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Node-RED中连接Mysql数据库并实现增删改查的操作

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导读：本篇文章讲解 Node-RED中连接Mysql数据库并实现增删改查的操作，希望对大家有帮助，欢迎收藏，转发！站点地址：www.bmabk.com，来源：原文

场景

Node-RED中建立静态网页和动态网页内容：

Node-RED中建立静态网页和动态网页内容_霸道流氓气质的博客-CSDN博客

在上面的基础上，怎样实现连接Mysql数据库并将数据库中的数据显示在网页上，以及执行插入、更新、删除操作。

注：

博客：
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实现

1、安装NodeRED节点

节点管理搜索node-red-node-mysql,安装

Node-RED中连接Mysql数据库并实现增删改查的操作

安装成功之后就会有Mysql节点了

Node-RED中连接Mysql数据库并实现增删改查的操作

2、数据库设计一个测试的用户表

Node-RED中连接Mysql数据库并实现增删改查的操作

流程设计如下

Node-RED中连接Mysql数据库并实现增删改查的操作

编辑function节点，使其执行查询语句

msg.topic = "SELECT * FROM user";
return msg;

Node-RED中连接Mysql数据库并实现增删改查的操作

3、编辑Mysql节点

Node-RED中连接Mysql数据库并实现增删改查的操作

编辑连接输入数据库连接信息

Node-RED中连接Mysql数据库并实现增删改查的操作

4、编辑template节点修改html显示模板

<html>
    <head>
        <title>用户</title>
    </head>
    <body>
      <table border="1">
       {{#payload}}
          <tr><td>{{name}}</td><td>{{pass}}</td></tr>
       {{/payload}}
      </table>
    </body>
</html>

Node-RED中连接Mysql数据库并实现增删改查的操作

5、部署运行访问

http://127.0.0.1:1880/allUser

Node-RED中连接Mysql数据库并实现增删改查的操作

6、查询流程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": "51c3503.61936b",
        "type": "MySQLdatabase",
        "name": "",
        "host": "127.0.0.1",
        "port": "3306",
        "db": "test",
        "tz": "",
        "charset": "UTF8"
    },
    {
        "id": "571a8ee8.5883d",
        "type": "http in",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "url": "/allUser",
        "method": "get",
        "upload": false,
        "swaggerDoc": "",
        "x": 210,
        "y": 160,
        "wires": [
            [
                "71ec3368.c3cf5c"
            ]
        ]
    },
    {
        "id": "7eb81f73.1710c",
        "type": "template",
        "z": "f4a4d8eab7935bc8",
        "name": "HTML网页",
        "field": "payload",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "<html>\n    <head>\n        <title>用户</title>\n    </head>\n    <body>\n      <table border=\"1\">\n       {{#payload}}\n          <tr><td>{{name}}</td><td>{{pass}}</td></tr>\n       {{/payload}}\n      </table>\n    </body>\n</html>",
        "x": 570,
        "y": 160,
        "wires": [
            [
                "766f42f9.87fbcc"
            ]
        ]
    },
    {
        "id": "71ec3368.c3cf5c",
        "type": "function",
        "z": "f4a4d8eab7935bc8",
        "name": "SQL Query",
        "func": "msg.topic = \"SELECT * FROM user\";\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 290,
        "y": 240,
        "wires": [
            [
                "1c7d1dcf.bb2ad2"
            ]
        ]
    },
    {
        "id": "766f42f9.87fbcc",
        "type": "http response",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "statusCode": "",
        "headers": {},
        "x": 610,
        "y": 240,
        "wires": []
    },
    {
        "id": "1c7d1dcf.bb2ad2",
        "type": "mysql",
        "z": "f4a4d8eab7935bc8",
        "mydb": "51c3503.61936b",
        "name": "",
        "x": 410,
        "y": 160,
        "wires": [
            [
                "7eb81f73.1710c"
            ]
        ]
    }
]

7、实现插入操作

新增插入数据的流程设计

Node-RED中连接Mysql数据库并实现增删改查的操作

编辑function节点，编辑插入语句

Node-RED中连接Mysql数据库并实现增删改查的操作

执行查看效果

Node-RED中连接Mysql数据库并实现增删改查的操作

插入流程json数据

[
    {
        "id": "1d9518ddb606e944",
        "type": "inject",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payloadType": "date",
        "x": 210,
        "y": 380,
        "wires": [
            [
                "e28fd0d0403014e0"
            ]
        ]
    },
    {
        "id": "e28fd0d0403014e0",
        "type": "function",
        "z": "f4a4d8eab7935bc8",
        "name": "INSERT",
        "func": "\nvar user = 'insertUser';\nvar pass = '123456';\n\nmsg.topic = \"INSERT INTO user \" +\n     \"(name,pass)\" +\n     \"VALUES ('\" + user +\n     \"','\"+ pass + \"' )\";\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 340,
        "y": 380,
        "wires": [
            [
                "fdde79cf9a1b1722"
            ]
        ]
    },
    {
        "id": "fdde79cf9a1b1722",
        "type": "mysql",
        "z": "f4a4d8eab7935bc8",
        "mydb": "51c3503.61936b",
        "name": "",
        "x": 480,
        "y": 380,
        "wires": [
            [
                "5ea56f3eec020d0f"
            ]
        ]
    },
    {
        "id": "5ea56f3eec020d0f",
        "type": "debug",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 630,
        "y": 380,
        "wires": []
    },
    {
        "id": "51c3503.61936b",
        "type": "MySQLdatabase",
        "name": "",
        "host": "127.0.0.1",
        "port": "3306",
        "db": "test",
        "tz": "",
        "charset": "UTF8",
        "credentials": {}
    }
]

8、新增更新语句执行流程设计如下

Node-RED中连接Mysql数据库并实现增删改查的操作

模板值可以在字符找那个嵌入运算式或变量。

但是注意的是字符串是使用反引号，在Tab上方的按钮括起，而不是使用单引号括起。

编辑function节点

var id = 3;
var name = 'updateName';
var pass = '5555';
msg.topic = `UPDATE user SET name='${name}',` +
            `pass='${pass}' WHERE id=${id}`;
return msg;

Node-RED中连接Mysql数据库并实现增删改查的操作

部署运行看效果

Node-RED中连接Mysql数据库并实现增删改查的操作

更新流程json数据

[
    {
        "id": "5426aed100d65d31",
        "type": "inject",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 210,
        "y": 520,
        "wires": [
            [
                "a911307ea6b68a16"
            ]
        ]
    },
    {
        "id": "a911307ea6b68a16",
        "type": "function",
        "z": "f4a4d8eab7935bc8",
        "name": "UPDATE",
        "func": "var id = 3;\nvar name = 'updateName';\nvar pass = '5555';\nmsg.topic = `UPDATE user SET name='${name}',` +\n            `pass='${pass}' WHERE id=${id}`;\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 340,
        "y": 520,
        "wires": [
            [
                "eb4b3bd2a53dbb37",
                "d991b7f159d90812"
            ]
        ]
    },
    {
        "id": "eb4b3bd2a53dbb37",
        "type": "mysql",
        "z": "f4a4d8eab7935bc8",
        "mydb": "51c3503.61936b",
        "name": "",
        "x": 480,
        "y": 520,
        "wires": [
            [
                "c83545834bc01135"
            ]
        ]
    },
    {
        "id": "c83545834bc01135",
        "type": "debug",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 630,
        "y": 520,
        "wires": []
    },
    {
        "id": "d991b7f159d90812",
        "type": "debug",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "topic",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 480,
        "y": 600,
        "wires": []
    },
    {
        "id": "51c3503.61936b",
        "type": "MySQLdatabase",
        "name": "",
        "host": "127.0.0.1",
        "port": "3306",
        "db": "test",
        "tz": "",
        "charset": "UTF8"
    }
]

9、设计删除流程布局

Node-RED中连接Mysql数据库并实现增删改查的操作

编辑template节点

DELETE FROM user WHERE id='{{payload}}'

Node-RED中连接Mysql数据库并实现增删改查的操作

部署运行查看效果

 

Node-RED中连接Mysql数据库并实现增删改查的操作

删除流程json数据

[
    {
        "id": "883fb789f22f352f",
        "type": "inject",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "1",
        "payloadType": "str",
        "x": 210,
        "y": 720,
        "wires": [
            [
                "15479540478f4720"
            ]
        ]
    },
    {
        "id": "fd30c40a7a9d0baf",
        "type": "mysql",
        "z": "f4a4d8eab7935bc8",
        "mydb": "51c3503.61936b",
        "name": "",
        "x": 480,
        "y": 720,
        "wires": [
            [
                "6eb37dd7c809dd01"
            ]
        ]
    },
    {
        "id": "6eb37dd7c809dd01",
        "type": "debug",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 630,
        "y": 720,
        "wires": []
    },
    {
        "id": "15479540478f4720",
        "type": "template",
        "z": "f4a4d8eab7935bc8",
        "name": "DELETE",
        "field": "topic",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "DELETE FROM user WHERE id='{{payload}}'",
        "output": "str",
        "x": 340,
        "y": 720,
        "wires": [
            [
                "fd30c40a7a9d0baf"
            ]
        ]
    },
    {
        "id": "51c3503.61936b",
        "type": "MySQLdatabase",
        "name": "",
        "host": "127.0.0.1",
        "port": "3306",
        "db": "test",
        "tz": "",
        "charset": "UTF8"
    }
]

10、增删改查全流程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
                },
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                "accents": "blue",
                "warn": "red",
                "background": "grey",
                "palette": "light"
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        },
        "site": {
            "name": "Node-RED Dashboard",
            "hideToolbar": "false",
            "allowSwipe": "false",
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            "dateFormat": "DD/MM/YYYY",
            "sizes": {
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                "gx": 6,
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        "collapse": false
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    },
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        "type": "ui_group",
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        "width": "6",
        "collapse": false
    },
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        "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": "51c3503.61936b",
        "type": "MySQLdatabase",
        "name": "",
        "host": "127.0.0.1",
        "port": "3306",
        "db": "test",
        "tz": "",
        "charset": "UTF8"
    },
    {
        "id": "571a8ee8.5883d",
        "type": "http in",
        "z": "f4a4d8eab7935bc8",
        "name": "",
        "url": "/allUser",
        "method": "get",
        "upload": false,
        "swaggerDoc": "",
        "x": 210,
        "y": 160,
        "wires": [
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                "71ec3368.c3cf5c"
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        ]
    },
    {
        "id": "7eb81f73.1710c",
        "type": "template",
        "z": "f4a4d8eab7935bc8",
        "name": "HTML网页",
        "field": "payload",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "<html>\n    <head>\n        <title>用户</title>\n    </head>\n    <body>\n      <table border=\"1\">\n       {{#payload}}\n          <tr><td>{{name}}</td><td>{{pass}}</td></tr>\n       {{/payload}}\n      </table>\n    </body>\n</html>",
        "x": 570,
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        "name": "SQL Query",
        "func": "msg.topic = \"SELECT * FROM user\";\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 290,
        "y": 240,
        "wires": [
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        "statusCode": "",
        "headers": {},
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        "wires": []
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    {
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            },
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        ],
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        "name": "INSERT",
        "func": "\nvar user = 'insertUser';\nvar pass = '123456';\n\nmsg.topic = \"INSERT INTO user \" +\n     \"(name,pass)\" +\n     \"VALUES ('\" + user +\n     \"','\"+ pass + \"' )\";\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 340,
        "y": 380,
        "wires": [
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        "active": true,
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        "name": "UPDATE",
        "func": "var id = 3;\nvar name = 'updateName';\nvar pass = '5555';\nmsg.topic = `UPDATE user SET name='${name}',` +\n            `pass='${pass}' WHERE id=${id}`;\nreturn msg;",
        "outputs": 1,
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        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 340,
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        "repeat": "",
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        "once": false,
        "onceDelay": 0.1,
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        "payload": "1",
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        "complete": "payload",
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        "statusType": "auto",
        "x": 630,
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        "wires": []
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    {
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        "z": "f4a4d8eab7935bc8",
        "name": "DELETE",
        "field": "topic",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "DELETE FROM user WHERE id='{{payload}}'",
        "output": "str",
        "x": 340,
        "y": 720,
        "wires": [
            [
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]

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