{"id":1117,"date":"2026-03-29T08:16:42","date_gmt":"2026-03-29T08:16:42","guid":{"rendered":"https:\/\/www.method-post.com\/tw\/decoding-multiplicity-class-diagrams-guide\/"},"modified":"2026-03-29T08:16:42","modified_gmt":"2026-03-29T08:16:42","slug":"decoding-multiplicity-class-diagrams-guide","status":"publish","type":"post","link":"https:\/\/www.method-post.com\/tw\/decoding-multiplicity-class-diagrams-guide\/","title":{"rendered":"\u89e3\u78bc\u591a\u91cd\u6027\uff1a\u638c\u63e1 1:N\u30011:1 \u548c N:N \u95dc\u4fc2\u7684\u7c21\u55ae\u6307\u5357"},"content":{"rendered":"<p>\u5728\u8edf\u9ad4\u67b6\u69cb\u8207\u8cc7\u6599\u6a21\u578b\u7684\u9818\u57df\u4e2d\uff0c\u5f88\u5c11\u6709\u6982\u5ff5\u80fd\u50cf\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u4e00\u6a23\u5177\u6709\u5982\u6b64\u91cd\u8981\u7684\u5206\u91cf\u3002\u5728\u8a2d\u8a08\u7cfb\u7d71\u6642\uff0c\u7406\u89e3\u7269\u4ef6\u4e4b\u9593\u5982\u4f55\u4e92\u52d5\uff0c\u8207\u5b9a\u7fa9\u7269\u4ef6\u672c\u8eab\u540c\u6a23\u95dc\u9375\u3002\u9019\u7a2e\u4e92\u52d5\u4ee5\u6b63\u5f0f\u65b9\u5f0f\u900f\u904e<strong>\u985e\u5225\u5716\u591a\u91cd\u6027<\/strong>\u9019\u9805\u7b26\u865f\u4f86\u8868\u793a\u5169\u500b\u985e\u5225\u4e4b\u9593\u7684\u6578\u91cf\u95dc\u806f\u3002\u7121\u8ad6\u4f60\u662f\u898f\u5283\u8cc7\u6599\u5eab\u7d50\u69cb\uff0c\u9084\u662f\u8a2d\u8a08\u7269\u4ef6\u5c0e\u5411\u7684\u7a0b\u5f0f\u78bc\u67b6\u69cb\uff0c\u9019\u88e1\u7684\u6e05\u6670\u5ea6\u90fd\u80fd\u5728\u554f\u984c\u7522\u751f\u524d\u5c31\u907f\u514d\u67b6\u69cb\u4e0a\u7684\u8ca0\u50b5\u3002<\/p>\n<p>\u591a\u91cd\u6027\u5b9a\u7fa9\u4e86\u67d0\u500b\u985e\u5225\u7684\u5be6\u4f8b\u8207\u53e6\u4e00\u500b\u985e\u5225\u5be6\u4f8b\u4e4b\u9593\u95dc\u806f\u6578\u91cf\u7684\u9650\u5236\u3002\u5b83\u56de\u7b54\u4e86\u57fa\u672c\u554f\u984c\uff1a\u4e00\u500b\u4f7f\u7528\u8005\u80fd\u5426\u64c1\u6709\u591a\u4e2a\u500b\u4eba\u6a94\u6848\uff1f\u55ae\u4e00\u8a02\u55ae\u80fd\u5426\u5c6c\u65bc\u591a\u500b\u5ba2\u6236\uff1f\u9019\u4e9b\u5340\u5225\u5851\u9020\u4e86\u8cc7\u6599\u6d41\u52d5\u7684\u65b9\u5f0f\u8207\u61c9\u7528\u7a0b\u5f0f\u7684\u5b8c\u6574\u6027\u3002\u672c\u6307\u5357\u63a2\u8a0e\u6838\u5fc3\u7684\u57fa\u6578\u95dc\u4fc2\u2014\u20141:1\u30011:N \u548c N:N\uff0c\u8a73\u7d30\u8aaa\u660e\u5176\u5be6\u4f5c\u65b9\u5f0f\u3001\u5f71\u97ff\u8207\u5e38\u898b\u9677\u9631\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"A playful child's drawing style infographic explaining class diagram multiplicity: one-to-one (1:1) shown as a person with one passport, one-to-many (1:N) as a tree with many apples, and many-to-many (N:N) as students connected to courses via a junction table, with simple UML notation symbols (1, *, 0..1) in bright crayon colors on a white background, teaching software architecture relationships in an intuitive visual way\" decoding=\"async\" src=\"https:\/\/www.method-post.com\/wp-content\/uploads\/2026\/03\/multiplicity-relationships-infographic-childs-drawing.jpg\"\/><\/figure>\n<\/div>\n<h2>\u7406\u89e3\u57fa\u790e\uff1a\u7b26\u865f\u8207\u8853\u8a9e \ud83e\udde9<\/h2>\n<p>\u5728\u6df1\u5165\u63a2\u8a0e\u7279\u5b9a\u95dc\u4fc2\u985e\u578b\u4e4b\u524d\uff0c\u5efa\u7acb\u7d71\u4e00\u5851\u6a21\u8a9e\u8a00\uff08UML\uff09\u8207\u4e00\u822c\u8cc7\u6599\u6a21\u578b\u4e2d\u6240\u4f7f\u7528\u7684\u8853\u8a9e\u8a5e\u5f59\u81f3\u95dc\u91cd\u8981\u3002\u591a\u91cd\u6027\u4e0d\u50c5\u50c5\u662f\u8a08\u6578\uff0c\u66f4\u662f\u5728\u5b9a\u7fa9\u898f\u5247\u3002<\/p>\n<ul>\n<li><strong>\u57fa\u6578\uff1a<\/strong> \u53ef\u53c3\u8207\u95dc\u4fc2\u7684\u985e\u5225\u5be6\u4f8b\u6578\u91cf\u3002\u901a\u5e38\u4ee5\u6578\u5b57\u5982<code>1<\/code>, <code>*<\/code>\uff0c\u6216\u7bc4\u570d\u5982<code>0..1<\/code>.<\/li>\n<li><strong>\u53ef\u9078\u6027\uff1a<\/strong> \u985e\u5225\u7684\u5be6\u4f8b\u662f\u5426\u5fc5\u9808\u53c3\u8207\u8a72\u95dc\u4fc2\u3002\u4f8b\u5982\uff0c\u6bcf\u4f4d\u54e1\u5de5\u90fd\u5fc5\u9808\u6709\u7d93\u7406\u55ce\uff1f<\/li>\n<li><strong>\u95dc\u806f\uff1a<\/strong> \u9023\u7d50\u672c\u8eab\uff0c\u4ee3\u8868\u985e\u5225\u4e4b\u9593\u7684\u7d50\u69cb\u6027\u95dc\u4fc2\u3002<\/li>\n<\/ul>\n<p>\u7576\u4f60\u89c0\u5bdf\u985e\u5225\u5716\u6642\uff0c\u6703\u770b\u5230\u9023\u63a5\u65b9\u6846\u7684\u7dda\u689d\u3002\u9019\u4e9b\u7dda\u689d\u9644\u8fd1\u7684\u5c0f\u6578\u5b57\u6216\u7b26\u865f\u4ee3\u8868\u591a\u91cd\u6027\u3002\u9019\u4e9b\u7b26\u865f\u5982\u540c\u5408\u7d04\u3002\u82e5\u7cfb\u7d71\u908f\u8f2f\u9055\u53cd\u9019\u4e9b\u5408\u7d04\uff0c\u8cc7\u6599\u5c07\u8b8a\u5f97\u4e0d\u4e00\u81f4\u3002\u7406\u89e3\u6b64\u7b26\u865f\u662f\u9081\u5411\u7a69\u5065\u8a2d\u8a08\u7684\u7b2c\u4e00\u6b65\u3002<\/p>\n<h2>\u4e00\u5c0d\u4e00\u95dc\u4fc2\uff081:1\uff09 \ud83d\udd17<\/h2>\n<p>\u4e00\u5c0d\u4e00\u95dc\u4fc2\u662f\u6a19\u6e96\u95dc\u806f\u4e2d\u6700\u53d7\u9650\u5236\u7684\u4e00\u7a2e\u3002\u5b83\u8868\u793a\u5c0d\u65bc\u985e\u5225 A \u7684\u6bcf\u4e00\u500b\u5be6\u4f8b\uff0c\u6700\u591a\u53ea\u6709\u4e00\u500b\u985e\u5225 B \u7684\u5be6\u4f8b\u8207\u4e4b\u5c0d\u61c9\uff0c\u53cd\u4e4b\u4ea6\u7136\u3002\u9019\u901a\u5e38\u4ee5\u7b26\u865f<code>1<\/code>\u51fa\u73fe\u5728\u95dc\u806f\u7dda\u7684\u5169\u7aef\u3002<\/p>\n<h3>\u4f55\u6642\u4f7f\u7528 1:1 \u95dc\u806f<\/h3>\n<p>\u7576\u5169\u500b\u6982\u5ff5\u672c\u8cea\u4e0a\u662f\u540c\u4e00\u5be6\u9ad4\u7684\u4e0d\u540c\u89c0\u9ede\uff0c\u6216\u95dc\u806f\u5177\u6709\u6392\u4ed6\u6027\u8207\u6c38\u4e45\u6027\u6642\uff0c\u6b64\u95dc\u4fc2\u985e\u578b\u9069\u7528\u3002<\/p>\n<ul>\n<li><strong>\u9a57\u8b49\u91d1\u9470\uff1a<\/strong> \u4f7f\u7528\u8005\u5e33\u6236\u5728\u4efb\u4f55\u6642\u523b\u53ea\u80fd\u64c1\u6709\u4e00\u500b\u6d3b\u8e8d\u7684\u767b\u5165\u6703\u8a71\u91d1\u9470\u3002\u82e5\u4f7f\u7528\u8005\u518d\u6b21\u767b\u5165\uff0c\u5148\u524d\u7684\u91d1\u9470\u5c07\u88ab\u7121\u6548\u5316\u3002<\/li>\n<li><strong>\u8eab\u5206\u6587\u4ef6\uff1a<\/strong> \u62a4\u7167\u50c5\u767c\u7d66\u7279\u5b9a\u7684\u516c\u6c11\uff0c\u4e14\u6bcf\u4f4d\u516c\u6c11\u5728\u540c\u4e00\u6642\u9593\u50c5\u6301\u6709\u4e00\u5f35\u4e3b\u8981\u8b77\u7167\u3002<\/li>\n<li><strong>\u8a2d\u5b9a\u914d\u7f6e\uff1a<\/strong>\u7279\u5b9a\u7684\u61c9\u7528\u7a0b\u5f0f\u57f7\u884c\u500b\u9ad4\u901a\u5e38\u53ea\u6709\u4e00\u500b Configuration \u7269\u4ef6\uff0c\u7528\u4f86\u5132\u5b58\u5176\u57f7\u884c\u6642\u671f\u53c3\u6578\u3002<\/li>\n<\/ul>\n<h3>\u5be6\u4f5c\u8003\u91cf<\/h3>\n<p>\u5be6\u4f5c 1:1 \u95dc\u4fc2\u9700\u8981\u4ed4\u7d30\u6ce8\u610f\u5916\u9375\u548c\u8cc7\u6599\u5eab\u7d04\u675f\u3002\u5728\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u74b0\u5883\u4e2d\uff0c\u9019\u901a\u5e38\u900f\u904e\u5728\u5176\u4e2d\u4e00\u500b\u8868\u683c\u4e2d\u653e\u7f6e\u5916\u9375\u4f86\u9054\u6210\uff0c\u8a72\u5916\u9375\u53c3\u8003\u53e6\u4e00\u500b\u8868\u683c\u7684\u4e3b\u9375\u3002<\/p>\n<ul>\n<li><strong>\u8cc7\u6599\u5eab\u5916\u9375\uff1a<\/strong> \u60a8\u5fc5\u9808\u65b0\u589e\u4e00\u500b <code>\u5916\u9375<\/code>\u7d04\u675f\u4ee5\u78ba\u4fdd\u53c3\u8003\u5b8c\u6574\u6027\u3002\u9019\u53ef\u9632\u6b62\u5b64\u7acb\u8a18\u9304\u7684\u7522\u751f\u3002<\/li>\n<li><strong>\u552f\u4e00\u6027\u7d04\u675f\uff1a<\/strong> \u70ba\u4e86\u56b4\u683c\u5f37\u5236\u300c\u4e00\u300d\u7aef\uff0c\u5305\u542b\u5916\u9375\u7684\u6b04\u4f4d\u5fc5\u9808\u5177\u6709 <code>\u552f\u4e00<\/code>\u7d04\u675f\u3002\u9019\u78ba\u4fdd\u4e0d\u6703\u6709\u5169\u5217\u6307\u5411\u540c\u4e00\u500b\u7236\u9805\u76ee\u3002<\/li>\n<li><strong>\u7a0b\u5f0f\u78bc\u53c3\u8003\uff1a<\/strong> \u5728\u7269\u4ef6\u5c0e\u5411\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u9019\u901a\u5e38\u8868\u73fe\u70ba\u5c0d\u55ae\u4e00\u7269\u4ef6\u7684\u76f4\u63a5\u53c3\u8003\uff0c\u800c\u975e\u96c6\u5408\u3002\u4e00\u500b <code>User<\/code> \u985e\u5225\u53ef\u80fd\u6709\u4e00\u500b\u5c6c\u6027 <code>Profile<\/code>\uff0c\u985e\u578b\u70ba <code>Profile<\/code>\uff0c\u800c\u4e0d\u662f <code>List&lt;Profile&gt;<\/code>.<\/li>\n<\/ul>\n<h2>\u4e00\u5c0d\u591a\u95dc\u4fc2 (1:N) \ud83c\udf33<\/h2>\n<p>\u4e00\u5c0d\u591a\u95dc\u4fc2\u662f\u4f01\u696d\u7cfb\u7d71\u4e2d\u6700\u5e38\u898b\u7684\u95dc\u806f\u3002\u5728\u6b64\uff0cClass A \u7684\u55ae\u4e00\u5be6\u4f8b\u6703\u8207\u96f6\u500b\u6216\u66f4\u591a\u500b Class B \u7684\u5be6\u4f8b\u76f8\u95dc\u806f\u3002\u7136\u800c\uff0c\u6bcf\u500b Class B \u7684\u5be6\u4f8b\u50c5\u8207 Class A \u7684\u4e00\u500b\u5be6\u4f8b\u76f8\u95dc\u806f\u3002\u7b26\u865f\u901a\u5e38\u5728\u5176\u4e2d\u4e00\u7aef\u986f\u793a <code>1<\/code>\uff0c\u5728\u53e6\u4e00\u7aef\u986f\u793a <code>*<\/code>\uff08\u6216 <code>0..*<\/code>\uff09<\/p>\n<h3>\u5e38\u898b\u60c5\u5883<\/h3>\n<p>\u6b64\u6a21\u5f0f\u63cf\u8ff0\u4e86\u5c64\u7d1a\u8cc7\u6599\uff0c\u5176\u4e2d\u7236\u9805\u76ee\u64c1\u6709\u591a\u4e2a\u5b50\u9805\u76ee\u3002<\/p>\n<ul>\n<li><strong>\u8a02\u55ae\u8207\u660e\u7d30\u9805\u76ee\uff1a<\/strong>\u4e00\u500b\u8a02\u55ae\u5305\u542b\u591a\u500b\u660e\u7d30\u9805\u76ee\uff0c\u4f46\u6bcf\u500b\u660e\u7d30\u9805\u76ee\u50c5\u5c6c\u65bc\u4e00\u500b\u8a02\u55ae\u3002<\/li>\n<li><strong>\u90e8\u9580\u8207\u54e1\u5de5\uff1a<\/strong>\u4e00\u500b\u90e8\u9580\u96c7\u7528\u591a\u540d\u54e1\u5de5\uff0c\u4f46\u4e00\u540d\u54e1\u5de5\u50c5\u88ab\u5206\u914d\u5230\u4e00\u500b\u90e8\u9580\uff08\u5728\u7c21\u55ae\u7d50\u69cb\u4e2d\uff09\u3002<\/li>\n<li><strong>\u5206\u985e\u8207\u7522\u54c1\uff1a<\/strong>\u4e00\u500b\u7522\u54c1\u5206\u985e\u5305\u542b\u591a\u500b\u7522\u54c1\uff0c\u4f46\u4e00\u500b\u7522\u54c1\u50c5\u5c6c\u65bc\u4e00\u500b\u7279\u5b9a\u5206\u985e\u3002<\/li>\n<\/ul>\n<h3>\u8cc7\u6599\u7d50\u69cb\u5316<\/h3>\n<p>\u5728\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u4e2d\u5be6\u4f5c 1:N \u95dc\u806f\u95dc\u4fc2\u76f8\u7576\u76f4\u63a5\uff0c\u4f46\u5728\u8a18\u61b6\u9ad4\u6a21\u578b\u4e2d\u5247\u9700\u8981\u7279\u5225\u8655\u7406\u3002<\/p>\n<ul>\n<li><strong>\u5916\u9375\u653e\u7f6e\uff1a<\/strong> \u5916\u9375\u4f4d\u65bc\u300c\u591a\u300d\u7684\u4e00\u65b9\uff08\u5b50\u8cc7\u6599\u8868\uff09\u3002\u8a02\u55ae\u8cc7\u6599\u8868\u5c07\u6709\u4e00\u500b <code>order_id<\/code> \u6b04\u4f4d\u9023\u7d50\u81f3\u660e\u7d30\u9805\u76ee\u8cc7\u6599\u8868\u3002<\/li>\n<li><strong>\u96c6\u5408\u7ba1\u7406\uff1a<\/strong> \u5728\u300c\u4e00\u300d\u7684\u4e00\u65b9\uff08\u7236\u7269\u4ef6\uff09\uff0c\u901a\u5e38\u6703\u7dad\u8b77\u4e00\u500b\u96c6\u5408\u3002\u4e00\u500b <code>Customer<\/code> \u7269\u4ef6\u5c07\u5305\u542b\u4e00\u500b\u8a02\u55ae\u7269\u4ef6\u7684\u6e05\u55ae\u6216\u9663\u5217\u3002<code>Order<\/code> \u7269\u4ef6\u3002<\/li>\n<li><strong>\u6548\u80fd\u5f71\u97ff\uff1a<\/strong> \u5982\u679c\u96c6\u5408\u5f88\u5927\uff0c\u53d6\u5f97\u300c\u591a\u300d\u7684\u4e00\u65b9\u53ef\u80fd\u6703\u8b8a\u5f97\u6602\u8cb4\u3002\u901a\u5e38\u6703\u4f7f\u7528\u61f6\u52a0\u8f09\uff0c\u50c5\u5728\u5b58\u53d6\u6642\u624d\u8f09\u5165\u5b50\u7269\u4ef6\uff0c\u4ee5\u6e1b\u5c11\u521d\u59cb\u67e5\u8a62\u7684\u8ca0\u64d4\u3002<\/li>\n<\/ul>\n<h3>\u8655\u7406\u7d1a\u806f\u522a\u9664<\/h3>\n<p>\u5728 1:N \u8a2d\u8a08\u4e2d\uff0c\u4e00\u500b\u95dc\u9375\u6c7a\u7b56\u662f\u7576\u7236\u9805\u76ee\u88ab\u79fb\u9664\u6642\u6703\u767c\u751f\u4ec0\u9ebc\u3002\u5982\u679c\u4f60\u522a\u9664\u4e00\u500b\u90e8\u9580\uff0c\u662f\u5426\u4e5f\u8981\u522a\u9664\u6240\u6709\u54e1\u5de5\uff1f\u901a\u5e38\u7b54\u6848\u662f\u5426\u5b9a\u7684\uff0c\u4f46\u7cfb\u7d71\u5fc5\u9808\u59a5\u5584\u8655\u7406\u3002<\/p>\n<ul>\n<li><strong>\u7d1a\u806f\u522a\u9664\uff1a<\/strong> \u7576\u7236\u9805\u76ee\u88ab\u522a\u9664\u6642\uff0c\u81ea\u52d5\u79fb\u9664\u6240\u6709\u5b50\u8a18\u9304\u3002\u9069\u7528\u65bc\u66ab\u6642\u6027\u8cc7\u6599\uff0c\u4f8b\u5982\u8a02\u55ae\u8a18\u9304\u3002<\/li>\n<li><strong>\u9650\u5236\u522a\u9664\uff1a<\/strong> \u5982\u679c\u5b58\u5728\u5b50\u9805\u76ee\uff0c\u5247\u7981\u6b62\u522a\u9664\u7236\u9805\u76ee\u3002\u9069\u7528\u65bc\u6838\u5fc3\u8cc7\u6599\uff0c\u4f8b\u5982\u7522\u54c1\u3002<\/li>\n<li><strong>\u8a2d\u70ba\u7a7a\u503c\uff1a<\/strong> \u5c07\u5b50\u9805\u76ee\u4e2d\u7684\u5916\u9375\u8a2d\u70ba\u7a7a\u503c\u3002\u9700\u8981\u5b50\u9805\u76ee\u5141\u8a31\u7a7a\u503c\u3002<\/li>\n<\/ul>\n<h2>\u591a\u5c0d\u591a\u95dc\u4fc2 (N:N) \ud83d\udd78\ufe0f<\/h2>\n<p>\u591a\u5c0d\u591a\u95dc\u4fc2\u662f\u4e09\u7a2e\u95dc\u4fc2\u4e2d\u6700\u8907\u96dc\u7684\u4e00\u7a2e\u3002\u7576\u985e\u5225 A \u7684\u5be6\u4f8b\u53ef\u4ee5\u8207\u985e\u5225 B \u7684\u591a\u500b\u5be6\u4f8b\u76f8\u95dc\u806f\uff0c\u4e14\u985e\u5225 B \u7684\u5be6\u4f8b\u4e5f\u53ef\u4ee5\u8207\u985e\u5225 A \u7684\u591a\u500b\u5be6\u4f8b\u76f8\u95dc\u806f\u6642\uff0c\u5c31\u6703\u767c\u751f\u9019\u7a2e\u95dc\u4fc2\u3002\u7b26\u865f\u5728\u5169\u7aef\u986f\u793a<code>*<\/code>\uff08\u6216<code>0..*<\/code>\uff09\u5728\u5169\u7aef\u3002<\/p>\n<h3>\u73fe\u5be6\u4e16\u754c\u4e2d\u7684\u7bc4\u4f8b<\/h3>\n<p>\u9019\u7a2e\u95dc\u4fc2\u5e38\u898b\u65bc\u6d89\u53ca\u6a19\u7c64\u3001\u89d2\u8272\u6216\u8a3b\u518a\u7684\u5834\u666f\u4e2d\u3002<\/p>\n<ul>\n<li><strong>\u5b78\u751f\u8207\u8ab2\u7a0b\uff1a<\/strong>\u4e00\u540d\u5b78\u751f\u6703\u8a3b\u518a\u591a\u9580\u8ab2\u7a0b\uff0c\u800c\u4e00\u9580\u8ab2\u7a0b\u6703\u6709\u8a31\u591a\u5b78\u751f\u3002<\/li>\n<li><strong>\u4f5c\u8005\u8207\u66f8\u7c4d\uff1a<\/strong>\u4e00\u4f4d\u4f5c\u8005\u64b0\u5beb\u591a\u672c\u66f8\u7c4d\uff0c\u800c\u4e00\u672c\u66f8\u53ef\u4ee5\u6709\u591a\u4f4d\u4f5c\u8005\uff08\u5171\u540c\u4f5c\u8005\uff09\u3002<\/li>\n<li><strong>\u6280\u80fd\u8207\u54e1\u5de5\uff1a<\/strong>\u4e00\u540d\u54e1\u5de5\u64c1\u6709\u8a31\u591a\u6280\u80fd\uff0c\u800c\u4e00\u7a2e\u6280\u80fd\u7531\u591a\u4f4d\u54e1\u5de5\u64c1\u6709\u3002<\/li>\n<\/ul>\n<h3>\u9023\u7d50\u5be6\u9ad4\u89e3\u6c7a\u65b9\u6848<\/h3>\n<p>\u5728\u95dc\u4fc2\u578b\u8cc7\u6599\u5eab\u4e2d\u76f4\u63a5\u5be6\u4f5c N:N \u95dc\u4fc2\u662f\u4e0d\u53ef\u80fd\u7684\u3002\u55ae\u4e00\u7684\u5916\u9375\u7121\u6cd5\u5728\u4e0d\u7522\u751f\u6b67\u7fa9\u7684\u60c5\u6cc1\u4e0b\u96d9\u5411\u9023\u7d50\u5169\u500b\u8cc7\u6599\u8868\u3002\u89e3\u6c7a\u65b9\u6848\u662f\u5f15\u5165\u4e00\u500b<strong>\u9023\u7d50\u8cc7\u6599\u8868<\/strong>\uff08\u6216\u95dc\u806f\u5be6\u9ad4\uff09\u3002<\/p>\n<p>\u9019\u500b\u4e2d\u9593\u8cc7\u6599\u8868\u5c07 N:N \u95dc\u4fc2\u62c6\u5206\u6210\u5169\u500b 1:N \u95dc\u4fc2\u3002<\/p>\n<ul>\n<li><strong>\u7d50\u69cb\uff1a<\/strong> \u9023\u7d50\u8cc7\u6599\u8868\u5305\u542b\u5169\u500b\u76f8\u95dc\u8cc7\u6599\u8868\u7684\u4e3b\u9375\u4f5c\u70ba\u5916\u9375\u3002<\/li>\n<li><strong>\u984d\u5916\u8cc7\u6599\uff1a<\/strong>\u8207\u7c21\u55ae\u7684\u9023\u7d50\u4e0d\u540c\uff0c\u9023\u7d50\u8cc7\u6599\u8868\u53ef\u4ee5\u64c1\u6709\u81ea\u5df1\u7684\u5c6c\u6027\u3002\u4f8b\u5982\uff0c\u5b78\u751f\u8207\u8ab2\u7a0b\u4e4b\u9593\u7684\u9023\u7d50\u53ef\u80fd\u9700\u8981\u4e00\u500b<code>\u6210\u7e3e<\/code>\u6216<code>\u8a3b\u518a\u65e5\u671f<\/code>.<\/li>\n<li><strong>\u8907\u5408\u9375\uff1a<\/strong> \u9023\u7d50\u8cc7\u6599\u8868\u7684\u4e3b\u9375\u901a\u5e38\u662f\u5305\u542b\u5169\u500b\u5916\u9375\u7684\u8907\u5408\u9375\uff0c\u4ee5\u78ba\u4fdd\u914d\u5c0d\u7684\u552f\u4e00\u6027\u3002<\/li>\n<\/ul>\n<h3>\u7269\u4ef6\u5c0e\u5411\u5be6\u4f5c<\/h3>\n<p>\u5728\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u7ba1\u7406 N:N \u95dc\u4fc2\u9700\u8981\u7dad\u6301\u96d9\u5411\u4e00\u81f4\u6027\u3002\u5982\u679c\u4f60\u5c07\u4e00\u9580\u8ab2\u7a0b\u52a0\u5165\u5b78\u751f\u7684\u6e05\u55ae\u4e2d\uff0c\u4f60\u4e5f\u5fc5\u9808\u5c07\u8a72\u5b78\u751f\u52a0\u5165\u8ab2\u7a0b\u7684\u6e05\u55ae\u4e2d\u3002<\/p>\n<ul>\n<li><strong>\u540c\u6b65\uff1a<\/strong>\u61c9\u5efa\u7acb\u8f14\u52a9\u65b9\u6cd5\u4f86\u7ba1\u7406\u9019\u4e9b\u9023\u7d50\u3002\u4e00\u500b<code>Student.addCourse(Course c)<\/code>\u65b9\u6cd5\u61c9\u81ea\u52d5\u5c07\u5b78\u751f\u52a0\u5165\u8ab2\u7a0b\u7684\u6e05\u55ae\u4e2d\u3002<\/li>\n<li><strong>\u8a18\u61b6\u9ad4\u4f7f\u7528\uff1a<\/strong> \u7531\u65bc\u8cc7\u6599\u5728\u5169\u500b\u96c6\u5408\uff08\u5b78\u751f\u7684\u6e05\u55ae\u8207\u8ab2\u7a0b\u7684\u6e05\u55ae\uff09\u4e2d\u91cd\u8907\u5132\u5b58\uff0c\u8a18\u61b6\u9ad4\u4f7f\u7528\u91cf\u6703\u589e\u52a0\u3002\u82e5\u79fb\u9664\u9023\u7d50\uff0c\u8acb\u78ba\u4fdd\u5783\u573e\u56de\u6536\u6a5f\u5236\u80fd\u8655\u7406\u5b64\u7acb\u7684\u53c3\u8003\u3002<\/li>\n<\/ul>\n<h2>\u57fa\u6578\u8207\u53ef\u9078\u6027\uff1a\u4e00\u500b\u95dc\u9375\u7684\u5340\u5225 \u2696\ufe0f<\/h2>\n<p>\u5728\u8a0e\u8ad6\u591a\u91cd\u6027\u6642\uff0c\u5340\u5206\u300c\u6578\u91cf\u591a\u5c11\u300d\u8207\u300c\u662f\u5426\u5fc5\u8981\u300d\u81f3\u95dc\u91cd\u8981\u3002\u9019\u5169\u8005\u7d93\u5e38\u88ab\u6df7\u6dc6\uff0c\u4f46\u4ee3\u8868\u4e0d\u540c\u7684\u898f\u5247\u3002<\/p>\n<ul>\n<li><strong>\u6700\u5c0f\u57fa\u6578\uff1a<\/strong> \u6240\u9700\u7684\u6700\u5c11\u5be6\u4f8b\u6578\u91cf\u3002\u901a\u5e38\u70ba 0 \u6216 1\u3002<\/li>\n<li><strong>\u6700\u5927\u57fa\u6578\uff1a<\/strong> \u5141\u8a31\u7684\u6700\u5927\u5be6\u4f8b\u6578\u91cf\u3002\u901a\u5e38\u70ba 1 \u6216\u591a\u500b\uff08*\uff09\u3002<\/li>\n<li><strong>\u96f6\u500b\u6216\u4e00\u500b\uff080..1\uff09\uff1a<\/strong> \u6b64\u95dc\u4fc2\u70ba\u53ef\u9078\u3002\u8a72\u5be6\u4f8b\u53ef\u80fd\u4e0d\u5b58\u5728\u3002<\/li>\n<li><strong>\u4e00\u500b\u6216\u591a\u500b\uff081..*\uff09\uff1a<\/strong> \u6b64\u95dc\u4fc2\u70ba\u5fc5\u8981\u3002\u8a72\u5be6\u4f8b\u5fc5\u9808\u5b58\u5728\uff0c\u4e14\u53ef\u6709\u591a\u500b\u3002<\/li>\n<\/ul>\n<p>\u8003\u616e\u4e00\u500b<code>\u54e1\u5de5<\/code> \u8207<code>\u7d93\u7406<\/code> \u7684\u95dc\u4fc2\u3002\u4e00\u540d\u54e1\u5de5\u5fc5\u9808\u6709\u4e00\u4f4d\u7d93\u7406\uff081..1\uff09\uff0c\u4f46\u7d93\u7406\u5728\u7279\u5b9a\u6642\u523b\u53ef\u80fd\u4e0d\u7ba1\u7406\u4efb\u4f55\u4eba\uff080..*\uff09\u3002\u7406\u89e3\u9019\u4e9b\u7d30\u7bc0\u53ef\u8b93\u8cc7\u6599\u5eab\u7684\u7d04\u675f\u8207\u9a57\u8b49\u908f\u8f2f\u66f4\u70ba\u7cbe\u78ba\u3002<\/p>\n<h2>\u5c07\u8a2d\u8a08\u8f49\u63db\u70ba\u5be6\u4f5c \ud83d\udee0\ufe0f<\/h2>\n<p>\u4e00\u65e6\u985e\u5225\u5716\u78ba\u5b9a\u5f8c\uff0c\u8f49\u63db\u5230\u5be6\u969b\u7a0b\u5f0f\u78bc\u8207\u5132\u5b58\u7d50\u69cb\uff0c\u5c31\u9700\u8981\u91dd\u5c0d\u6bcf\u7a2e\u95dc\u4fc2\u985e\u578b\u5236\u5b9a\u7279\u5b9a\u7b56\u7565\u3002<\/p>\n<h3>\u8cc7\u6599\u5eab\u7d50\u69cb\u8a2d\u8a08<\/h3>\n<p>\u7269\u7406\u7d50\u69cb\u662f\u7cfb\u7d71\u4e2d\u6700\u50f5\u5316\u7684\u90e8\u5206\u3002\u5728\u6b64\u8655\u9032\u884c\u8b8a\u66f4\u6210\u672c\u9ad8\u6602\u3002<\/p>\n<ul>\n<li><strong>\u6b63\u898f\u5316\uff1a<\/strong> \u78ba\u4fdd\u4f60\u7684\u8a2d\u8a08\u9075\u5faa\u6b63\u898f\u5316\u898f\u5247\uff08\u901a\u5e38\u81f3\u7b2c\u4e09\u6b63\u898f\u5316\u5f62\u5f0f 3NF\uff09\u3002\u91cd\u8907\u8cc7\u6599\u901a\u5e38\u6e90\u81ea\u5c0d\u95dc\u4fc2\u7684\u8aa4\u89e3\u3002<\/li>\n<li><strong>\u7d22\u5f15\uff1a<\/strong> \u5916\u9375\u6b04\u4f4d\u61c9\u5efa\u7acb\u7d22\u5f15\u3002\u9019\u80fd\u986f\u8457\u52a0\u5feb\u9023\u63a5\u64cd\u4f5c\u8207\u7d04\u675f\u6aa2\u67e5\u7684\u901f\u5ea6\u3002<\/li>\n<li><strong>\u8cc7\u6599\u985e\u578b\uff1a<\/strong> \u78ba\u4fdd\u4e3b\u9375\u7684\u8cc7\u6599\u985e\u578b\u8207\u5916\u9375\u5b8c\u5168\u5339\u914d\u3002\u985e\u578b\u4e0d\u5339\u914d\u6703\u5c0e\u81f4\u57f7\u884c\u6642\u9593\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h3>\u61c9\u7528\u5c64\u908f\u8f2f<\/h3>\n<p>\u7a0b\u5f0f\u78bc\u5c64\u662f\u696d\u52d9\u898f\u5247\u5f37\u5236\u57f7\u884c\u95dc\u4fc2\u7684\u5730\u65b9\u3002<\/p>\n<ul>\n<li><strong>\u9a57\u8b49\uff1a<\/strong> \u5728\u5132\u5b58\u7269\u4ef6\u4e4b\u524d\uff0c\u9a57\u8b49\u95dc\u4fc2\u7d04\u675f\u662f\u5426\u5df2\u6eff\u8db3\u3002\u4f8b\u5982\uff0c\u4e0d\u61c9\u5141\u8a31\u5b78\u751f\u8a3b\u518a\u5df2\u6eff\u984d\u7684\u8ab2\u7a0b\u3002<\/li>\n<li><strong>\u4ea4\u6613\u7ba1\u7406\uff1a<\/strong> \u5728\u5efa\u7acb\u6216\u66f4\u65b0\u76f8\u95dc\u7269\u4ef6\u6642\uff0c\u5c07\u64cd\u4f5c\u5305\u88dd\u5728\u4ea4\u6613\u4e2d\u3002\u9019\u53ef\u78ba\u4fdd\u82e5\u95dc\u4fc2\u4e2d\u7684\u67d0\u4e00\u90e8\u5206\u5931\u6557\uff0c\u6574\u500b\u8b8a\u66f4\u90fd\u6703\u88ab\u56de\u6efe\u3002<\/li>\n<li><strong>API \u56de\u61c9\uff1a<\/strong> \u5728\u900f\u904e API \u66b4\u9732\u8cc7\u6599\u6642\uff0c\u6c7a\u5b9a\u76f8\u95dc\u7269\u4ef6\u7684\u5d4c\u5957\u6df1\u5ea6\u3002\u5728\u55ae\u4e00\u56de\u61c9\u4e2d\u8fd4\u56de\u5305\u542b\u6240\u6709\u8a02\u55ae\u7684\u5b8c\u6574\u5ba2\u6236\u7269\u4ef6\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6548\u80fd\u74f6\u9838\u3002<\/li>\n<\/ul>\n<h2>\u5e38\u898b\u9677\u9631\u8207\u53cd\u6a21\u5f0f \ud83d\udeab<\/h2>\n<p>\u5373\u4f7f\u7d93\u9a57\u8c50\u5bcc\u7684\u8a2d\u8a08\u5e2b\u5728\u5b9a\u7fa9\u591a\u6a23\u6027\u6642\u4e5f\u6703\u72af\u932f\u3002\u53ca\u65e9\u8b58\u5225\u9019\u4e9b\u6a21\u5f0f\u53ef\u5927\u5e45\u7bc0\u7701\u5f8c\u7e8c\u7684\u91cd\u69cb\u6642\u9593\u3002<\/p>\n<ul>\n<li><strong>\u5047\u8a2d N:N \u6c38\u9060\u662f\u5fc5\u8981\u7684\uff1a<\/strong> \u5982\u679c\u5169\u500b\u5be6\u9ad4\u770b\u4f3c\u6709\u95dc\u806f\uff0c\u8acb\u6aa2\u67e5\u5b83\u5011\u662f\u5426\u771f\u7684\u9700\u8981\u76f4\u63a5\u9023\u7d50\u3002\u82e5\u95dc\u4fc2\u5177\u6709\u65b9\u5411\u6027\uff0c\u901a\u5e38 1:N \u5df2\u8db3\u5920\u3002<\/li>\n<li><strong>\u5ffd\u7565\u53ef\u9078\u6027\uff1a<\/strong> \u7576\u95dc\u4fc2\u5be6\u969b\u4e0a\u662f\u53ef\u9078\u7684\uff080..1\uff09\u6642\uff0c\u537b\u8a2d\u8a08\u70ba\u5f37\u5236\u9023\u7d50\uff081..1\uff09\uff0c\u6703\u5c0e\u81f4\u8cc7\u6599\u8f38\u5165\u932f\u8aa4\u8207\u7cfb\u7d71\u50f5\u5316\u3002<\/li>\n<li><strong>\u5faa\u74b0\u4f9d\u8cf4\uff1a<\/strong> \u7576\u985e\u5225 A \u53c3\u8003\u985e\u5225 B\uff0c\u800c\u985e\u5225 B \u53c8\u53c3\u8003\u985e\u5225 A \u6642\uff0c\u5e8f\u5217\u5316\u8207\u8a18\u61b6\u9ad4\u7ba1\u7406\u53ef\u80fd\u8b8a\u5f97\u8907\u96dc\u3002\u5728\u904d\u6b77\u6f14\u7b97\u6cd5\u4e2d\u4f7f\u7528\u6df1\u5ea6\u905e\u8ff4\u6642\u9700\u8b39\u614e\u3002<\/li>\n<li><strong>\u904e\u5ea6\u8a2d\u8a08\u7684\u95dc\u806f\u8868\uff1a<\/strong> \u5982\u679c\u95dc\u4fc2\u7c21\u55ae\u4e14\u4e0d\u9700\u8981\u7368\u7acb\u5c6c\u6027\uff0c\u5c31\u4e0d\u61c9\u5efa\u7acb\u95dc\u806f\u8868\u3002\u6709\u6642\u55ae\u4e00\u5916\u9375\u5df2\u8db3\u5920\u3002<\/li>\n<\/ul>\n<h2>\u95dc\u4fc2\u985e\u578b\u6bd4\u8f03 \ud83d\udcca<\/h2>\n<p>\u7e3d\u7d50\u5dee\u7570\u8207\u6b0a\u8861\uff0c\u8acb\u53c3\u8003\u9019\u4efd\u95dc\u65bc\u4e09\u7a2e\u4e3b\u8981\u57fa\u6578\u7684\u6982\u8ff0\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u529f\u80fd<\/th>\n<th>\u4e00\u5c0d\u4e00 (1:1)<\/th>\n<th>\u4e00\u5c0d\u591a (1:N)<\/th>\n<th>\u591a\u5c0d\u591a (N:N)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u7b26\u865f<\/strong><\/td>\n<td>1 \u2014 1<\/td>\n<td>1 \u2014 *<\/td>\n<td>* \u2014 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\u5728\u8a2d\u8a08\u968e\u6bb5\u6aa2\u67e5\u95dc\u4fc2\uff0c\u4ee5\u9632\u6b62\u67b6\u69cb\u50b5\u52d9\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u8edf\u9ad4\u67b6\u69cb\u8207\u8cc7\u6599\u6a21\u578b\u7684\u9818\u57df\u4e2d\uff0c\u5f88\u5c11\u6709\u6982\u5ff5\u80fd\u50cf\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u4e00&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1118,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"\u985e\u5716\u591a\u91cd\u6027\u6307\u5357\uff1a1:1\u30011:N\u3001N:N \u89e3\u91cb","_yoast_wpseo_metadesc":"\u5168\u9762\u4e86\u89e3\u985e\u5716\u591a\u91cd\u6027\u7684\u6307\u5357\u3002\u5b78\u7fd2\u5982\u4f55\u5728\u8cc7\u6599\u6a21\u578b\u548c\u8edf\u9ad4\u8a2d\u8a08\u4e2d\u5be6\u73fe 1:1\u30011:N \u548c N:N 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