{"id":1904,"date":"2026-08-04T16:41:15","date_gmt":"2026-08-04T16:41:15","guid":{"rendered":"https:\/\/www.vpascode.com\/tw\/complete-guide-to-plantuml-sequence-diagrams-syntax-examples-best-practices-2\/"},"modified":"2026-08-04T16:41:15","modified_gmt":"2026-08-04T16:41:15","slug":"complete-guide-to-plantuml-sequence-diagrams-syntax-examples-best-practices-2","status":"publish","type":"post","link":"https:\/\/www.vpascode.com\/tw\/complete-guide-to-plantuml-sequence-diagrams-syntax-examples-best-practices-2\/","title":{"rendered":"PlantUML\u5e8f\u5217\u5716\u7684\u5b8c\u6574\u6307\u5357\uff1a\u8a9e\u6cd5\u3001\u7bc4\u4f8b\u8207\u6700\u4f73\u5be6\u52d9"},"content":{"rendered":"<p><!-- Meta Title: PlantUML Sequence Diagrams: Complete Guide & Editor Meta Description: Learn PlantUML sequence diagram syntax, real-world examples, and best practices. Start building diagrams instantly with a free sequence diagram editor. SEO Friendly Slug: what-is-plantuml-sequence-diagram-guide --><\/p>\n<p>\u4e00\u500b<strong>PlantUML\u5e8f\u5217\u5716<\/strong>\u662f\u4ee5\u6587\u5b57\u70ba\u57fa\u790e\u7684\u8edf\u9ad4\u7cfb\u7d71\u4e2d\u7269\u4ef6\u6216\u7a0b\u5e8f\u96a8\u6642\u9593\u4e92\u52d5\u7684\u8868\u793a\u65b9\u5f0f\u3002\u900f\u904e\u4f7f\u7528\u7d14\u6587\u5b57\u7684\u9818\u57df\u7279\u5b9a\u8a9e\u8a00\uff08DSL\uff09\uff0c\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u64b0\u5beb\u81ea\u52d5\u6e32\u67d3\u6210\u6e05\u6670\u8996\u89ba\u8868\u793a\u7684\u5716\u5f62\u7a0b\u5f0f\u78bc\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u76f4\u89ba\u5f0f\u7684<strong>\u5e8f\u5217\u5716\u7de8\u8f2f\u5668<\/strong>\u6216\u662f\u4e00\u500b\u5f48\u6027\u7684<strong>PlantUML\u7de8\u8f2f\u5668<\/strong>\u4f86\u8a2d\u8a08\u3001\u6587\u4ef6\u5316\u548c\u5206\u4eab\u7cfb\u7d71\u67b6\u69cb\uff0c\u4e86\u89e3PlantUML\u8a9e\u6cd5\u662f\u63d0\u5347\u6280\u8853\u6587\u4ef6\u5de5\u4f5c\u6d41\u7a0b\u7684\u6700\u5feb\u65b9\u6cd5\u4e4b\u4e00\u3002<\/p>\n<p><img fetchpriority=\"high\" alt=\"Illustrated guide banner showing a PlantUML sequence diagram code on the left transforming into a clean rendered visual workflow on the right.\" class=\"alignnone size-full wp-image-1815\" decoding=\"async\" fetchpriority=\"high\" height=\"816\" sizes=\"(max-width: 1312px) 100vw, 1312px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/plantuml-sequence-diagram-guide-hero-banner.jpg\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/plantuml-sequence-diagram-guide-hero-banner.jpg 1312w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/plantuml-sequence-diagram-guide-hero-banner-300x187.jpg 300w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/plantuml-sequence-diagram-guide-hero-banner-1024x637.jpg 1024w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/plantuml-sequence-diagram-guide-hero-banner-768x478.jpg 768w\" width=\"1312\"\/><\/p>\n<hr\/>\n<h2>\u4ec0\u9ebc\u662fPlantUML\u5e8f\u5217\u5716\uff1f\uff08\u4ee5\u53ca\u70ba\u4ec0\u9ebc\u8981\u4f7f\u7528\u7a0b\u5f0f\u78bc\u7e6a\u5716\uff09<\/h2>\n<p>PlantUML\u5e8f\u5217\u5716\u6703\u5728\u7279\u5b9a\u57f7\u884c\u60c5\u5883\u4e0b\uff0c\u8aaa\u660e\u7cfb\u7d71\u4e2d\u53c3\u8207\u8005\u4e4b\u9593\u9010\u6b65\u50b3\u905e\u8a0a\u606f\u7684\u904e\u7a0b\u3002\u8207\u50b3\u7d71\u7684\u62d6\u66f3\u5f0f\u8a2d\u8a08\u5de5\u5177\u4e0d\u540c\uff0cPlantUML\u9075\u5faa<strong>\u7a0b\u5f0f\u78bc\u7e6a\u5716<\/strong>\u7684\u6a21\u5f0f\uff0c\u8b93\u8edf\u9ad4\u67b6\u69cb\u5e2b\u8207\u5de5\u7a0b\u5e2b\u53ef\u4ee5\u64b0\u5beb\u6613\u8b80\u7684\u6307\u4ee4\u78bc\u6a94\u6848\uff08\u4f8b\u5982<code>.puml<\/code>\uff09\uff0c\u9019\u4e9b\u6a94\u6848\u80fd\u81ea\u52d5\u8f49\u63db\u70ba\u5716\u5f62\u3002<\/p>\n<h3>\u4e3b\u8981\u512a\u52e2\uff1a\u7248\u672c\u63a7\u5236\u3001\u901f\u5ea6\u8207\u4e00\u81f4\u6027<\/h3>\n<ul>\n<li><strong>\u652f\u63f4\u7248\u672c\u63a7\u5236\uff1a<\/strong>\u7531\u65bc\u5716\u5f62\u4ee5\u7d14\u6587\u5b57\u5f62\u5f0f\u5b58\u5728\uff0c\u56e0\u6b64\u53ef\u4ee5\u5132\u5b58\u5728Git\u5009\u5eab\u4e2d\uff0c\u8207\u61c9\u7528\u7a0b\u5f0f\u78bc\u4e00\u8d77\u9032\u884c\u5dee\u7570\u6bd4\u5c0d\u8207\u5408\u4f75\u3002<\/li>\n<li><strong>\u7dad\u8b77\u901f\u5ea6\uff1a<\/strong>\u66f4\u65b0\u5de5\u4f5c\u6d41\u7a0b\u50c5\u9700\u5e7e\u79d2\u9418\u2014\u2014\u53ea\u9700\u7de8\u8f2f\u4e00\u884c\u6587\u5b57\uff0c\u7121\u9700\u624b\u52d5\u79fb\u52d5\u65b9\u6846\u6216\u91cd\u65b0\u9023\u63a5\u7bad\u982d\u3002<\/li>\n<li><strong>\u8996\u89ba\u4e00\u81f4\u6027\uff1a<\/strong>\u6e32\u67d3\u5de5\u5177\u6703\u81ea\u52d5\u8a08\u7b97\u4f48\u5c40\u3001\u5c0d\u9f4a\u8207\u9593\u8ddd\uff0c\u78ba\u4fdd\u5718\u968a\u6240\u6709\u6587\u4ef6\u7684\u6a23\u5f0f\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<hr\/>\n<h2>\u6838\u5fc3\u8a9e\u6cd5\u57fa\u790e\uff1a\u5982\u4f55\u5efa\u7acb\u60a8\u7684\u7b2c\u4e00\u500b\u5e8f\u5217\u5716<\/h2>\n<p>PlantUML\u4f7f\u7528\u7c21\u55ae\u4e14\u6613\u8b80\u7684\u95dc\u9375\u5b57\u4f86\u5b9a\u7fa9\u7cfb\u7d71\u5be6\u9ad4\u8207\u4e92\u52d5\u8def\u5f91\u3002<\/p>\n<h3>\u5ba3\u544a\u53c3\u8207\u8005\u3001\u89d2\u8272\u8207\u908a\u754c<\/h3>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u7b26\u5408\u7cfb\u7d71\u67b6\u69cb\u4e2d\u89d2\u8272\u7684\u95dc\u9375\u5b57\uff0c\u660e\u78ba\u5ba3\u544a\u53c3\u8207\u8005\uff1a<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Plantuml<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/#plantuml:DO_12eCm44JlWVp3adlnxg6e5OfGg6qgFMzYAA5gGhAs-FUDOc-p-nuCKqJ2GFCuS8QQN80kci2PJq-hhSU9G9Hj0sSayyL50CP_vgn7GeNHW6XTf5SmydRPZBhYJBbvwZ4i89v6GUdzHhg6CyxM4ZWSqvN3QR3w7K7EQhIKKBE2lIA7zYeVaA6tMTo57QrMNUKWyMFWRhGBFMU5cVgqvGS0\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728VPasCode\u4e2d\u7de8\u8f2fPlantuml<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:SoWkIImgAStDuULAJ2x9Br9uidV_yoahNZIqyd8L06KoapCB4lDA59GS0pnVJflnid6oaa9YiSBpRPjUJf_3ovMIM9AOb5YSgg0Ka5zSabwK6Xpe0rRmOdFxisapd-vQpSkLb5-Qbv9OLAcW59wQzAoz4sZyynNTJ_VqWnM6Ul9oyNB1RLNGjGCAMIcyt3tlsUIkP_qJdknQmiiLwWaIXrXgfH3W7noYe9zOaAaFauV8WDJ0xRLIUDgowUdQ6IzMp7ZPqyBBvP2QbmBq9W00\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"language-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">@startuml\r\nactor \u4f7f\u7528\u8005\r\nparticipant \"API\u9598\u9053\" as \u7db2\u95dc\r\ndatabase \"PostgreSQL\" as \u8cc7\u6599\u5eab\r\nboundary \"Web\u61c9\u7528\u7a0b\u5f0f\" as UI\r\n\r\n\u4f7f\u7528\u8005 -&gt; UI: \u9ede\u64ca\u63d0\u4ea4\r\nUI -&gt; \u7db2\u95dc: POST \/api\/\u63d0\u4ea4\r\n\u7db2\u95dc -&gt; \u8cc7\u6599\u5eab: \u5132\u5b58\u8a18\u9304\r\n@enduml<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:SoWkIImgAStDuULAJ2x9Br9uidV_yoahNZIqyd8L06KoapCB4lDA59GS0pnVJflnid6oaa9YiSBpRPjUJf_3ovMIM9AOb5YSgg0Ka5zSabwK6Xpe0rRmOdFxisapd-vQpSkLb5-Qbv9OLAcW59wQzAoz4sZyynNTJ_VqWnM6Ul9oyNB1RLNGjGCAMIcyt3tlsUIkP_qJdknQmiiLwWaIXrXgfH3W7noYe9zOaAaFauV8WDJ0xRLIUDgowUdQ6IzMp7ZPqyBBvP2QbmBq9W00\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/#plantuml:DO_12eCm44JlWVp3adlnxg6e5OfGg6qgFMzYAA5gGhAs-FUDOc-p-nuCKqJ2GFCuS8QQN80kci2PJq-hhSU9G9Hj0sSayyL50CP_vgn7GeNHW6XTf5SmydRPZBhYJBbvwZ4i89v6GUdzHhg6CyxM4ZWSqvN3QR3w7K7EQhIKKBE2lIA7zYeVaA6tMTo57QrMNUKWyMFWRhGBFMU5cVgqvGS0\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728VPasCode\u4e2d\u7de8\u8f2fPlantuml<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<h3>\u8a0a\u606f\u8207\u7bad\u982d\uff1a\u540c\u6b65\u8207\u975e\u540c\u6b65\u547c\u53eb<\/h3>\n<p>\u7bad\u982d\u7684\u65b9\u5411\u548c\u5916\u89c0\u8868\u793a\u7d44\u4ef6\u4e4b\u9593\u901a\u8a0a\u7684\u6d41\u5411\uff1a<\/p>\n<p>\u00a0<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8a9e\u6cd5<\/th>\n<th>\u8996\u89ba\u8f38\u51fa<\/th>\n<th>\u901a\u8a0a\u985e\u578b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code>A -&gt; B<\/code><\/td>\n<td>\u5be6\u5fc3\u7bad\u982d\u642d\u914d\u5be6\u5fc3\u7bad\u982d\u982d<\/td>\n<td>\u540c\u6b65\u8a0a\u606f\u547c\u53eb<\/td>\n<\/tr>\n<tr>\n<td><code>A --&gt; B<\/code><\/td>\n<td>\u865b\u7dda\u7bad\u982d\u642d\u914d\u5be6\u5fc3\u7bad\u982d\u982d<\/td>\n<td>\u56de\u61c9 \/ \u56de\u50b3\u8a0a\u606f<\/td>\n<\/tr>\n<tr>\n<td><code>A -&gt;&gt; B<\/code><\/td>\n<td>\u5be6\u5fc3\u7bad\u982d\u642d\u914d\u958b\u53e3\u7bad\u982d\u982d<\/td>\n<td>\u975e\u540c\u6b65\u8a0a\u606f\u547c\u53eb<\/td>\n<\/tr>\n<tr>\n<td><code>A - B<\/code><\/td>\n<td>\u534a\u982d\u7bad\u982d<\/td>\n<td>\u55ae\u5411 \/ \u4e8b\u4ef6\u8a0a\u606f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr\/>\n<h2>\u73fe\u5be6\u4e16\u754c\u4e2d\u7684 PlantUML \u5e8f\u5217\u5716\u7bc4\u4f8b<\/h2>\n<p>\u8907\u88fd\u4e26\u8abf\u6574\u9019\u4e9b\u5e38\u898b\u7684\u67b6\u69cb\u6a21\u5f0f\uff0c\u61c9\u7528\u65bc\u60a8\u7684\u6280\u8853\u6587\u4ef6\u4e2d\u3002<\/p>\n<h3>\u7bc4\u4f8b 1\uff1a\u4f7f\u7528\u8005\u9a57\u8b49\u8207 JWT \u6191\u8b49\u6d41\u7a0b<\/h3>\n<p><img alt=\"Sequence diagram example 'User Authentication &amp; JWT Token Flow'\" class=\"alignnone wp-image-1839 size-full\" decoding=\"async\" height=\"745\" sizes=\"(max-width: 1192px) 100vw, 1192px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a7214a2d6f33.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a7214a2d6f33.png 1192w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a7214a2d6f33-300x188.png 300w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a7214a2d6f33-1024x640.png 1024w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a7214a2d6f33-768x480.png 768w\" width=\"1192\"\/><\/p>\n<p>\u5c0d\u61c9\u7684 PlantUML \u7a0b\u5f0f\u78bc\uff1a<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">PlantUML<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/#plantuml:ZL6xJiCm5Dqj-H-ECfMXQa1C6L2RPW660arXTfqhQk7QbH-HuEkvIIgW6vxiw_Eqbp6faFBHIg5oyYuVznHuhvCFM5j3BabnOeZHvgHSGh7AwO0jXTveAg0YXe4KdKfghoAXs4KAQCx74T7KKaWngM5-Dp8gF6ssBHRMlnk7cGxKyQrHDbwDzgPNYSxQeoNpchh2SwRmYJnu1D8-T7_GWqzJO_vZyK8f1pUXXu0SaoxGJBO9hygQ3klV25A0rsJBObFo2ZTbYSqZPWzlBLPQKune_GSvJaoMgz-x_fzAj-KrTevV_E23-I8kGQwxI3SrN_AOF-SR\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7de8\u8f2f PlantUML<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:SoWkIImgAStDuULAB2t9polDJKej0hAJI_AB59wkM_IiOzlprUjvkGg0gZAJCmiIyqeKb5wkdFvYRUUpERrFksSgAIGMApYMbcJmSgKabYGc9HQdAYWzsRl_-PGLBnfQNsnkVpPjvjDTgy7AN9nukNYvuAOgwDg1TLef1FW7XoZev-IdP-OfQ3nhcmWqNHFiYCoon99KgF4W4gJ5nSbAuTdyfIzMBa9OisB6ovuM91qWcroS57JXDZoTFUzfqsOqTm6Td8gY1MX2Jed2qmaTppPFXJY3bqi1221M0ms3kzrAmSZ0GC7VMq73Apn4uUdQ6K_xfy4Tdfe338INS-SHOOg9WQ72ipchdlLrF5lJ1TIPbuBYA8ZF7O32m2W20000\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"language-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">@startuml\r\nautonumber\r\nactor \u5ba2\u6236\u7aef\r\nparticipant \"\u9a57\u8b49\u670d\u52d9\" as Auth\r\ndatabase \"\u4f7f\u7528\u8005\u8cc7\u6599\u5eab\" as DB\r\n\r\n\u5ba2\u6236\u7aef -&gt; Auth: POST \/login (\u6191\u8b49)\r\nactivate Auth\r\nAuth -&gt; DB: \u67e5\u8a62\u4f7f\u7528\u8005\u8a18\u9304\r\nactivate DB\r\nDB --&gt; Auth: \u56de\u50b3\u4f7f\u7528\u8005\u8cc7\u6599\r\ndeactivate DB\r\n\r\nalt \u5408\u6cd5\u6191\u8b49\r\n    Auth --&gt; \u5ba2\u6236\u7aef: 200 OK (JWT \u5b58\u53d6\u6191\u8b49)\r\nelse \u975e\u6cd5\u6191\u8b49\r\n    Auth --&gt; \u5ba2\u6236\u7aef: 401 \u672a\u6388\u6b0a\r\nend\r\ndeactivate Auth\r\n@enduml\r\n<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:SoWkIImgAStDuULAB2t9polDJKej0hAJI_AB59wkM_IiOzlprUjvkGg0gZAJCmiIyqeKb5wkdFvYRUUpERrFksSgAIGMApYMbcJmSgKabYGc9HQdAYWzsRl_-PGLBnfQNsnkVpPjvjDTgy7AN9nukNYvuAOgwDg1TLef1FW7XoZev-IdP-OfQ3nhcmWqNHFiYCoon99KgF4W4gJ5nSbAuTdyfIzMBa9OisB6ovuM91qWcroS57JXDZoTFUzfqsOqTm6Td8gY1MX2Jed2qmaTppPFXJY3bqi1221M0ms3kzrAmSZ0GC7VMq73Apn4uUdQ6K_xfy4Tdfe338INS-SHOOg9WQ72ipchdlLrF5lJ1TIPbuBYA8ZF7O32m2W20000\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/#plantuml:ZL6xJiCm5Dqj-H-ECfMXQa1C6L2RPW660arXTfqhQk7QbH-HuEkvIIgW6vxiw_Eqbp6faFBHIg5oyYuVznHuhvCFM5j3BabnOeZHvgHSGh7AwO0jXTveAg0YXe4KdKfghoAXs4KAQCx74T7KKaWngM5-Dp8gF6ssBHRMlnk7cGxKyQrHDbwDzgPNYSxQeoNpchh2SwRmYJnu1D8-T7_GWqzJO_vZyK8f1pUXXu0SaoxGJBO9hygQ3klV25A0rsJBObFo2ZTbYSqZPWzlBLPQKune_GSvJaoMgz-x_fzAj-KrTevV_E23-I8kGQwxI3SrN_AOF-SR\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7de8\u8f2f PlantUML<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<h3>\u7bc4\u4f8b 2\uff1a\u96fb\u5b50\u5546\u52d9\u4ed8\u6b3e\u7db2\u95dc\u6574\u5408<\/h3>\n<p id=\"lYxOGZN\"><img alt=\"Sequence diagram example: 'E-Commerce Payment Gateway Integration'\" class=\"alignnone wp-image-1840 size-full\" decoding=\"async\" height=\"745\" sizes=\"(max-width: 1192px) 100vw, 1192px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a721507ddca4.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a721507ddca4.png 1192w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a721507ddca4-300x188.png 300w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a721507ddca4-1024x640.png 1024w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/08\/img_6a721507ddca4-768x480.png 768w\" width=\"1192\"\/><\/p>\n<p>\u5c0d\u61c9\u7684 PlantUML \u7a0b\u5f0f\u78bc\uff1a<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">PlantUML<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/#plantuml:PL512i8m4Bm7yeT5FEYX7-X12Zr8JnQA3mZ9QeEsAPkqukzTsmHBFIMxCpipcnG-A0fZzvH2wU08oj47ro59CJ1WjHrK7s1NjgWVRWnmhNQWF1yRmeKC4ZH8azKuK-REXbMhTuTyEQk0B_MUUR4dXHJ97B8JE-HGklvcgKjIr-eBp0LZX2oI80vlfrMzn65sLC-X9gVHUoXRHNU4m_wucbfbI16pdrLgDQFMY0QD50R_PwDdpBvKSOFDo6eVPgUjSsXQzuAgdno_8UlUKOe2UyFVym40\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7de8\u8f2f PlantUML<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:SoWkIImgAStDuULAJ2x9Br9ukcxHiuvjl5m5GE7CvCo2nBmI1QNdMoSytR7voUxkbtCNAIaa5Yk4UgAfUB6YwUcqTS_cz3xjdWbMuL-Kabg4fkZ9xXdFrknxlctJo-bpm8e24YjpK_DAUBbukI3sAkZQ0SssKdY-QDUBLRqGGtcvGZr1uc0JhHIUxjxrV7KtJ0hewCoon99Kc7rW2gGQQhILmekPKvzFQ8DOhQ2Xeeca1ybwA5D15s4HHCkpZWbFk-RpSgMaOcg3MWPrCyH9JxTlWZWUHGlKTI2F05L3_6gby7BX-kTBTZsVkUVvqXKl5pG20vUNoo4rBmKO7G00\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"language-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">@startuml\r\nactor \u5ba2\u6236\r\nparticipant \"\u7d50\u5e33\u4ecb\u9762\" as UI\r\nparticipant \"\u8a02\u55ae\u670d\u52d9\" as Order\r\nparticipant \"\u4ed8\u6b3e\u7db2\u95dc\" as Payment\r\n\r\n\u5ba2\u6236 -&gt; UI: \u78ba\u8a8d\u8a02\u55ae\r\nUI -&gt; Order: \u5efa\u7acb\u8a02\u55ae\r\nactivate Order\r\nOrder -&gt; Payment: \u8655\u7406\u4ed8\u6b3e ($)\r\nactivate Payment\r\n\r\nPayment --&gt; Order: \u4ed8\u6b3e\u6210\u529f\r\ndeactivate Payment\r\nOrder --&gt; UI: \u8a02\u55ae\u5df2\u78ba\u8a8d\r\ndeactivate Order\r\nUI --&gt; \u5ba2\u6236: \u986f\u793a\u767c\u7968\u9801\u9762\r\n@enduml<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:SoWkIImgAStDuULAJ2x9Br9ukcxHiuvjl5m5GE7CvCo2nBmI1QNdMoSytR7voUxkbtCNAIaa5Yk4UgAfUB6YwUcqTS_cz3xjdWbMuL-Kabg4fkZ9xXdFrknxlctJo-bpm8e24YjpK_DAUBbukI3sAkZQ0SssKdY-QDUBLRqGGtcvGZr1uc0JhHIUxjxrV7KtJ0hewCoon99Kc7rW2gGQQhILmekPKvzFQ8DOhQ2Xeeca1ybwA5D15s4HHCkpZWbFk-RpSgMaOcg3MWPrCyH9JxTlWZWUHGlKTI2F05L3_6gby7BX-kTBTZsVkUVvqXKl5pG20vUNoo4rBmKO7G00\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/#plantuml:PL512i8m4Bm7yeT5FEYX7-X12Zr8JnQA3mZ9QeEsAPkqukzTsmHBFIMxCpipcnG-A0fZzvH2wU08oj47ro59CJ1WjHrK7s1NjgWVRWnmhNQWF1yRmeKC4ZH8azKuK-REXbMhTuTyEQk0B_MUUR4dXHJ97B8JE-HGklvcgKjIr-eBp0LZX2oI80vlfrMzn65sLC-X9gVHUoXRHNU4m_wucbfbI16pdrLgDQFMY0QD50R_PwDdpBvKSOFDo6eVPgUjSsXQzuAgdno_8UlUKOe2UyFVym40\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>\u5728 VPasCode \u4e2d\u7de8\u8f2f PlantUML<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<hr\/>\n<h2>\u9032\u968e PlantUML \u529f\u80fd\uff1a\u8ff4\u5708\u3001\u689d\u4ef6\u5224\u65b7\u8207\u7fa4\u7d44<\/h2>\n<p>\u70ba\u4e86\u6e96\u78ba\u6355\u6349\u8907\u96dc\u7684\u5546\u696d\u908f\u8f2f\uff0cPlantUML \u63d0\u4f9b\u5167\u5efa\u7684\u63a7\u5236\u7d50\u69cb\uff0c\u5c07\u5e8f\u5217\u5305\u88dd\u6210\u6e05\u6670\u7684\u8996\u89ba\u6846\u67b6\u3002<\/p>\n<h3>\u4f7f\u7528<code>alt<\/code>, <code>opt<\/code>\uff0c\u4ee5\u53ca<code>loop<\/code>\u5340\u584a<\/h3>\n<ul>\n<li><code>alt \/ else<\/code>\uff1a\u4ee3\u8868\u689d\u4ef6\u5206\u652f\uff08\u985e\u4f3c\u65bc<code>if-else<\/code>\u7d50\u69cb\uff09\u3002<\/li>\n<li><code>opt<\/code>\uff1a\u4ee3\u8868\u50c5\u5728\u689d\u4ef6\u6eff\u8db3\u6642\u624d\u57f7\u884c\u7684\u9078\u64c7\u6027\u6b65\u9a5f\u3002<\/li>\n<li><code>loop<\/code>\uff1a\u4ee3\u8868\u91cd\u8907\u7684\u4e92\u52d5\u6216\u8f2a\u8a62\u4efb\u52d9\u3002<\/li>\n<\/ul>\n<h3>\u555f\u7528\u8207\u505c\u7528\u751f\u547d\u7dda\uff08<code>activate<\/code> \/ <code>deactivate<\/code>)<\/h3>\n<p>\u70ba\u4e86\u6e05\u695a\u986f\u793a\u7d44\u4ef6\u6b63\u5728\u7a4d\u6975\u57f7\u884c\u5de5\u4f5c\u6642\uff0c\u8acb\u4f7f\u7528<code>activate<\/code>\u548c<code>deactivate<\/code>\u8a9e\u53e5\uff0c\u6216\u9644\u52a0<code>++<\/code>\u548c<code>--<\/code> \u7bad\u982d\u76ee\u6a19\u7684\u7c21\u5beb\u3002\u9019\u6703\u5728\u53c3\u8207\u8005\u7684\u751f\u547d\u7dda\u4e0a\u7522\u751f\u5782\u76f4\u7684\u57f7\u884c\u689d\uff0c\u7a81\u51fa\u986f\u793a\u57f7\u884c\u6642\u9593\u548c\u7cfb\u7d71\u8ca0\u8f09\u3002<\/p>\n<hr\/>\n<h2>\u5e38\u898b\u7684 PlantUML \u554f\u984c\uff08\u4ee5\u53ca\u5982\u4f55\u89e3\u6c7a\uff09<\/h2>\n<p>\u96d6\u7136 PlantUML \u529f\u80fd\u5f37\u5927\uff0c\u4f46\u8a2d\u7f6e Java \u548c Graphviz \u7b49\u672c\u5730\u4f9d\u8cf4\u9805\u53ef\u80fd\u6703\u5e36\u4f86\u4e0d\u5fc5\u8981\u7684\u958b\u767c\u8005\u6469\u64e6\u3002<\/p>\n<h3>\u5728\u7121\u9700\u672c\u5730 Java \u8a2d\u5b9a\u7684\u60c5\u6cc1\u4e0b\u4fee\u5fa9 PlantUML \u8a9e\u6cd5\u932f\u8aa4<\/h3>\n<p>\u8a2d\u5b9a\u672c\u5730\u6e32\u67d3\u6d41\u7a0b\u7d93\u5e38\u6703\u5c0e\u81f4\u74b0\u5883\u4e0d\u5339\u914d\u6216\u7f3a\u5c11\u4f9d\u8cf4\u9805\u932f\u8aa4\u3002\u4f7f\u7528\u73fe\u4ee3\u5316\u7684\u7dda\u4e0a<strong>\u514d\u8cbb\u7684\u5e8f\u5217\u5716\u7de8\u8f2f\u5668<\/strong> \u4f8b\u5982<a href=\"https:\/\/vpascode.com\" rel=\"noopener\" target=\"_blank\">VPasCode<\/a> \u5b8c\u5168\u6d88\u9664\u4e86\u74b0\u5883\u8a2d\u5b9a\u3002\u5982\u679c\u9047\u5230\u8a9e\u6cd5\u932f\u8aa4\uff0cVPasCode \u5177\u5099\u5167\u5efa\u7684 AI \u7a0b\u5f0f\u78bc\u932f\u8aa4\u4fee\u5fa9\u529f\u80fd\uff0c\u80fd\u7acb\u5373\u5b9a\u4f4d\u7121\u6548\u7684\u7a0b\u5f0f\u78bc\u884c\u4e26\u81ea\u52d5\u4fee\u6b63\u3002<\/p>\n<h3>\u5c07\u5716\u8868\u532f\u51fa\u4e26\u5d4c\u5165\u6280\u8853\u6587\u4ef6\u4e2d<\/h3>\n<p>\u5728\u6280\u8853\u5718\u968a\u4e4b\u9593\u5206\u4eab\u975c\u614b\u5716\u8868\u7d93\u5e38\u6703\u7834\u58de\u6587\u4ef6\u5de5\u4f5c\u6d41\u7a0b\u3002\u70ba\u4e86\u4fdd\u6301\u6587\u4ef6\u66f4\u65b0\uff0c\u8acb\u5c07\u6e32\u67d3\u5f8c\u7684\u5716\u8868\u532f\u51fa\u70ba\u53ef\u4f38\u7e2e\u5411\u91cf\u5716\u5f62\uff08SVG\uff09\u6216\u9ad8\u89e3\u6790\u5ea6 PNG\u3002\u70ba\u4e86\u66f4\u6df1\u5165\u7684\u6587\u4ef6\u6574\u5408\uff0cVPasCode \u53ef\u76f4\u63a5\u9023\u7d50 Visual Paradigm OpenDocs\uff0c\u8b93\u60a8\u7684\u5716\u8868\u8207\u5c08\u6848\u898f\u683c\u4e00\u540c\u539f\u751f\u4fdd\u7559\u3002<\/p>\n<hr\/>\n<h2>\u4f7f\u7528 VPasCode \u5373\u6642\u6e32\u67d3\u548c\u7de8\u8f2f PlantUML \u5e8f\u5217\u5716<\/h2>\n<p><a href=\"https:\/\/vpascode.com\" rel=\"noopener\" target=\"_blank\">Visual Paradigm VPasCode<\/a> \u662f\u4e00\u500b\u70ba\u958b\u767c\u8005\u3001\u6280\u8853\u64b0\u5beb\u8005\u548c\u8edf\u9ad4\u67b6\u69cb\u5e2b\u8a2d\u8a08\u7684\u6574\u5408\u5f0f\u5716\u5f62\u7a0b\u5f0f\u78bc\u5e73\u53f0\u3002<\/p>\n<h3>\u5373\u6642\u9810\u89bd\u8207\u81ea\u52d5\u683c\u5f0f\u5075\u6e2c<\/h3>\n<p>VPasCode \u63d0\u4f9b\u96f6\u5b89\u88dd\u7684\u700f\u89bd\u5668\u74b0\u5883\uff0c\u4e26\u5177\u5099\u81ea\u52d5\u683c\u5f0f\u5075\u6e2c\u529f\u80fd\u3002\u53ea\u9700\u5c07\u539f\u59cb\u7684 PlantUML\u3001Mermaid\u3001D2 \u6216 Graphviz \u7a0b\u5f0f\u78bc\u8cbc\u5165\u7de8\u8f2f\u5668\uff0c\u700f\u89bd\u5668\u6703\u81ea\u52d5\u8b58\u5225\u8a9e\u8a00\uff0c\u4e26\u5728\u60a8\u8f38\u5165\u6642\u5373\u6642\u5448\u73fe\u4e92\u52d5\u5f0f\u9810\u89bd\u3002<\/p>\n<h3>\u4e00\u9375 AI 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