{"id":15346,"date":"2023-02-05T23:28:01","date_gmt":"2023-02-05T15:28:01","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=15346"},"modified":"2023-02-05T23:28:01","modified_gmt":"2023-02-05T15:28:01","slug":"java%e7%9a%84%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e7%94%a8%e4%bb%80%e4%b9%88%e8%bd%af%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/15346.html","title":{"rendered":"Java\u7684\u8bbe\u8ba1\u6a21\u5f0f\u7528\u4ec0\u4e48\u8f6f\u4ef6"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\">\n<p>\u8bbe\u8ba1\u6a21\u5f0f\u4e8b\u662f\u7a0b\u5e8f\u5458\u5728\u9762\u5bf9\u540c\u7c7b\u8f6f\u4ef6\u5de5\u7a0b\u8bbe\u8ba1\u95ee\u9898\u6240\u603b\u7ed3\u51fa\u6765\u7684\u6709\u7528\u7684\u7ecf\u9a8c\uff0c\u6a21\u5f0f\u4e0d\u662f\u4ee3\u7801,\u662f\u67d0\u7c7b\u95ee\u9898\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u8868\u4e86\u4f18\u5f02\u5b9e\u8df5\u3002\u8fd9\u4e9b\u89e3\u51b3\u65b9\u6848\u662f\u4f17\u591a\u8f6f\u4ef6\u5f00\u53d1\u4eba\u5458\u7ecf\u8fc7\u76f8\u5f53\u957f\u7684\u4e00\u6bb5\u65f6\u95f4\u7684\u5b9e\u9a8c\u548c\u9519\u8bef\u603b\u7ed3\u51fa\u6765\u7684\u3002<\/p>\n<\/blockquote>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"680\" height=\"421\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/02\/Java\u7684\u8bbe\u8ba1\u6a21\u5f0f\u7528\u4ec0\u4e48\u8f6f\u4ef6.png?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"\" class=\"wp-image-15347\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/02\/Java\u7684\u8bbe\u8ba1\u6a21\u5f0f\u7528\u4ec0\u4e48\u8f6f\u4ef6.png 680w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/02\/Java\u7684\u8bbe\u8ba1\u6a21\u5f0f\u7528\u4ec0\u4e48\u8f6f\u4ef6-300x186.png 300w\" sizes=\"(max-width: 680px) 100vw, 680px\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u4ec0\u4e48\u662f\u8bbe\u8ba1\u6a21\u5f0f<\/h2>\n\n\n\n<p>\u8f6f\u4ef6\u8bbe\u8ba1\u6a21\u5f0f\uff08Design pattern\uff09\uff0c\u53c8\u79f0\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u662f\u4e00\u5957\u88ab\u53cd\u590d\u4f7f\u7528\u3001\u591a\u6570\u4eba\u77e5\u6653\u7684\u3001\u7ecf\u8fc7\u5206\u7c7b\u7f16\u76ee\u7684\u3001\u4ee3\u7801\u8bbe\u8ba1\u7ecf\u9a8c\u7684\u603b\u7ed3\u3002\u4f7f\u7528\u8bbe\u8ba1\u6a21\u5f0f\u662f\u4e3a\u4e86\u53ef\u91cd\u7528\u4ee3\u7801\u3001\u8ba9\u4ee3\u7801\u66f4\u5bb9\u6613\u88ab\u4ed6\u4eba\u7406\u89e3\u3001\u4fdd\u8bc1\u4ee3\u7801\u53ef\u9760\u6027\u3001\u7a0b\u5e8f\u7684\u91cd\u7528\u6027\u3002<\/p>\n\n\n\n<p>\u8bbe\u8ba1\u6a21\u5f0f(\u82f1\u8bed design pattern)\u662f\u5bf9\u9762\u5411\u5bf9\u8c61\u8bbe\u8ba1\u4e2d\u53cd\u590d\u51fa\u73b0\u7684\u95ee\u9898\u7684\u89e3\u51b3\u65b9\u6848\u3002\u8fd9\u4e2a\u672f\u8bed\u662f\u57281990\u5e74\u4ee3\u7531Erich Gamma\u7b49\u4eba\u4ece\u5efa\u7b51\u8bbe\u8ba1\u9886\u57df\u5f15\u5165\u5230\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d\u6765\u7684\u3002\u8fd9\u4e2a\u672f\u8bed\u7684\u542b\u4e49\u8fd8\u5b58\u6709\u4e89\u8bae\u3002\u7b97\u6cd5\u4e0d\u662f\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u56e0\u4e3a\u7b97\u6cd5\u81f4\u529b\u4e8e\u89e3\u51b3\u95ee\u9898\u800c\u975e\u8bbe\u8ba1\u95ee\u9898\u3002\u8bbe\u8ba1\u6a21\u5f0f\u901a\u5e38\u63cf\u8ff0\u4e86\u4e00\u7ec4\u76f8\u4e92\u7d27\u5bc6\u4f5c\u7528\u7684\u7c7b\u4e0e\u5bf9\u8c61\u3002\u8bbe\u8ba1\u6a21\u5f0f\u63d0\u4f9b\u4e00\u79cd\u8ba8\u8bba\u8f6f\u4ef6\u8bbe\u8ba1\u7684\u516c\u5171\u8bed\u8a00\uff0c\u4f7f\u5f97\u719f\u7ec3\u8bbe\u8ba1\u8005\u7684\u8bbe\u8ba1\u7ecf\u9a8c\u53ef\u4ee5\u88ab\u521d\u5b66\u8005\u548c\u5176\u4ed6\u8bbe\u8ba1\u8005\u638c\u63e1\u3002\u8bbe\u8ba1\u6a21\u5f0f\u8fd8\u4e3a\u8f6f\u4ef6\u91cd\u6784\u63d0\u4f9b\u4e86\u76ee\u6807\u3002<\/p>\n\n\n\n<p>\u968f\u7740\u8f6f\u4ef6\u5f00\u53d1\u793e\u7fa4\u5bf9\u8bbe\u8ba1\u6a21\u5f0f\u7684\u5174\u8da3\u65e5\u76ca\u589e\u957f\uff0c\u5df2\u7ecf\u51fa\u7248\u4e86\u4e00\u4e9b\u76f8\u5173\u7684\u4e13\u8457\uff0c\u5b9a\u671f\u53ec\u5f00\u76f8\u5e94\u7684\u7814\u8ba8\u4f1a\uff0c\u800c\u4e14Ward Cunningham\u4e3a\u6b64\u53d1\u660e\u4e86WikiWiki\u7528\u6765\u4ea4\u6d41\u8bbe\u8ba1\u6a21\u5f0f\u7684\u7ecf\u9a8c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u8bbe\u8ba1\u6a21\u5f0f\u7684\u4e03\u5927\u539f\u5219<\/h2>\n\n\n\n<p><strong>1\u3001\u5f00\u95ed\u539f\u5219\uff08Open Close Principle\uff09<\/strong><\/p>\n\n\n\n<p>\u5f00\u95ed\u539f\u5219\u7684\u610f\u601d\u662f\uff1a\u5bf9\u6269\u5c55\u5f00\u653e\uff0c\u5bf9\u4fee\u6539\u5173\u95ed\u3002\u5728\u7a0b\u5e8f\u9700\u8981\u8fdb\u884c\u62d3\u5c55\u7684\u65f6\u5019\uff0c\u4e0d\u80fd\u53bb\u4fee\u6539\u539f\u6709\u7684\u4ee3\u7801\uff0c\u5b9e\u73b0\u4e00\u4e2a\u70ed\u63d2\u62d4\u7684\u6548\u679c\u3002\u7b80\u8a00\u4e4b\uff0c\u662f\u4e3a\u4e86\u4f7f\u7a0b\u5e8f\u7684\u6269\u5c55\u6027\u597d\uff0c\u6613\u4e8e\u7ef4\u62a4\u548c\u5347\u7ea7\u3002\u60f3\u8981\u8fbe\u5230\u8fd9\u6837\u7684\u6548\u679c\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528\u63a5\u53e3\u548c\u62bd\u8c61\u7c7b\uff0c\u540e\u9762\u7684\u5177\u4f53\u8bbe\u8ba1\u4e2d\u6211\u4eec\u4f1a\u63d0\u5230\u8fd9\u70b9\u3002<\/p>\n\n\n\n<p><strong>2\u3001\u91cc\u6c0f\u4ee3\u6362\u539f\u5219\uff08Liskov Substitution Principle\uff09<\/strong><\/p>\n\n\n\n<p>\u91cc\u6c0f\u4ee3\u6362\u539f\u5219\u662f\u9762\u5411\u5bf9\u8c61\u8bbe\u8ba1\u7684\u57fa\u672c\u539f\u5219\u4e4b\u4e00\u3002\u91cc\u6c0f\u4ee3\u6362\u539f\u5219\u4e2d\u8bf4\uff0c\u4efb\u4f55\u57fa\u7c7b\u53ef\u4ee5\u51fa\u73b0\u7684\u5730\u65b9\uff0c\u5b50\u7c7b\u4e00\u5b9a\u53ef\u4ee5\u51fa\u73b0\u3002LSP \u662f\u7ee7\u627f\u590d\u7528\u7684\u57fa\u77f3\uff0c\u53ea\u6709\u5f53\u6d3e\u751f\u7c7b\u53ef\u4ee5\u66ff\u6362\u6389\u57fa\u7c7b\uff0c\u4e14\u8f6f\u4ef6\u5355\u4f4d\u7684\u529f\u80fd\u4e0d\u53d7\u5230\u5f71\u54cd\u65f6\uff0c\u57fa\u7c7b\u624d\u80fd\u771f\u6b63\u88ab\u590d\u7528\uff0c\u800c\u6d3e\u751f\u7c7b\u4e5f\u80fd\u591f\u5728\u57fa\u7c7b\u7684\u57fa\u7840\u4e0a\u589e\u52a0\u65b0\u7684\u884c\u4e3a\u3002\u91cc\u6c0f\u4ee3\u6362\u539f\u5219\u662f\u5bf9\u5f00\u95ed\u539f\u5219\u7684\u8865\u5145\u3002\u5b9e\u73b0\u5f00\u95ed\u539f\u5219\u7684\u5173\u952e\u6b65\u9aa4\u5c31\u662f\u62bd\u8c61\u5316\uff0c\u800c\u57fa\u7c7b\u4e0e\u5b50\u7c7b\u7684\u7ee7\u627f\u5173\u7cfb\u5c31\u662f\u62bd\u8c61\u5316\u7684\u5177\u4f53\u5b9e\u73b0\uff0c\u6240\u4ee5\u91cc\u6c0f\u4ee3\u6362\u539f\u5219\u662f\u5bf9\u5b9e\u73b0\u62bd\u8c61\u5316\u7684\u5177\u4f53\u6b65\u9aa4\u7684\u89c4\u8303\u3002<\/p>\n\n\n\n<p><strong>3\u3001\u4f9d\u8d56\u5012\u8f6c\u539f\u5219\uff08Dependence Inversion Principle\uff09<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e2a\u539f\u5219\u662f\u5f00\u95ed\u539f\u5219\u7684\u57fa\u7840\uff0c\u5177\u4f53\u5185\u5bb9\uff1a\u9488\u5bf9\u63a5\u53e3\u7f16\u7a0b\uff0c\u4f9d\u8d56\u4e8e\u62bd\u8c61\u800c\u4e0d\u4f9d\u8d56\u4e8e\u5177\u4f53\u3002<\/p>\n\n\n\n<p><strong>4\u3001\u63a5\u53e3\u9694\u79bb\u539f\u5219\uff08Interface Segregation Principle\uff09<\/strong><\/p>\n\n\n\n<p>\u8fd9\u4e2a\u539f\u5219\u7684\u610f\u601d\u662f\uff1a\u4f7f\u7528\u591a\u4e2a\u9694\u79bb\u7684\u63a5\u53e3\uff0c\u6bd4\u4f7f\u7528\u5355\u4e2a\u63a5\u53e3\u8981\u597d\u3002\u5b83\u8fd8\u6709\u53e6\u5916\u4e00\u4e2a\u610f\u601d\u662f\uff1a\u964d\u4f4e\u7c7b\u4e4b\u95f4\u7684\u8026\u5408\u5ea6\u3002\u7531\u6b64\u53ef\u89c1\uff0c\u5176\u5b9e\u8bbe\u8ba1\u6a21\u5f0f\u5c31\u662f\u4ece\u5927\u578b\u8f6f\u4ef6\u67b6\u6784\u51fa\u53d1\u3001\u4fbf\u4e8e\u5347\u7ea7\u548c\u7ef4\u62a4\u7684\u8f6f\u4ef6\u8bbe\u8ba1\u601d\u60f3\uff0c\u5b83\u5f3a\u8c03\u964d\u4f4e\u4f9d\u8d56\uff0c\u964d\u4f4e\u8026\u5408\u3002<\/p>\n\n\n\n<p><strong>5\u3001\u8fea\u7c73\u7279\u6cd5\u5219\uff0c\u53c8\u79f0\u6700\u5c11\u77e5\u9053\u539f\u5219\uff08Demeter Principle\uff09<\/strong><\/p>\n\n\n\n<p>\u6700\u5c11\u77e5\u9053\u539f\u5219\u662f\u6307\uff1a\u4e00\u4e2a\u5b9e\u4f53\u5e94\u5f53\u5c3d\u91cf\u5c11\u5730\u4e0e\u5176\u4ed6\u5b9e\u4f53\u4e4b\u95f4\u53d1\u751f\u76f8\u4e92\u4f5c\u7528\uff0c\u4f7f\u5f97\u7cfb\u7edf\u529f\u80fd\u6a21\u5757\u76f8\u5bf9\u72ec\u7acb\u3002<\/p>\n\n\n\n<p><strong>6\u3001\u5408\u6210\u590d\u7528\u539f\u5219\uff08Composite Reuse Principle\uff09<\/strong><\/p>\n\n\n\n<p>\u5408\u6210\u590d\u7528\u539f\u5219\u662f\u6307\uff1a\u5c3d\u91cf\u4f7f\u7528\u5408\u6210\/\u805a\u5408\u7684\u65b9\u5f0f\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u7ee7\u627f\u3002<\/p>\n\n\n\n<p><strong>7\u3001\u5355\u4e00\u804c\u8d23\u539f\u5219( Single Responsibility Principle)<\/strong><\/p>\n\n\n\n<p>\u4e00\u4e2a\u7c7b\u88ab\u6539\u53d8\u7684\u539f\u56e0\u4e0d\u80fd\u8d85\u8fc7\u4e00\u4e2a\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u804c\u8d23\uff0c\u5982\u679c\u804c\u8d23\u8fc7\u591a\uff0c\u4ee3\u7801\u5c31\u4f1a\u81c3\u80bf\uff0c\u53ef\u8bfb\u6027\u66f4\u5dee\uff0c\u4e5f\u66f4\u96be\u4ee5\u7ef4\u62a4\u3002\u5176\u5b9e\u4e0a\u5355\u4e00\u804c\u8d23\u539f\u5219\u548c\u63a5\u53e3\u9694\u79bb\u539f\u5219\u6709\u4e00\u5b9a\u7684\u5173\u7cfb\uff0c\u63a5\u53e3\u9694\u79bb\u4ee5\u540e\uff0c\u804c\u8d23\u5c31\u5355\u4e00\u4e86\uff0c\u5b9e\u73b0\u8fd9\u4e2a\u63a5\u53e3\u7684\u7c7b\u7684\u804c\u8d23\u81ea\u7136\u4e5f\u5c31\u5355\u4e00\u4e86\u3002\u4f46\u662f\u63a5\u53e3\u9694\u79bb\u5173\u6ce8\u7684\u662f\u62bd\u8c61\u5c42\uff0c\u5355\u4e00\u804c\u8d23\u5173\u6ce8\u7684\u662f\u4e24\u8005\u517c\u800c\u6709\u4e4b\uff0c\u504f\u91cd\u4e8e\u5b9e\u73b0\u3002<\/p>\n\n\n\n<h2 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