{"id":1970,"date":"2026-03-21T17:55:34","date_gmt":"2026-03-21T17:55:34","guid":{"rendered":"https:\/\/www.tech-posts.com\/cn\/legacy-system-modernization-data-flow-diagrams\/"},"modified":"2026-03-21T17:55:34","modified_gmt":"2026-03-21T17:55:34","slug":"legacy-system-modernization-data-flow-diagrams","status":"publish","type":"post","link":"https:\/\/www.tech-posts.com\/cn\/legacy-system-modernization-data-flow-diagrams\/","title":{"rendered":"DFD\u6307\u5357\uff1a\u4f7f\u7528\u6570\u636e\u6d41\u56fe\u8fdb\u884c\u9057\u7559\u7cfb\u7edf\u73b0\u4ee3\u5316\u7b56\u7565"},"content":{"rendered":"<p>\u7ec4\u7ec7\u5e38\u5e38\u53d1\u73b0\u81ea\u5df1\u5728\u7ef4\u62a4\u9648\u65e7\u7684\u57fa\u7840\u8bbe\u65bd\uff0c\u8fd9\u963b\u788d\u4e86\u654f\u6377\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002\u968f\u7740\u4e1a\u52a1\u9700\u6c42\u7684\u6f14\u53d8\uff0c\u5e95\u5c42\u6280\u672f\u5fc5\u987b\u968f\u4e4b\u9002\u5e94\u3002\u9057\u7559\u7cfb\u7edf\u73b0\u4ee3\u5316\u662f\u4e00\u9879\u5173\u952e\u4efb\u52a1\uff0c\u6d89\u53ca\u66ff\u6362\u8fc7\u65f6\u7684\u7ec4\u4ef6\uff0c\u540c\u65f6\u4fdd\u7559\u4e1a\u52a1\u903b\u8f91\u548c\u6570\u636e\u5b8c\u6574\u6027\u3002\u5728\u8fd9\u4e00\u590d\u6742\u8f6c\u578b\u8fc7\u7a0b\u4e2d\uff0c\u6700\u6709\u6548\u7684\u5de5\u5177\u4e4b\u4e00\u5c31\u662f\u6570\u636e\u6d41\u56fe\uff08DFD\uff09\u3002\u672c\u6307\u5357\u63a2\u8ba8\u5982\u4f55\u5229\u7528DFD\u6765\u7cbe\u786e\u800c\u6e05\u6670\u5730\u6784\u5efa\u3001\u5206\u6790\u548c\u6267\u884c\u73b0\u4ee3\u5316\u7b56\u7565\u3002<\/p>\n<p>\u73b0\u4ee3\u5316\u4e00\u4e2a\u7cfb\u7edf\u4e0d\u4ec5\u4ec5\u662f\u66ff\u6362\u4ee3\u7801\uff1b\u5b83\u5173\u4e4e\u7406\u89e3\u6570\u636e\u5728\u73af\u5883\u4e2d\u5982\u4f55\u6d41\u52a8\u3001\u8f6c\u6362\u548c\u5b58\u50a8\u3002\u901a\u8fc7\u53ef\u89c6\u5316\u8fd9\u4e9b\u6d41\u52a8\uff0c\u56e2\u961f\u53ef\u4ee5\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u51fa\u73b0\u95ee\u9898\u4e4b\u524d\u8bc6\u522b\u51fa\u4f4e\u6548\u4e4b\u5904\u3001\u9690\u85cf\u7684\u4f9d\u8d56\u5173\u7cfb\u548c\u98ce\u9669\u3002\u8fd9\u79cd\u65b9\u6cd5\u786e\u4fdd\u4e86\u6709\u6761\u4e0d\u7d0a\u7684\u8fc7\u6e21\uff0c\u800c\u975e\u6df7\u4e71\u7684\u91cd\u5199\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Cartoon infographic illustrating legacy system modernization strategies using Data Flow Diagrams: shows DFD core components (external entities, processes, data stores, data flows), pre-migration analysis steps, four modernization patterns comparison (rehosting, refactoring, strangler fig, replacement), Strangler Fig implementation workflow, common pitfalls with mitigation tips, and six best practices for successful system transformation\" decoding=\"async\" src=\"https:\/\/www.tech-posts.com\/wp-content\/uploads\/2026\/03\/legacy-system-modernization-dfd-infographic-cartoon.jpg\"\/><\/figure>\n<\/div>\n<h2>\u5728\u9057\u7559\u7cfb\u7edf\u80cc\u666f\u4e0b\u7406\u89e3\u6570\u636e\u6d41\u56fe 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cellspacing=\"0\">\n<tr>\n<th>\u7b56\u7565<\/th>\n<th>DFD\u5f71\u54cd<\/th>\n<th>\u6700\u4f73\u4f7f\u7528\u573a\u666f<\/th>\n<th>\u98ce\u9669\u7b49\u7ea7<\/th>\n<\/tr>\n<tr>\n<td><strong>\u91cd\u5efa\uff08\u63d0\u5347\u4e0e\u8fc1\u79fb\uff09<\/strong><\/td>\n<td>\u5bf9\u6d41\u7a0b\u7ed3\u6784\u7684\u6539\u52a8\u6700\u5c0f\u3002<\/td>\n<td>\u5feb\u901f\u8fc1\u79fb\u5230\u4e91\u57fa\u7840\u8bbe\u65bd\u3002<\/td>\n<td>\u4f4e<\/td>\n<\/tr>\n<tr>\n<td><strong>\u91cd\u6784<\/strong><\/td>\n<td>\u5185\u90e8\u5904\u7406\u8282\u70b9\u7684\u4f18\u5316\u3002<\/td>\n<td>\u5728\u4e0d\u6539\u53d8\u903b\u8f91\u7684\u60c5\u51b5\u4e0b\u63d0\u5347\u6027\u80fd\u3002<\/td>\n<td>\u4e2d\u7b49<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7ede\u6740\u8005\u6a21\u5f0f<\/strong><\/td>\n<td>\u9010\u6b65\u66ff\u6362\u7279\u5b9a\u6d41\u7a0b\u3002<\/td>\n<td>\u590d\u6742\u7cfb\u7edf\uff0c\u65e0\u6cd5\u7acb\u5373\u66ff\u6362\u3002<\/td>\n<td>\u4e2d\u7b49<\/td>\n<\/tr>\n<tr>\n<td><strong>\u66ff\u6362<\/strong><\/td>\n<td>\u5b8c\u5168\u91cd\u65b0\u8bbe\u8ba1\u6d41\u7a0b\u3002<\/td>\n<td>\u8fc7\u65f6\u7684\u903b\u8f91\u5df2\u4e0d\u518d\u6ee1\u8db3\u4e1a\u52a1\u9700\u6c42\u3002<\/td>\n<td>\u9ad8<\/td>\n<\/tr>\n<\/table>\n<h3>\u5b9e\u65bd\u7ede\u6740\u8005\u6995\u6811\u6a21\u5f0f<\/h3>\n<p>\u7ede\u6740\u8005\u6995\u6811\u6a21\u5f0f\u6d89\u53ca\u9010\u6b65\u7528\u65b0\u670d\u52a1\u66ff\u6362\u9057\u7559\u7cfb\u7edf\u4e2d\u7684\u7ec4\u4ef6\u3002\u4f7f\u7528\u6570\u636e\u6d41\u56fe\uff08DFD\uff09\u65f6\uff0c\u8fd9\u79cd\u65b9\u6cd5\u5c24\u5176\u6709\u6548\uff0c\u56e0\u4e3a\u4f60\u53ef\u4ee5\u5c06\u7279\u5b9a\u7684\u6570\u636e\u6d41\u9694\u79bb\u51fa\u6765\u8fdb\u884c\u8fc1\u79fb\u3002<\/p>\n<ol>\n<li><strong>\u8bc6\u522b\u4e00\u4e2a\u5904\u7406\u8282\u70b9\uff1a<\/strong> \u5728\u4e00\u7ea7\u6570\u636e\u6d41\u56fe\u4e2d\u9009\u62e9\u4e00\u4e2a\u7279\u5b9a\u529f\u80fd\u3002<\/li>\n<li><strong>\u521b\u5efa\u4e00\u4e2a\u65b0\u63a5\u53e3\uff1a<\/strong> \u6784\u5efa\u4e00\u4e2a\u5904\u7406\u6b64\u7279\u5b9a\u6570\u636e\u6d41\u7684\u65b0\u670d\u52a1\u3002<\/li>\n<li><strong> \u8def\u7531\u6d41\u91cf\uff1a<\/strong> \u5c06\u8be5\u5904\u7406\u8fc7\u7a0b\u7684\u4f20\u5165\u6570\u636e\u91cd\u5b9a\u5411\u5230\u65b0\u670d\u52a1\u3002<\/li>\n<li><strong>\u505c\u7528\u65e7\u8282\u70b9\uff1a<\/strong> \u786e\u8ba4\u65e0\u8bef\u540e\uff0c\u79fb\u9664\u9057\u7559\u7684\u5904\u7406\u8fc7\u7a0b\u3002<\/li>\n<\/ol>\n<p>\u8be5\u65b9\u6cd5\u901a\u8fc7\u9650\u5236\u4efb\u4f55\u65f6\u523b\u7684\u53d8\u66f4\u8303\u56f4\u6765\u964d\u4f4e\u98ce\u9669\u3002\u5b83\u4f7f\u56e2\u961f\u80fd\u591f\u5728\u8fdb\u5165\u4e0b\u4e00\u4e2a\u6d41\u7a0b\u4e4b\u524d\uff0c\u9a8c\u8bc1\u6bcf\u4e2a\u6570\u636e\u6d41\u7684\u6570\u636e\u5b8c\u6574\u6027\u3002<\/p>\n<h2>\u5c06\u6570\u636e\u6d41\u6620\u5c04\u5230\u65b0\u67b6\u6784 \ud83d\uddfa\ufe0f<\/h2>\n<p>\u73b0\u4ee3\u5316\u8fc7\u7a0b\u4e2d\u6700\u5927\u7684\u6311\u6218\u4e4b\u4e00\u662f\u786e\u4fdd\u6570\u636e\u5728\u8fc1\u79fb\u5230\u65b0\u67b6\u6784\u65f6\u4ecd\u4fdd\u6301\u5176\u542b\u4e49\u548c\u5173\u7cfb\u3002\u5173\u7cfb\u578b\u6570\u636e\u5e93\u901a\u5e38\u4f1a\u8f6c\u5411NoSQL\uff0c\u6216\u8005\u5355\u4f53\u5b58\u50a8\u4f1a\u8f6c\u5411\u5fae\u670d\u52a1\u3002<\/p>\n<h3>\u5904\u7406\u6570\u636e\u5b58\u50a8\u7684\u8f6c\u6362<\/h3>\n<p>\u5728\u9057\u7559\u7684\u6570\u636e\u6d41\u56fe\u4e2d\uff0c\u4e00\u4e2a\u6570\u636e\u5b58\u50a8\u53ef\u80fd\u4ee3\u8868\u4e00\u4e2a\u5927\u578b\u7684\u5355\u4e00\u8868\u683c\u3002\u5728\u73b0\u4ee3\u5fae\u670d\u52a1\u67b6\u6784\u4e2d\uff0c\u8be5\u5b58\u50a8\u53ef\u80fd\u4f1a\u62c6\u5206\u4e3a\u591a\u4e2a\u670d\u52a1\u3002\u6570\u636e\u6d41\u56fe\u5fc5\u987b\u53cd\u6620\u8fd9\u4e00\u53d8\u5316\u3002<\/p>\n<ul>\n<li><strong>\u89c4\u8303\u5316 vs. \u53cd\u89c4\u8303\u5316\uff1a<\/strong> \u9057\u7559\u7cfb\u7edf\u901a\u5e38\u5bf9\u6570\u636e\u8fdb\u884c\u89c4\u8303\u5316\u4ee5\u8282\u7701\u7a7a\u95f4\u3002\u73b0\u4ee3\u7cfb\u7edf\u53ef\u80fd\u4e3a\u4e86\u8bfb\u53d6\u901f\u5ea6\u800c\u53cd\u89c4\u8303\u5316\u3002\u6570\u636e\u6d41\u56fe\u6709\u52a9\u4e8e\u53ef\u89c6\u5316\u8fde\u63a5\u64cd\u4f5c\u53d1\u751f\u7684\u4f4d\u7f6e\uff0c\u4ee5\u53ca\u662f\u5426\u53ef\u4ee5\u907f\u514d\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027\u6a21\u578b\uff1a<\/strong> \u8bc6\u522b\u9700\u8981\u5f3a\u4e00\u81f4\u6027\u4e0e\u53ef\u4ee5\u5bb9\u5fcd\u6700\u7ec8\u4e00\u81f4\u6027\u7684\u6570\u636e\u6d41\u3002<\/li>\n<li><strong>API\u5951\u7ea6\u8bbe\u8ba1\uff1a<\/strong> \u6bcf\u4e2a\u4ece\u5904\u7406\u8fc7\u7a0b\u6d41\u51fa\u7684\u6570\u636e\u6d41\u90fd\u4f1a\u53d8\u6210\u4e00\u4e2aAPI\u8bf7\u6c42\u6216\u54cd\u5e94\u3002\u6570\u636e\u6d41\u56fe\u5b9a\u4e49\u4e86\u8d1f\u8f7d\u7ed3\u6784\u3002<\/li>\n<\/ul>\n<h3>\u6570\u636e\u8840\u7f18\u8ffd\u8e2a<\/h3>\n<p>\u5728\u8fc1\u79fb\u8fc7\u7a0b\u4e2d\uff0c\u5fc5\u987b\u8ffd\u8e2a\u6570\u636e\u7684\u6765\u6e90\u548c\u6700\u7ec8\u53bb\u5411\u3002\u4e00\u4e2a\u5168\u9762\u7684\u6570\u636e\u6d41\u56fe\u53ef\u4f5c\u4e3a\u6570\u636e\u8840\u7f18\u56fe\u3002\u5f53\u5f15\u5165\u65b0\u7684\u6570\u636e\u6d41\u65f6\uff0c\u5e94\u8ffd\u6eaf\u5176\u6e90\u5934\uff0c\u4ee5\u786e\u4fdd\u6ca1\u6709\u6570\u636e\u4e22\u5931\u6216\u635f\u574f\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u4e00\u4e2a\u9057\u7559\u7684\u62a5\u8868\u751f\u6210\u8fc7\u7a0b\u4ece\u4e94\u4e2a\u4e0d\u540c\u7684\u8868\u4e2d\u63d0\u53d6\u6570\u636e\uff0c\u90a3\u4e48\u73b0\u4ee3\u5316\u7248\u672c\u5fc5\u987b\u786e\u4fdd\u65b0\u7684API\u8c03\u7528\u80fd\u591f\u805a\u5408\u76f8\u540c\u7684\u4fe1\u606f\u3002\u6570\u636e\u6d41\u56fe\u786e\u4fdd\u8f93\u51fa\u7684\u903b\u8f91\u7b49\u4ef7\u6027\u3002<\/p>\n<h2>\u5e38\u89c1\u9677\u9631\u4e0e\u98ce\u9669\u7f13\u89e3 \u26a0\ufe0f<\/h2>\n<p>\u5373\u4f7f\u62e5\u6709\u575a\u5b9e\u7684\u6570\u636e\u6d41\u56fe\uff0c\u73b0\u4ee3\u5316\u9879\u76ee\u4ecd\u9762\u4e34\u91cd\u5927\u6311\u6218\u3002\u4e86\u89e3\u5e38\u89c1\u9677\u9631\u6709\u52a9\u4e8e\u56e2\u961f\u6210\u529f\u5e94\u5bf9\u3002<\/p>\n<h3>\u9677\u96311\uff1a\u5ffd\u89c6\u9690\u85cf\u7684\u4f9d\u8d56\u5173\u7cfb<\/h3>\n<p>\u9057\u7559\u7cfb\u7edf\u901a\u5e38\u5b58\u5728\u672a\u8bb0\u5f55\u7684\u4ea4\u4e92\u3002\u67d0\u4e2a\u5904\u7406\u8fc7\u7a0b\u53ef\u80fd\u89e6\u53d1\u4e00\u4e2a\u540e\u53f0\u4efb\u52a1\uff0c\u66f4\u65b0\u4e00\u4e2a\u672a\u5728\u4e3b\u6570\u636e\u6d41\u56fe\u4e2d\u663e\u793a\u7684\u6587\u4ef6\u3002<\/p>\n<ul>\n<li><strong>\u7f13\u89e3\u63aa\u65bd\uff1a<\/strong> \u4f7f\u7528\u4ee3\u7801\u5206\u6790\u548c\u65e5\u5fd7\u8bb0\u5f55\u6765\u53d1\u73b0\u9690\u85cf\u7684\u6570\u636e\u6d41\u3002\u66f4\u65b0\u6570\u636e\u6d41\u56fe\u4ee5\u5305\u542b\u8fd9\u4e9b\u526f\u4f5c\u7528\u3002<\/li>\n<\/ul>\n<h3>\u9677\u96312\uff1a\u8fc7\u5ea6\u4f18\u5316<\/h3>\n<p>\u56e2\u961f\u6709\u65f6\u4f1a\u5728\u8fc1\u79fb\u8fc7\u7a0b\u4e2d\u8bd5\u56fe\u4f18\u5316\u6570\u636e\u6d41\u56fe\u4e2d\u7684\u6bcf\u4e00\u4e2a\u6d41\u7a0b\u3002\u8fd9\u4f1a\u5bfc\u81f4\u8303\u56f4\u8513\u5ef6\u548c\u5ef6\u8fdf\u3002<\/p>\n<ul>\n<li><strong>\u7f13\u89e3\u63aa\u65bd\uff1a<\/strong>\u4e13\u6ce8\u4e8e\u9ad8\u5f71\u54cd\u7684\u6570\u636e\u6d41\u3002\u9664\u975e\u5b58\u5728\u98ce\u9669\uff0c\u5426\u5219\u4fdd\u6301\u4f4e\u6548\u4f46\u7a33\u5b9a\u7684\u6d41\u7a0b\u4e0d\u53d8\u3002<\/li>\n<\/ul>\n<h3>\u9677\u96313\uff1a\u6570\u636e\u540c\u6b65\u95ee\u9898<\/h3>\n<p>\u5728\u9010\u6b65\u66ff\u6362\uff08Strangler Fig\uff09\u5b9e\u65bd\u8fc7\u7a0b\u4e2d\uff0c\u65e7\u7cfb\u7edf\u548c\u65b0\u7cfb\u7edf\u53ef\u80fd\u4f1a\u5e76\u5b58\u3002\u5fc5\u987b\u540c\u6b65\u6570\u636e\u66f4\u65b0\uff0c\u4ee5\u9632\u6b62\u6570\u636e\u504f\u79bb\u3002<\/p>\n<ul>\n<li><strong>\u7f13\u89e3\u63aa\u65bd\uff1a<\/strong>\u5b9e\u65bd\u53cc\u5199\u7b56\u7565\u6216\u4e8b\u4ef6\u9a71\u52a8\u7684\u540c\u6b65\u673a\u5236\u3002\u66f4\u65b0\u6570\u636e\u6d41\u56fe\uff0c\u6e05\u6670\u5730\u5c55\u793a\u540c\u6b65\u8def\u5f84\u3002<\/li>\n<\/ul>\n<h2>\u9a8c\u8bc1\u4e0e\u6d4b\u8bd5\u7b56\u7565 \ud83e\uddea<\/h2>\n<p>\u73b0\u4ee3\u5316\u8fc7\u7a0b\u4e2d\u7684\u6d4b\u8bd5\u4e0d\u4ec5\u4ec5\u662f\u53d1\u73b0\u7f3a\u9677\uff0c\u66f4\u662f\u9a8c\u8bc1\u6570\u636e\u6d41\u662f\u5426\u4e0e\u9057\u7559\u7cfb\u7edf\u7684\u884c\u4e3a\u5b8c\u5168\u4e00\u81f4\u3002<\/p>\n<h3>\u5951\u7ea6\u6d4b\u8bd5<\/h3>\n<p>\u7531\u4e8e\u6570\u636e\u6d41\u4ee3\u8868\u4e86\u5404\u6d41\u7a0b\u4e4b\u95f4\u7684\u5951\u7ea6\uff0c\u56e0\u6b64\u5951\u7ea6\u6d4b\u8bd5\u81f3\u5173\u91cd\u8981\u3002\u81ea\u52a8\u5316\u6d4b\u8bd5\u5e94\u9a8c\u8bc1\u6bcf\u4e2a\u6d41\u7a0b\u8282\u70b9\u7684\u8f93\u5165\u548c\u8f93\u51fa\u662f\u5426\u4e0e\u6570\u636e\u6d41\u56fe\u4e2d\u5b9a\u4e49\u7684\u9884\u671f\u503c\u4e00\u81f4\u3002<\/p>\n<h3>\u7aef\u5230\u7aef\u6d41\u7a0b\u6d4b\u8bd5<\/h3>\n<p>\u4ece\u5916\u90e8\u5b9e\u4f53\u8fd0\u884c\u6574\u4e2a\u6d41\u7a0b\u56fe\u5230\u6570\u636e\u5b58\u50a8\uff0c\u4ee5\u786e\u4fdd\u7aef\u5230\u7aef\u7684\u6d41\u7a0b\u662f\u53ef\u7528\u7684\u3002\u8fd9\u9a8c\u8bc1\u4e86\u670d\u52a1\u4e4b\u95f4\u7684\u96c6\u6210\u70b9\u662f\u5426\u6b63\u786e\u3002<\/p>\n<ul>\n<li><strong>\u8f93\u5165\u9a8c\u8bc1\uff1a<\/strong>\u786e\u4fdd\u5916\u90e8\u5b9e\u4f53\u63d0\u4f9b\u6709\u6548\u6570\u636e\u3002<\/li>\n<li><strong>\u5904\u7406\u903b\u8f91\uff1a<\/strong>\u9a8c\u8bc1\u8f6c\u6362\u662f\u5426\u51c6\u786e\u3002<\/li>\n<li><strong>\u8f93\u51fa\u4e00\u81f4\u6027\uff1a<\/strong>\u786e\u8ba4\u6700\u7ec8\u7ed3\u679c\u4e0e\u9057\u7559\u7cfb\u7edf\u7684\u8f93\u51fa\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<h2>\u8fc7\u6e21\u671f\u95f4\u7684\u6280\u672f\u503a\u52a1\u7ba1\u7406 \u2696\ufe0f<\/h2>\n<p>\u9057\u7559\u7cfb\u7edf\u4f1a\u968f\u7740\u65f6\u95f4\u79ef\u7d2f\u6280\u672f\u503a\u52a1\u3002\u73b0\u4ee3\u5316\u662f\u4e00\u4e2a\u507f\u8fd8\u503a\u52a1\u7684\u673a\u4f1a\uff0c\u4f46\u5fc5\u987b\u6709\u7b56\u7565\u5730\u8fdb\u884c\u3002<\/p>\n<h3>\u901a\u8fc7\u6570\u636e\u6d41\u56fe\u8bc6\u522b\u503a\u52a1<\/h3>\n<p>\u5bfb\u627e\uff1a<\/p>\n<ul>\n<li><strong>\u6df7\u4e71\u7684\u6570\u636e\u6d41\uff1a<\/strong>\u5177\u6709\u8fc7\u591a\u8f93\u5165\u548c\u8f93\u51fa\u8fde\u63a5\u7684\u6d41\u7a0b\u3002<\/li>\n<li><strong>\u624b\u52a8\u6b65\u9aa4\uff1a<\/strong>\u9700\u8981\u4eba\u5de5\u5e72\u9884\u7684\u6d41\u7a0b\uff08\u901a\u5e38\u4ee5\u5916\u90e8\u5b9e\u4f53\u5145\u5f53\u6d41\u7a0b\u7684\u5f62\u5f0f\u8868\u793a\uff09\u3002<\/li>\n<li><strong>\u6570\u636e\u5197\u4f59\uff1a<\/strong> \u591a\u4e2a\u5b58\u50a8\u5e93\u4fdd\u5b58\u76f8\u540c\u7684\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<p> 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