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场景

Node-RED简介与Windows上安装、启动和运行示例：

Node-RED怎样导出导入流程为json文件：

CSV的内容是使用纯文字方式表示的表格资料，第一行是表格的标题，每一列用,隔开。

例如：

Name,height,weight

怎样将数据存储到txt文件中，需要时从文件中读取并解析获取数据。

注：

博客：

实现

1、页面布局

2、template节点，输入csv资料

3、file节点，将csv资料用utf-8编码写入D://file.txt

4、file in节点，读取file.txt，输出utf-8的一个字符

5、csv节点，剖析csv资料，输入列名，分隔符是逗号，因为第一列是标题列，所以在输入时忽略第一行

输出时选择每行一条信息

6、解析效果

7、json数据

[    {        "id": "f4a4d8eab7935bc8",        "type": "tab",        "label": "流程 3",        "disabled": false,        "info": "",        "env": []    },    {        "id": "c428312d1f6165d1",        "type": "mqtt-broker",        "name": "mqtt",        "broker": "127.0.0.1",        "port": "1883",        "clientid": "",        "autoConnect": true,        "usetls": false,        "protocolVersion": "4",        "keepalive": "60",        "cleansession": true,        "birthTopic": "",        "birthQos": "0",        "birthPayload": "",        "birthMsg": {},        "closeTopic": "",        "closeQos": "0",        "closePayload": "",        "closeMsg": {},        "willTopic": "",        "willQos": "0",        "willPayload": "",        "willMsg": {},        "sessionExpiry": ""    },    {        "id": "51eee50b4ec9422f",        "type": "ui_group",        "name": "dashboardDemo",        "tab": "29ae4c620f43ee0d",        "order": 1,        "disp": true,        "width": "6",        "collapse": false,        "className": ""    },    {        "id": "29ae4c620f43ee0d",        "type": "ui_tab",        "name": "Home",        "icon": "dashboard",        "disabled": false,        "hidden": false    },    {        "id": "a506c767a5c1edbd",        "type": "ui_base",        "theme": {            "name": "theme-light",            "lightTheme": {                "default": "#0094CE",                "baseColor": "#0094CE",                "baseFont": "-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif",                "edited": true,                "reset": false            },            "darkTheme": {                "default": "#097479",                "baseColor": "#097479",                "baseFont": "-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif",                "edited": false            },            "customTheme": {                "name": "Untitled Theme 1",                "default": "#4B7930",                "baseColor": "#4B7930",                "baseFont": "-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif"            },            "themeState": {                "base-color": {                    "default": "#0094CE",                    "value": "#0094CE",                    "edited": false                },                "page-titlebar-backgroundColor": {                    "value": "#0094CE",                    "edited": false                },                "page-backgroundColor": {                    "value": "#fafafa",                    "edited": false                },                "page-sidebar-backgroundColor": {                    "value": "#ffffff",                    "edited": false                },                "group-textColor": {                    "value": "#1bbfff",                    "edited": false                },                "group-borderColor": {                    "value": "#ffffff",                    "edited": false                },                "group-backgroundColor": {                    "value": "#ffffff",                    "edited": false                },                "widget-textColor": {                    "value": "#111111",                    "edited": false                },                "widget-backgroundColor": {                    "value": "#0094ce",                    "edited": false                },                "widget-borderColor": {                    "value": "#ffffff",                    "edited": false                },                "base-font": {                    "value": "-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen-Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif"                }            },            "angularTheme": {                "primary": "indigo",                "accents": "blue",                "warn": "red",                "background": "grey",                "palette": "light"            }        },        "site": {            "name": "Node-RED Dashboard",            "hideToolbar": "false",            "allowSwipe": "false",            "lockMenu": "false",            "allowTempTheme": "true",            "dateFormat": "DD/MM/YYYY",            "sizes": {                "sx": 48,                "sy": 48,                "gx": 6,                "gy": 6,                "cx": 6,                "cy": 6,                "px": 0,                "py": 0            }        }    },    {        "id": "248cbbb0.18e794",        "type": "ui_group",        "name": "MyGroup",        "tab": "3f79c420.cfc1bc",        "order": 1,        "disp": true,        "width": "6",        "collapse": false    },    {        "id": "3f79c420.cfc1bc",        "type": "ui_tab",        "name": "Home",        "icon": "dashboard",        "disabled": false,        "hidden": false    },    {        "id": "a0954be5.a7f7e8",        "type": "ui_group",        "name": "MyInput",        "tab": "3f79c420.cfc1bc",        "order": 2,        "disp": true,        "width": "6",        "collapse": false    },    {        "id": "508bd6f8398ab80f",        "type": "ui_group",        "name": "OpenWeatherMap",        "tab": "3f79c420.cfc1bc",        "order": 3,        "disp": true,        "width": "6",        "collapse": false    },    {        "id": "8824dea1.83e31",        "type": "websocket-client",        "path": "ws://localhost:9898/",        "tls": "",        "wholemsg": "false"    },    {        "id": "f9c23ff5.026e",        "type": "file",        "z": "f4a4d8eab7935bc8",        "name": "",        "filename": "D://file.txt",        "appendNewline": true,        "createDir": false,        "overwriteFile": "true",        "encoding": "utf8",        "x": 480,        "y": 180,        "wires": [            []        ]    },    {        "id": "2ebfe992.fdc746",        "type": "inject",        "z": "f4a4d8eab7935bc8",        "name": "",        "repeat": "",        "crontab": "",        "once": false,        "onceDelay": 0.1,        "topic": "",        "payload": "",        "payloadType": "date",        "x": 190,        "y": 240,        "wires": [            [                "cfaafb8.012a108"            ]        ]    },    {        "id": "cfaafb8.012a108",        "type": "file in",        "z": "f4a4d8eab7935bc8",        "name": "",        "filename": "D://file.txt",        "format": "utf8",        "chunk": false,        "sendError": false,        "encoding": "utf8",        "allProps": false,        "x": 340,        "y": 240,        "wires": [            [                "ee4f2b44.0fc328"            ]        ]    },    {        "id": "32435220.d9c6ee",        "type": "debug",        "z": "f4a4d8eab7935bc8",        "name": "",        "active": true,        "tosidebar": true,        "console": false,        "tostatus": false,        "complete": "payload.weight",        "targetType": "msg",        "statusVal": "",        "statusType": "auto",        "x": 680,        "y": 280,        "wires": []    },    {        "id": "ee4f2b44.0fc328",        "type": "csv",        "z": "f4a4d8eab7935bc8",        "name": "",        "sep": ",",        "hdrin": "",        "hdrout": "none",        "multi": "one",        "ret": "\\n",        "temp": "name,height,weight",        "skip": "1",        "strings": true,        "include_empty_strings": "",        "include_null_values": "",        "x": 470,        "y": 240,        "wires": [            [                "f250620f.1071d",                "d9c16f6a.a9d4b",                "32435220.d9c6ee"            ]        ]    },    {        "id": "f250620f.1071d",        "type": "debug",        "z": "f4a4d8eab7935bc8",        "name": "",        "active": true,        "tosidebar": true,        "console": false,        "tostatus": false,        "complete": "payload.name",        "targetType": "msg",        "statusVal": "",        "statusType": "auto",        "x": 670,        "y": 200,        "wires": []    },    {        "id": "d9c16f6a.a9d4b",        "type": "debug",        "z": "f4a4d8eab7935bc8",        "name": "",        "active": true,        "tosidebar": true,        "console": false,        "tostatus": false,        "complete": "payload.height",        "targetType": "msg",        "statusVal": "",        "statusType": "auto",        "x": 670,        "y": 240,        "wires": []    },    {        "id": "277f6cb6.89e434",        "type": "template",        "z": "f4a4d8eab7935bc8",        "name": "",        "field": "payload",        "fieldType": "msg",        "format": "handlebars",        "syntax": "mustache",        "template": "Name,height,weight\nJoe,170,70\nMary,160,49",        "output": "str",        "x": 330,        "y": 180,        "wires": [            [                "f9c23ff5.026e"            ]        ]    },    {        "id": "f22a93b5.26844",        "type": "inject",        "z": "f4a4d8eab7935bc8",        "name": "",        "props": [            {                "p": "payload"            },            {                "p": "topic",                "vt": "str"            }        ],        "repeat": "",        "crontab": "",        "once": false,        "onceDelay": 0.1,        "topic": "",        "payloadType": "date",        "x": 190,        "y": 180,        "wires": [            [                "277f6cb6.89e434"            ]        ]    }]

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