{"id":2106,"date":"2026-05-26T08:05:43","date_gmt":"2026-05-26T08:05:43","guid":{"rendered":"https:\/\/www.vpascode.com\/cn\/docs\/uncategorized\/mermaid-js-sequence-diagram-syntax-guide\/"},"modified":"2026-05-26T08:05:43","modified_gmt":"2026-05-26T08:05:43","slug":"mermaid-js-sequence-diagram-syntax-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/cn\/docs\/vpascode-docs\/mermaid-js-sequence-diagram-syntax-guide\/","title":{"rendered":"Mermaid.js \u65f6\u5e8f\u56fe\u8bed\u6cd5\u6307\u5357"},"content":{"rendered":"<h2>\u4ec0\u4e48\u662f\u65f6\u5e8f\u56fe\uff1f<\/h2>\n<p>\u4e00\u4e2a<strong>\u65f6\u5e8f\u56fe<\/strong>\u662f\u4e00\u79cd\u5173\u952e\u7684\u884c\u4e3a<strong>UML \u56fe<\/strong>\u7528\u4e8e\u53ef\u89c6\u5316\u4e0d\u540c\u7cfb\u7edf\u5b9e\u4f53\u4e4b\u95f4\u5728\u65f6\u95f4\u8f74\u4e0a\u7684\u6d88\u606f\u3001\u51fd\u6570\u8c03\u7528\u548c\u6570\u636e\u8d1f\u8f7d\u7684\u65f6\u5e8f\u6d41\u7a0b\u3002\u88ab\u516c\u8ba4\u4e3a\u6838\u5fc3<strong>UML \u56fe\u7c7b\u578b<\/strong>\uff0c\u5b83\u901a\u8fc7\u5c06\u7cfb\u7edf\u7ec4\u4ef6\u6cbfX\u8f74\u5806\u53e0\u4e3a\u5782\u76f4\u7684\u751f\u547d\u7ebf\uff0c\u5e76\u6cbfY\u8f74\u8ffd\u8e2a\u6d88\u606f\u4ea4\u6362\u6765\u63cf\u7ed8\u8fd0\u884c\u65f6\u4ea4\u4e92\u3002\u8fd9\u4e00\u84dd\u56fe\u5bf9\u5f00\u53d1\u8005\u8c03\u8bd5\u5206\u5e03\u5f0fAPI\u63e1\u624b\u3001\u5fae\u670d\u52a1\u7f16\u6392\u8def\u5f84\u6216\u5b9e\u65f6\u7528\u6237\u8ba4\u8bc1\u6d41\u7a0b\u6781\u4e3a\u5b9d\u8d35\u3002<\/p>\n<p>\u4f7f\u7528<strong>Mermaid.js<\/strong>\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u76f4\u89c2\u7684\u6587\u672c\u7ed3\u6784\u6765\u7f16\u5199\u590d\u6742\u7684\u65f6\u5e8f\u8fc7\u7a0b\u3002\u5f15\u64ce\u4f1a\u81ea\u52a8\u5904\u7406\u5782\u76f4\u95f4\u8ddd\uff0c\u7ba1\u7406\u6d88\u606f\u7bad\u5934\u5bf9\u9f50\uff0c\u5e76\u5728\u753b\u5e03\u4e0a\u6e05\u6670\u7ed8\u5236\u8fd0\u884c\u65f6\u6fc0\u6d3b\u5757\u3002<\/p>\n<h2>\u6838\u5fc3\u8bed\u6cd5\u6307\u5357\uff1a\u5143\u7d20\u4e0e\u7ed3\u6784<\/h2>\n<p>\u8981\u5728Mermaid\u4e2d\u8bbe\u8ba1\u51fa\u51c6\u786e\u4e14\u6613\u4e8e\u626b\u63cf\u7684UML\u65f6\u5e8f\u56fe\uff0c\u4f60\u5fc5\u987b\u638c\u63e1\u53c2\u4e0e\u8005\u58f0\u660e\u3001\u6d88\u606f\u7bad\u5934\u53d8\u4f53\u3001\u663e\u5f0f\u751f\u547d\u7ebf\u4ee5\u53ca\u6761\u4ef6\u5757\u7ed3\u6784\u3002<\/p>\n<h3>1. \u58f0\u660e\u53c2\u4e0e\u8005\u548c\u89d2\u8272<\/h3>\n<p>\u4f60\u4f7f\u7528<code>participant<\/code>\u5173\u952e\u5b57\u6765\u58f0\u660e\u4e00\u4e2a\u6807\u51c6\u7cfb\u7edf\u5b9e\u4f53\u3002\u5982\u679c\u8be5\u5b9e\u4f53\u4ee3\u8868\u4eba\u7c7b\u7ec8\u7aef\u7528\u6237\u6216\u5916\u90e8\u64cd\u4f5c\u5458\uff0c\u8bf7\u4f7f\u7528<code>actor<\/code>\u5173\u952e\u5b57\u5728\u753b\u5e03\u4e0a\u6e32\u67d3\u4e00\u4e2a\u6807\u51c6\u7684\u68d2\u72b6\u4eba\u7269\u56fe\u6807\uff1a<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAgsTkkvwiBeeczNS8EohIQWJRSWZyZkFiXomCY4CnQmKxgntiSWp5YqVCUH5pSWoRAF8GF\/U=\" 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\u7f16\u8f91Mermaid<\/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\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAgsTkkvwihafrFj3r2P589XqIYEFiUUlmcmZBYl6JgmOAp0JiscLzvROftm5+sX398ykbn85cAQCAcSGw\" \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 Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">sequenceDiagram\r\n    actor \u5ba2\u6237\u7aef\r\n    participant API as \u7f51\u5173\u8def\u7531\u5668<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAgsTkkvwihafrFj3r2P589XqIYEFiUUlmcmZBYl6JgmOAp0JiscLzvROftm5+sX398ykbn85cAQCAcSGw\" \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 Mermaid 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\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAgsTkkvwiBeeczNS8EohIQWJRSWZyZkFiXomCY4CnQmKxgntiSWp5YqVCUH5pSWoRAF8GF\/U=\" 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\u7f16\u8f91Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"WdDXIln\"><img fetchpriority=\"high\" alt=\"\" class=\"alignnone size-full wp-image-623\" decoding=\"async\" fetchpriority=\"high\" height=\"171\" sizes=\"(max-width: 450px) 100vw, 450px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190364bd762.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190364bd762.png 450w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190364bd762-300x114.png 300w\" width=\"450\"\/><\/p>\n<p><em>\u4e13\u4e1a\u63d0\u793a\uff1a<\/em>\u4f7f\u7528<code>as<\/code>\u5173\u952e\u5b57\u5c06\u957f\u7ec4\u4ef6\u540d\u79f0\u6620\u5c04\u4e3a\u7d27\u51d1\u7684\u5185\u90e8\u522b\u540d\uff0c\u4f7f\u4f60\u7684\u6d88\u606f\u811a\u672c\u7b80\u6d01\u4e14\u6613\u4e8e\u9605\u8bfb\u3002<\/p>\n<h3>2. \u683c\u5f0f\u5316\u6d88\u606f\u7bad\u5934<\/h3>\n<p>\u4f60\u4f7f\u7528\u7684\u7ebf\u6761\u7c7b\u578b\u548c\u7bad\u5934\u6837\u5f0f\u51b3\u5b9a\u4e86\u7cfb\u7edf\u53c2\u4e0e\u8005\u4e4b\u95f4\u7684\u901a\u4fe1\u98ce\u683c\uff1a<\/p>\n<ul>\n<li><code>-&gt;&gt;<\/code> **\u540c\u6b65\u8c03\u7528\uff1a** \u5b9e\u7ebf\u5e26\u5b9e\u5fc3\u7bad\u5934\u3002\u8868\u793a\u4e00\u4e2a\u963b\u585e\u8bf7\u6c42\uff0c\u4f1a\u7b49\u5f85\u6267\u884c\u5b8c\u6210\u3002<\/li>\n<li><code>--&gt;<\/code> **\u54cd\u5e94\u7ebf\uff1a** \u865a\u7ebf\u5e26\u7a7a\u5fc3\u7bad\u5934\u3002\u7528\u4e8e\u8fd4\u56de\u6570\u636e\u8d1f\u8f7d\u6216\u786e\u8ba4\u4ee4\u724c\u3002<\/li>\n<li><code>-&gt;<\/code> **\u5f02\u6b65\u8c03\u7528\uff1a** \u5b9e\u7ebf\u5e26\u7a7a\u5fc3\u7bad\u5934\u3002\u8868\u793a\u975e\u963b\u585e\u7684\u6d88\u606f\u6216\u4e8b\u4ef6\u5e7f\u64ad\u3002<\/li>\n<\/ul>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAAseCAl07u+DUorLUIiuFIJCS4hKFgMTKnPzEFIgSiKSurh1QrZWCkYGBgr83UGVxQX5ecSoAn9Ua8A==\" 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\u7f16\u8f91 Mermaid<\/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\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAAseCAl07u+DUorLUIiuFF+u3P9vY9GLL\/Bd790LkITK6unZAhVYKRgYGCv7eCk8n9z7dNQUAxW0fCg==\" \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 Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">sequenceDiagram\r\n    App-&gt;&gt;Server: \u8bf7\u6c42\u8d1f\u8f7d\r\n    Server--&gt;App: 200 OK \u54cd\u5e94<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAAseCAl07u+DUorLUIiuFF+u3P9vY9GLL\/Bd790LkITK6unZAhVYKRgYGCv7eCk8n9z7dNQUAxW0fCg==\" \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 Mermaid 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\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAAseCAl07u+DUorLUIiuFIJCS4hKFgMTKnPzEFIgSiKSurh1QrZWCkYGBgr83UGVxQX5ecSoAn9Ua8A==\" 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\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"jLtFHya\"><img alt=\"\" class=\"alignnone size-full wp-image-624\" decoding=\"async\" height=\"267\" sizes=\"(max-width: 450px) 100vw, 450px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190369d9ad7.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190369d9ad7.png 450w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190369d9ad7-300x178.png 300w\" width=\"450\"\/><\/p>\n<h3>3. \u7ba1\u7406\u751f\u547d\u7ebf\u6fc0\u6d3b\u6761<\/h3>\n<p>\u8981\u7cbe\u786e\u663e\u793a\u7cfb\u7edf\u7ec4\u4ef6\u4f55\u65f6\u6b63\u5728\u6267\u884c\u4efb\u52a1\u6216\u5360\u7528\u7ebf\u7a0b\u5185\u5b58\uff0c\u8bf7\u4f7f\u7528<code>activate<\/code> \u548c <code>deactivate<\/code> \u547d\u4ee4\u3002\u6216\u8005\uff0c\u60a8\u53ef\u4ee5\u76f4\u63a5\u5728\u6d88\u606f\u76ee\u6807\u540e\u6dfb\u52a0\u52a0\u53f7\uff08<code>+<\/code>\uff09\u6216\u51cf\u53f7\uff08<code>-<\/code>\uff09\u7b26\u53f7\u4f5c\u4e3a\u5feb\u901f\u7684\u89c6\u89c9\u5feb\u6377\u65b9\u5f0f\uff1a<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNolzDEKwzAMBdC90DtoyVR8gQxekgOU5ATCfILAcagku\/T2Degvf\/iPb\/h0tIJV+FA+nw+6s1RB85Tza4cO6ExvvQrMaGXnMNNEMZIYtetLQ6xzrT\/i4jIQKkhKOcXnTBu8a7vLenX7AzPwKV4=\" 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\u7f16\u8f91 Mermaid<\/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\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAAueczNS8El07O+3g1KKy1CIrhadLWp5PaHs2dcOz3nUQNaqqCs\/m9D7tWvh05ornfRuezlkBRC+Wt71Y3vlkRxdQ\/ZNdfc\/2Nzzbsvt517ZnDY0QXRDzdHXtdCF2WCm82D\/l6ex5z3dPfjZvDgC51kUL\" \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 Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">sequenceDiagram\r\n    Client-&gt;&gt;+Server: \u5904\u7406\u6570\u636e\r\n    %% \u670d\u52a1\u5668\u73b0\u5728\u5728\u89c6\u89c9\u4e0a\u5904\u4e8e\u6fc0\u6d3b\u72b6\u6001\r\n    Server--&gt;-Client: \u8fd4\u56de\u7ed3\u679c<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAAueczNS8El07O+3g1KKy1CIrhadLWp5PaHs2dcOz3nUQNaqqCs\/m9D7tWvh05ornfRuezlkBRC+Wt71Y3vlkRxdQ\/ZNdfc\/2Nzzbsvt517ZnDY0QXRDzdHXtdCF2WCm82D\/l6ex5z3dPfjZvDgC51kUL\" \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 Mermaid 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\/editor\/#mermaid:eNolzDEKwzAMBdC90DtoyVR8gQxekgOU5ATCfILAcagku\/T2Degvf\/iPb\/h0tIJV+FA+nw+6s1RB85Tza4cO6ExvvQrMaGXnMNNEMZIYtetLQ6xzrT\/i4jIQKkhKOcXnTBu8a7vLenX7AzPwKV4=\" 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\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"cOetWMX\"><img alt=\"\" class=\"alignnone size-full wp-image-625\" decoding=\"async\" height=\"267\" sizes=\"(max-width: 450px) 100vw, 450px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19036e236c9.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19036e236c9.png 450w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19036e236c9-300x178.png 300w\" width=\"450\"\/><\/p>\n<h3>4. \u7ed3\u6784\u5316\u6761\u4ef6\u548c\u66ff\u4ee3\u65b9\u6848\uff08Alt\u3001Opt\u3001Loop\uff09<\/h3>\n<p>\u4e3a\u4e86\u5904\u7406\u5206\u652f\u8fd0\u884c\u65f6\u903b\u8f91\u3001\u4ee4\u724c\u8bc4\u4f30\u6216\u91cd\u590d\u7684\u8bf7\u6c42\u91cd\u8bd5\uff0c\u8bf7\u5c06\u60a8\u7684\u6d88\u606f\u811a\u672c\u5305\u88f9\u5728\u6807\u51c6\u5757\u7247\u6bb5\u4e2d\uff1a<\/p>\n<ul>\n<li><code>alt \/ else<\/code> \u2014 \u8bc4\u4f30\u6761\u4ef6\u8def\u5f84\uff08\u7c7b\u4f3c\u4e8e if\/else \u4ee3\u7801\u5757\uff09\u3002<\/li>\n<li><code>opt<\/code> \u2014 \u5b9a\u4e49\u4e00\u4e2a\u4ec5\u5728\u7279\u5b9a\u6761\u4ef6\u4e0b\u6267\u884c\u7684\u53ef\u9009\u6b65\u9aa4\u3002<\/li>\n<li><code>\u5faa\u73af<\/code> \u2014 \u91cd\u590d\u6267\u884c\u4e00\u4e2a\u64cd\u4f5c\u5e8f\u5217\uff0c\u76f4\u5230\u6ee1\u8db3\u67d0\u4e2a\u6761\u4ef6\u4e3a\u6b62\u3002<\/li>\n<\/ul>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAgpz8\/AIF17LUokoFYwOF4tTk\/LyUYogUCDjnZKbmleja2QWnFgEVWSl4pCYWlSSlJpYoBGTmpUMUpualAABAyxwZ\" 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\u7f16\u8f91 Mermaid<\/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\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAgqf7Vj3vW6\/wbH2\/scHz5ZMggmCJdYuedWx\/vnq9rp3dszm9T7sWPp25wkrh6f7mF9s3P+tb9GxrN0Tx892Tn82dDwCEHyx7\" \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 Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">sequenceDiagram\r\n    \u5faa\u73af \u6bcf30\u79d2\r\n        \u5ba2\u6237\u7aef-&gt;&gt;\u670d\u52a1\u5668: \u5fc3\u8df3\u63a2\u6d4b\r\n    \u7ed3\u675f<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAgqf7Vj3vW6\/wbH2\/scHz5ZMggmCJdYuedWx\/vnq9rp3dszm9T7sWPp25wkrh6f7mF9s3P+tb9GxrN0Tx892Tn82dDwCEHyx7\" \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 Mermaid 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\/editor\/#mermaid:eNorTi0sTc1LTnXJTEwvSszl5VIAgpz8\/AIF17LUokoFYwOF4tTk\/LyUYogUCDjnZKbmleja2QWnFgEVWSl4pCYWlSSlJpYoBGTmpUMUpualAABAyxwZ\" 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\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"VlRPVlQ\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-626\" decoding=\"async\" height=\"274\" loading=\"lazy\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190372961a2.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190372961a2.png 450w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a190372961a2-300x183.png 300w\" width=\"450\"\/><\/p>\n<h2>\u6e05\u6670\u5e8f\u5217\u65f6\u95f4\u7ebf\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n<ul>\n<li><strong>\u4fdd\u6301\u751f\u547d\u7ebf\u7b80\u6d01\uff1a<\/strong> \u907f\u514d\u5728 X \u8f74\u4e0a\u5217\u51fa\u6570\u5341\u4e2a\u5fae\u5b9e\u4f53\u3002\u5982\u679c\u4e00\u4e2a\u8fc7\u7a0b\u4e0e\u6b21\u8981\u7684\u8f85\u52a9\u7c7b\u4ea4\u4e92\uff0c\u5e94\u5c06\u5176\u62bd\u8c61\u5230\u9ad8\u5c42\u7cfb\u7edf\u8fb9\u754c\u4e4b\u540e\uff0c\u4f8b\u5982<code>[\u8ba4\u8bc1\u5de5\u4f5c\u5668]<\/code> \u6216 <code>[\u7f13\u5b58\u6c60]<\/code>.<\/li>\n<li><strong>\u660e\u786e\u6807\u6ce8\u72b6\u6001\u7801\uff1a<\/strong> \u5728\u7f16\u5199\u54cd\u5e94\u8fd4\u56de\u65f6\uff08<code>--&gt;<\/code>\uff09\uff0c\u4e0d\u8981\u53ea\u5199\u201c\u8fd4\u56de\u6570\u636e\u201d\u3002\u7528\u660e\u786e\u7684 HTTP \u72b6\u6001\u7801\u6216\u4e8b\u4ef6\u7c7b\u578b\u6807\u6ce8\u8def\u5f84\uff08\u4f8b\u5982\uff0c<code>\"201 \u5df2\u521b\u5efa\uff08JWT \u4ee4\u724c\uff09\"<\/code>\uff09\uff0c\u4e3a\u5de5\u7a0b\u5e08\u63d0\u4f9b\u7cbe\u786e\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002<\/li>\n<li><strong>\u4e3a\u590d\u6742\u8ba1\u7b97\u6dfb\u52a0\u6ce8\u91ca\uff1a<\/strong> \u4f7f\u7528 <code>Note over<\/code>, <code>Note left of<\/code>\uff0c\u6216 <code>Note right of<\/code> \u6307\u4ee4\u6765\u8bb0\u5f55\u975e\u53ef\u89c6\u5316\u64cd\u4f5c\uff0c\u4f8b\u5982\u5185\u90e8\u52a0\u5bc6\u6b65\u9aa4\u6216\u6570\u636e\u5e93\u6570\u636e\u54c8\u5e0c\u3002<\/li>\n<\/ul>\n<h2>\u73b0\u5b9e\u4e16\u754c\u4e2d\u7684 Mermaid.js \u5e8f\u5217\u56fe\u793a\u4f8b<\/h2>\n<h3>\u793a\u4f8b 1\uff1a\u5b89\u5168\u7684 OAuth2 \u4ee4\u724c\u4ea4\u6362\u6d41\u7a0b\uff08\u6fc0\u6d3b\u4e0e\u66ff\u4ee3\u5206\u652f\uff09<\/h3>\n<p>\u6b64\u529f\u80fd\u84dd\u56fe\u6a21\u62df\u4e86\u4e00\u4e2a\u5b89\u5168\u7684\u7528\u6237\u767b\u5f55\u6d41\u7a0b\u3002\u5b83\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 alt\/else \u5206\u652f\u7ec4\u5408\u4eba\u7c7b\u53c2\u4e0e\u8005\u3001\u660e\u786e\u7684\u7cfb\u7edf\u751f\u547d\u7ebf\u4ee5\u53ca\u590d\u6742\u7684\u9a8c\u8bc1\u8def\u5f84\u3002<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNptUstOAjEU3Zv4DzcsjMYQ8bFiQTJBEjAaCYguzaW9MA0z7XjbAfXr7WNIBnA208d59bSWvmrSgh4VrhnL8zPwHwpnGBaWGNDCSMs4TnsVslNCVagdZFUVAC9mqQqKs2GhSLt\/kLXLAzT8ezCRHqTcD0zZbJUM0okSbLqDwbWX6gctsYHOs1krDTvlBV4DvZOgHhKRfqUPM5KKSbgEEzHEp5JwAVaYihqGh3Y9J5gEivbGkNQn2hGvUNBBjKQ9r5elcjBkiqmxsAnUEt1D37FQEh3BFK3dGZYwRpu34VgcKEHGlFhpux0zdnDfuzs6XGxyaCS1GLGKFGH0LXLUa4oQWPlrzIQga+HNbEifunSjzYxczRqePt4SDi4nMg6uDl2O24tPxBuY2t\/x2JRNKCos+U634WCnxZ0csnF\/6N3CQqPfMax+ScKI2fBJgG5KMM\/NDjp7k7CmsaSbffMdyAri5iX6sH\/tqOE0\" 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\u7f16\u8f91 Mermaid<\/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\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid: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\" \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 Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">sequenceDiagram\r\n    actor User as \u6700\u7ec8\u7528\u6237\r\n    participant App as \u79fb\u52a8\u5e94\u7528\u5ba2\u6237\u7aef\r\n    participant Auth as Auth0 \u8eab\u4efd\u63d0\u4f9b\u8005\r\n\r\n    User-&gt;&gt;+App: \u70b9\u51fb\u201c\u4f7f\u7528 OAuth \u767b\u5f55\u201d\r\n    App-&gt;&gt;+Auth: \u91cd\u5b9a\u5411\u5e76\u643a\u5e26 client_id \u548c scope\r\n    Auth--&gt;&gt;User: \u6e32\u67d3\u767b\u5f55\u754c\u9762\r\n    User-&gt;&gt;Auth: \u63d0\u4ea4\u51ed\u636e\r\n    \r\n    Auth-&gt;&gt;Auth: \u9a8c\u8bc1\u5bc6\u7801\u54c8\u5e0c\r\n    \r\n    alt \u51ed\u636e\u6709\u6548\r\n        Auth--&gt;&gt;App: 302 \u91cd\u5b9a\u5411\u5e76\u643a\u5e26\u6388\u6743\u7801\r\n        App-&gt;&gt;Auth: \u7528\u6388\u6743\u7801\u6362\u53d6\u8bbf\u95ee\u4ee4\u724c\r\n        Auth--&gt;&gt;-App: \u8fd4\u56de JWT \u4ee4\u724c\uff08IdToken\uff09\r\n        App--&gt;&gt;User: \u6e32\u67d3\u7528\u6237\u8d26\u6237\u4e3b\u9875\r\n    else \u51ed\u636e\u65e0\u6548\r\n        Auth--&gt;&gt;App: \u8fd4\u56de 401 \u672a\u6388\u6743\u9519\u8bef\r\n        App--&gt;&gt;-User: \u663e\u793a\u201c\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef\u201d\u63d0\u793a\r\n    end<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNp1kstOwkAUhvcmvsPsDQleVixMTNzoxo3GpWnKRBuxVFr3qFGKKYIKXsELIUowtonxgq3Iu5iemXblKzjtQAKCXbRJz\/f\/\/zkzR8WbW1gW8awkrKaEjdERxB5B1JIptKTiFBJURMpp6ui0WCf6O68rQkqTREkRZA3NKEoA0QcHDupgFxkHZpWh9NEaQm9pawEefKPIsx9dp0XyBffrykvvjY5wQRAcmZ4eY9YxRHc+ION8p8tuq8280UJoQS8caJW+0xWuYGQoYKUY8jM5MC+hcAQfb6RgQ\/MeiQkJy9qKFEdwbCBVTCq4I2SKCJMGkTFEms\/k5oR705LhV6p9DXH7oF27BpknkjN5uceqC\/kNw7O2wdqnt9twokPT6EWFhIa4ASlnSUnnf3v7CUefjE4MGYYc6qSyy3x7VOH4PDm4py5BclXIn3pm2z8zXadGs8ZgUiSM8tpFuLpG88uLiIM\/n\/pcfDG5juWfz2x\/0t\/jChfDe7lnb7fp+HevHMcJFXenPLv9f8pO9FR0nG1ag\/fuFy88yxqIjXRyz79ozWYrwaOhkCP6KT9rLmR7wW6JMZ1O5PgvfIxQfA==\" \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 Mermaid 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\/editor\/#mermaid:eNptUstOAjEU3Zv4DzcsjMYQ8bFiQTJBEjAaCYguzaW9MA0z7XjbAfXr7WNIBnA208d59bSWvmrSgh4VrhnL8zPwHwpnGBaWGNDCSMs4TnsVslNCVagdZFUVAC9mqQqKs2GhSLt\/kLXLAzT8ezCRHqTcD0zZbJUM0okSbLqDwbWX6gctsYHOs1krDTvlBV4DvZOgHhKRfqUPM5KKSbgEEzHEp5JwAVaYihqGh3Y9J5gEivbGkNQn2hGvUNBBjKQ9r5elcjBkiqmxsAnUEt1D37FQEh3BFK3dGZYwRpu34VgcKEHGlFhpux0zdnDfuzs6XGxyaCS1GLGKFGH0LXLUa4oQWPlrzIQga+HNbEifunSjzYxczRqePt4SDi4nMg6uDl2O24tPxBuY2t\/x2JRNKCos+U634WCnxZ0csnF\/6N3CQqPfMax+ScKI2fBJgG5KMM\/NDjp7k7CmsaSbffMdyAri5iX6sH\/tqOE0\" 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\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"zhyELct\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-627\" decoding=\"async\" height=\"829\" loading=\"lazy\" sizes=\"auto, (max-width: 939px) 100vw, 939px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903768417b.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903768417b.png 939w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903768417b-300x265.png 300w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a1903768417b-768x678.png 768w\" width=\"939\"\/><\/p>\n<p><strong>\u8bed\u6cd5\u89e3\u6790\uff1a<\/strong> \u6b64\u65f6\u95f4\u7ebf\u8bb0\u5f55\u4e86\u591a\u65b9\u63e1\u624b\u8fc7\u7a0b\u3002<code>alt \/ else<\/code> \u5bb9\u5668\u6e05\u6670\u5730\u5c55\u793a\u4e86\u4e8c\u5143\u9a8c\u8bc1\u8def\u5f84\uff0c\u786e\u4fdd\u9519\u8bef\u72b6\u6001\u4e0e\u6b63\u5e38\u6d41\u7a0b\u4e00\u540c\u88ab\u5b8c\u6574\u8bb0\u5f55\u3002<\/p>\n<h3>\u793a\u4f8b 2\uff1a\u5206\u5e03\u5f0f\u8ba2\u5355\u5e93\u5b58\u7ed3\u8d26\uff08\u5e76\u884c\u6d41\u7a0b\u4e0e\u6ce8\u91ca\uff09<\/h3>\n<p>\u6b64\u9ad8\u7ea7\u7cfb\u7edf\u84dd\u56fe\u63cf\u7ed8\u4e86\u4e00\u4e2a\u4f01\u4e1a\u7ea7\u7535\u5b50\u5546\u52a1\u7ed3\u8d26\u6d41\u7a0b\u3002\u5b83\u5229\u7528\u5e76\u884c\u5757\uff08<code>par<\/code>\uff09\u6765\u5c55\u793a\u5e76\u53d1\u7684 API \u8c03\u5ea6\u6d41\u7a0b\uff0c\u5e76\u5728\u62d3\u6251\u7ed3\u6784\u4e2d\u5904\u7406\u6570\u636e\u5e93\u9501\u5b9a\u7684\u6ce8\u91ca\u3002<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Mermaid<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#mermaid: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\" 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\u7f16\u8f91 Mermaid<\/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\">Mermaid<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid: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\" \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 Mermaid in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-mermaid\"><code class=\"language-mermaid\" data-language=\"mermaid\" class=\"language-mermaid\">sequenceDiagram\r\n    participant Web as Web \u524d\u7aef\r\n    participant Ord as \u8ba2\u5355\u7f16\u6392\u5668\r\n    participant Inv as \u5e93\u5b58\u670d\u52a1\r\n    participant Pay as \u652f\u4ed8\u7f51\u5173\r\n\r\n    Web-&gt;&gt;+Ord: \u63d0\u4ea4\u7ed3\u8d26\u8bf7\u6c42\r\n    Note over Ord: \u9a8c\u8bc1\u5546\u54c1\u5e93\u5b58\u53ef\u7528\u6027\r\n    \r\n    par \u5e76\u53d1\u8c03\u7528 API\r\n        Ord-&gt;&gt;+Inv: \u9501\u5b9a\u5e93\u5b58\u9879\u76ee\r\n        Inv--&gt;-Ord: \u5e93\u5b58\u5df2\u9884\u7559\uff08\u5e93\u5b58\u9501\u5b9a\uff09\r\n    and\r\n        Ord-&gt;&gt;+Pay: \u6388\u6743\u4fe1\u7528\u5361\u6263\u6b3e\r\n        Pay--&gt;-Ord: \u6263\u6b3e\u6210\u529f\uff08\u4ea4\u6613\u7ed3\u7b97\uff09\r\n    end\r\n    \r\n    opt \u5904\u7406\u5206\u914d\u5931\u8d25\r\n        Note right of Ord: \u82e5\u4efb\u4e00\u8c03\u7528\u5931\u8d25\uff0c\u5219\u6267\u884c\u56de\u6eda\u6d41\u7a0b\r\n    end\r\n    \r\n    Ord--&gt;-Web: 200 \u6210\u529f\uff0c\u7ed3\u8d26\u786e\u8ba4<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#mermaid:eNptkctOwkAUhvcmvsPsDYlxyYLExA0bdee6SkUWAtZK4k5USLlUUEDBa6qoxEsriiIW9WV6ZoYVr+BpR2GBs2gX5zvnO\/PPury2IUeX5JmIFFak1fExgicuKWpkKRKXoipZkBeJtO79IKOze2sUmVNCLsLNS9ArrHtI9w6g1hjlgtGEy8FHCR6r9FSHrDEKzUubLkTLlmNX2ec+pF7GxwSGO\/gCgQnU+QktFJ2POrNLvHXDrTZtbgtmNqbKJJaQFeJhvbs8t5JQSUMpKbxQsFi5QbduBT9YgEDnDQr7\/GkHy2R6Pigq7sFJrhfXx4HlJJjHYlTP6LATc8gh4PMFfJ74V9Z+7l3uskqt39V+e7z+fjcj2qRoaMSDCeD99jR6tuN8G7gN6AbNXNGHryGKzEAlalQrQvYCPRgLrZYwGWYeDTzyn0d8Y3GVQH2XFdOgpXspHepN3roejvdSVCLhFZXElkWSPHft2LbzviUSEh39bh60Gs3cciMPJ+fUPqavSdbI\/St1r4c74yv6ydTkJPnbOC9ekRkmN+s\/cCgnkA==\" \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 Mermaid 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\/editor\/#mermaid: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\" 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\u7f16\u8f91 Mermaid<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"DDTNVua\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-628\" decoding=\"async\" height=\"692\" loading=\"lazy\" sizes=\"auto, (max-width: 1090px) 100vw, 1090px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19037c84393.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19037c84393.png 1090w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19037c84393-300x190.png 300w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19037c84393-1024x650.png 1024w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a19037c84393-768x488.png 768w\" width=\"1090\"\/><\/p>\n<p><strong>\u8bed\u6cd5\u89e3\u6790\uff1a<\/strong> \u8be5<code>par \/ and<\/code> \u5bb9\u5668\u6307\u793a\u5f15\u64ce\u5c06\u5e76\u884c\u6267\u884c\u64cd\u4f5c\u7ec4\u5408\u5728\u4e00\u8d77\uff0c\u8bb0\u5f55\u5e76\u53d1\u7684\u540e\u7aef\u64cd\u4f5c\u3002<code>Note over<\/code> \u548c <code>Note right of<\/code> \u6807\u7b7e\u5c06\u6280\u672f\u8fd0\u884c\u65f6\u89e3\u91ca\u76f4\u63a5\u6ce8\u5165\u753b\u5e03\u7f51\u683c\u4e2d\uff0c\u5e2e\u52a9\u56e2\u961f\u7406\u89e3\u6570\u636e\u9501\u5b9a\u548c\u56de\u6eda\u6d41\u7a0b\u7b49\u540e\u53f0\u4e8b\u52a1\uff0c\u800c\u4e0d\u4f1a\u4f7f\u4e3b\u6d88\u606f\u7bad\u5934\u53d8\u5f97\u6742\u4e71\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662f\u65f6\u5e8f\u56fe\uff1f 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\u56fe\u7528\u4e8e\u53ef\u89c6\u5316\u4e0d\u540c\u7cfb\u7edf\u5b9e\u4f53\u4e4b\u95f4\u5728&#8230;<\/p>\n","protected":false},"author":4,"featured_media":2107,"parent":0,"menu_order":3,"template":"","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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