n<th>\u6700\u9002\u5408<\/th>\n<th>\u4ef7\u683c<\/th>\n<th>\u5e73\u53f0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\ud83e\udd47\u00a0<strong>Visual Paradigm \u793e\u533a\u7248<\/strong><\/td>\n<td>\u521d\u5b66\u8005\u3001\u5b66\u751f\u3001\u5b8c\u6574\u7684UML\u652f\u6301<\/td>\n<td>\u2705\u00a0<strong>\u514d\u8d39<\/strong><\/td>\n<td>Windows\/macOS\/Linux<\/td>\n<\/tr>\n<tr>\n<td>Lucidchart<\/td>\n<td>\u534f\u4f5c\u3001\u57fa\u4e8e\u7f51\u7edc<\/td>\n<td>\u514d\u8d39\u589e\u503c<\/td>\n<td>\u7f51\u9875<\/td>\n<\/tr>\n<tr>\n<td>draw.io (diagrams.net)<\/td>\n<td>\u5feb\u901f\u7ed8\u56fe\uff0c\u7b80\u6d01<\/td>\n<td>\u2705 \u514d\u8d39<\/td>\n<td>\u7f51\u9875\/\u684c\u9762<\/td>\n<\/tr>\n<tr>\n<td>StarUML<\/td>\n<td>\u8f7b\u91cf\u7ea7\uff0c\u53ef\u6269\u5c55<\/td>\n<td>\u4ed8\u8d39\uff08\u514d\u8d39\u8bd5\u7528\uff09<\/td>\n<td>Windows\/macOS\/Linux<\/td>\n<\/tr>\n<tr>\n<td>Enterprise Architect<\/td>\n<td>\u5927\u578b\u56e2\u961f\uff0c\u590d\u6742\u7cfb\u7edf<\/td>\n<td>\u4ed8\u8d39<\/td>\n<td>\u8d62<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\ud83c\udfc6 \u4e3a\u4ec0\u4e48\u9009\u62e9 Visual Paradigm \u793e\u533a\u7248\uff1f<\/h3>\n<p>\u2705\u00a0<strong>100% \u514d\u8d39<\/strong>\u7528\u4e8e\u5b66\u4e60\u548c\u975e\u5546\u4e1a\u7528\u9014<br \/>\n\u2705\u00a0<strong>\u6240\u6709 UML 2.x \u56fe\u8868\u7c7b\u578b<\/strong>\u5747\u652f\u6301\uff08\u7c7b\u56fe\u3001\u7528\u4f8b\u56fe\u3001\u5e8f\u5217\u56fe\u7b49\uff09<br \/>\n\u2705\u00a0<strong>\u76f4\u89c2\u7684\u62d6\u653e\u754c\u9762<\/strong>\u65e0\u9700\u7f16\u7801<br \/>\n\u2705\u00a0<strong>\u4ee3\u7801\u5de5\u7a0b<\/strong>\uff1a\u4ece\u56fe\u8868\u751f\u6210\u4ee3\u7801\u5e76\u53cd\u5411\u5de5\u7a0b<br \/>\n\u2705\u00a0<strong>\u8de8\u5e73\u53f0<\/strong>\uff1aWindows\u3001macOS\u3001Linux<br \/>\n\u2705\u00a0<strong>\u83b7\u5956\u4ea7\u54c1<\/strong>\uff1a\u5168\u7403\u9ad8\u6821\u548c\u4e13\u4e1a\u4eba\u58eb\u7684\u4fe1\u8d56\u4e4b\u9009<\/p>\n<p>\ud83d\udd17\u00a0<a href=\"https:\/\/www.visual-paradigm.com\/download\/community.jsp\">\u514d\u8d39\u4e0b\u8f7d Visual Paradigm \u793e\u533a\u7248<\/a><\/p>\n<hr\/>\n<h2>\ud83d\udd39 \u5feb\u901f\u5165\u95e8 Visual Paradigm\uff1a5\u5206\u949f\u8bbe\u7f6e<\/h2>\n<ol>\n<li>\n<p><strong>\u4e0b\u8f7d\u5e76\u5b89\u88c5<\/strong><br \/>\n\u2192 \u8bbf\u95ee<a href=\"https:\/\/www.visual-paradigm.com\/download\/community.jsp\">visual-paradigm.com\/download\/community.jsp<\/a><br \/>\n\u2192 \u9009\u62e9\u60a8\u7684\u64cd\u4f5c\u7cfb\u7edf \u2192 \u5b89\u88c5\uff08\u8017\u65f6\u5c0f\u4e8e2\u5206\u949f\uff09<\/p>\n<\/li>\n<li>\n<p><strong>\u521b\u5efa\u65b0\u9879\u76ee<\/strong><br \/>\n\u2192 \u542f\u52a8 VP \u2192<code data-backticks=\"1\">\u9879\u76ee<\/code>\u00a0\u2192\u00a0<code data-backticks=\"1\">\u65b0\u5efa<\/code>\u00a0\u2192 \u9009\u62e9\u201c\u7c7b\u56fe\u201d<\/p>\n<\/li>\n<li>\n<p><strong>\u6dfb\u52a0\u60a8\u7684\u7b2c\u4e00\u4e2a\u7c7b<\/strong><br \/>\n\u2192 \u4ece\u5de5\u5177\u7bb1\u4e2d\u62d6\u62fd\u201c\u7c7b\u201d \u2192 \u53cc\u51fb\u7f16\u8f91\u540d\u79f0<br \/>\n\u2192 \u53f3\u952e\u5355\u51fb\u7c7b \u2192\u00a0<code data-backticks=\"1\">\u6dfb\u52a0<\/code>\u00a0\u2192\u00a0<code data-backticks=\"1\">\u5c5e\u6027<\/code>\u00a0\/\u00a0<code data-backticks=\"1\">\u64cd\u4f5c<\/code><\/p>\n<\/li>\n<li>\n<p><strong>\u7ed8\u5236\u5173\u7cfb<\/strong><br \/>\n\u2192 \u4f7f\u7528\u5de5\u5177\u680f\u4e2d\u7684\u5173\u7cfb\u5de5\u5177\uff08\u7ee7\u627f\u3001\u5173\u8054\u7b49\uff09<br \/>\n\u2192 \u5355\u51fb\u6e90\u7c7b \u2192 \u62d6\u62fd\u5230\u76ee\u6807\u7c7b<\/p>\n<\/li>\n<li>\n<p><strong>\u5bfc\u51fa\u4e0e\u5206\u4eab<\/strong><br \/>\n\u2192\u00a0<code data-backticks=\"1\">\u56fe<\/code>\u00a0\u2192\u00a0<code data-backticks=\"1\">\u5bfc\u51fa<\/code>\u00a0\u2192 PNG\/PDF\/SVG<br \/>\n\u2192 \u6216\u751f\u6210 Java\/C# \u4ee3\u7801\uff1a\u00a0<code data-backticks=\"1\">\u5de5\u5177<\/code>\u00a0\u2192\u00a0<code data-backticks=\"1\">\u4ee3\u7801\u5de5\u7a0b<\/code><\/p>\n<\/li>\n<\/ol>\n<p>\ud83c\udfac\u00a0<strong>\u4e13\u4e1a\u63d0\u793a<\/strong>: \u4f7f\u7528\u00a0<code data-backticks=\"1\">\u6a21\u578b<\/code>\u00a0\u2192\u00a0<code data-backticks=\"1\">\u6a21\u578b\u62a5\u544a<\/code>\u81ea\u52a8\u751f\u6210\u60a8\u7684\u56fe\u8868\u6587\u6863\uff01<\/p>\n<hr\/>\n<h2>\ud83c\udfaf \u5feb\u901f\u53c2\u8003\u901f\u67e5\u8868<\/h2>\n<h3>\u7c7b\u56fe\u8bed\u6cd5\u6982\u8981<\/h3>\n<pre><code>+---------------------+\r\n|     \u7c7b\u540d       |  \u2190 \u4e0a\u65b9\uff1a\u540d\u79f0\uff08\u5fc5\u9700\uff09\r\n+---------------------+\r\n| - \u5c5e\u6027 : \u7c7b\u578b       |  \u2190 \u4e2d\u95f4\uff1a\u5c5e\u6027\r\n| + \u65b9\u6cd5 : \u7c7b\u578b     |\r\n+---------------------+\r\n| + \u65b9\u6cd5() : \u7c7b\u578b   |  \u2190 \u4e0b\u65b9\uff1a\u64cd\u4f5c\r\n| - calc(x: int):int  |\r\n+---------------------+\r\n<\/code><\/pre>\n<h3>\u5173\u7cfb\u7b26\u53f7\u901f\u67e5\u6307\u5357<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u5173\u7cfb<\/th>\n<th>\u7b26\u53f7<\/th>\n<th>\u5173\u952e\u8bcd<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u7ee7\u627f<\/td>\n<td>\u2500\u2500\u2500\u25b7<\/td>\n<td>\u201c\u662f-a\u201d<\/td>\n<\/tr>\n<tr>\n<td>\u5173\u8054<\/td>\n<td>\u2500\u2500\u2500<\/td>\n<td>\u201c\u6709-a\u201d\/\u201d\u4f7f\u7528\u201d<\/td>\n<\/tr>\n<tr>\n<td>\u805a\u5408<\/td>\n<td>\u2500\u2500\u2500\u25c7<\/td>\n<td>\u201c\u90e8\u5206-a\u201d\uff08\u5f31\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u7ec4\u5408<\/td>\n<td>\u2500\u2500\u2500\u25c6<\/td>\n<td>\u201c\u90e8\u5206-a\u201d\uff08\u5f3a\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u4f9d\u8d56<\/td>\n<td>\u2013 \u2013 -&gt;<\/td>\n<td>\u201c\u4e34\u65f6\u4f7f\u7528\u201d<\/td>\n<\/tr>\n<tr>\n<td>\u5b9e\u73b0<\/td>\n<td>\u2013 \u2013 \u25b7<\/td>\n<td>\u201c\u5b9e\u73b0\u201d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr\/>\n<h2>\ud83d\ude80 UML \u521d\u5b66\u8005\u7684\u4e0b\u4e00\u6b65<\/h2>\n<ol>\n<li>\n<p>\u2705\u00a0<strong>\u7ec3\u4e60<\/strong>: \u5efa\u6a21\u4e00\u4e2a\u7b80\u5355\u7cfb\u7edf\uff08\u56fe\u4e66\u9986\u3001\u94f6\u884c\u8d26\u6237\u3001\u8d2d\u7269\u8f66\uff09<\/p>\n<\/li>\n<li>\n<p>\u2705\u00a0<strong>\u9006\u5411\u5de5\u7a0b<\/strong>: \u5c06\u73b0\u6709\u7684 Java\/C# \u4ee3\u7801\u5bfc\u5165 Visual Paradigm\uff0c\u67e5\u770b\u81ea\u52a8\u751f\u6210\u7684\u56fe\u8868<\/p>\n<\/li>\n<li>\n<p>\u2705\u00a0<strong>\u534f\u4f5c<\/strong>: \u4e0e\u56e2\u961f\u6210\u5458\u5171\u4eab\u56fe\u8868\u4ee5\u8fdb\u884c\u8bbe\u8ba1\u8bc4\u5ba1<\/p>\n<\/li>\n<li>\n<p>\u2705\u00a0<strong>\u8fed\u4ee3<\/strong>: \u4ece\u6982\u5ff5\u5f00\u59cb \u2192 \u5728\u7f16\u7801\u8fc7\u7a0b\u4e2d\u9010\u6b65\u7ec6\u5316\u4e3a\u5b9e\u73b0<\/p>\n<\/li>\n<li>\n<p>\u2705\u00a0<strong>\u63a2\u7d22<\/strong>: \u63a5\u4e0b\u6765\u5b66\u4e60\u7528\u4f8b\u56fe\u3001\u987a\u5e8f\u56fe\u548c\u6d3b\u52a8\u56fe<\/p>\n<\/li>\n<\/ol>\n<blockquote>\n<p>\ud83d\udcac\u00a0<strong>\u8bb0\u4f4f<\/strong>: UML \u662f\u4e00\u79cd<em>\u6c9f\u901a\u5de5\u5177<\/em>\uff0c\u800c\u4e0d\u662f\u5b98\u50da\u4e3b\u4e49\u3002\u4fdd\u6301\u56fe\u8868\u5c3d\u53ef\u80fd\u7b80\u5355\u2014\u2014\u4f46\u4e0d\u8981\u66f4\u7b80\u5355\u3002<\/p>\n<\/blockquote>\n<hr\/>\n<p>\u2728\u00a0<strong>\u4f60\u5df2\u7ecf\u51c6\u5907\u597d\u50cf\u4e13\u4e1a\u4eba\u58eb\u4e00\u6837\u8fdb\u884c\u8bbe\u8ba1\u4e86\uff01<\/strong><br \/>\n\u4eca\u5929\u5c31\u7528\u00a0<a href=\"https:\/\/www.visual-paradigm.com\/download\/community.jsp\">Visual Paradigm \u793e\u533a\u7248<\/a>\u00a0\u2014\u2014 \u514d\u8d39\u3001\u5f3a\u5927\u4e14\u9002\u5408\u521d\u5b66\u8005\u3002<\/p>\n<p class=\"\"><em>\u6109\u5feb\u5efa\u6a21\uff01<\/em>\u00a0\ud83c\udfa8\ud83d\udd27\ud83d\ude80<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528Visual Paradigm\u5b66\u4e60\u7edf<\/p>\n","protected":false},"author":11,"featured_media":10329,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-10328","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\ud83c\udf93 \u9762\u5411\u521d\u5b66\u8005\u7684UML\u7c7b\u56fe\u6559\u7a0b - IT \u89c2\u5bdf\u8005\u968f\u7b14 - \u8d44\u8baf\u79d1\u6280\u535a\u5ba2<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cybermedian.com\/cn\/\ud83c\udf93-uml-class-diagram-tutorial-for-beginners\/\" \/>\n<meta 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