新建better-mysql.js

const mysql = require('mysql');const config = require('../config/sqlConfig.js')let pool = mysql.createPool({user:config.mysql_user,password:config.mysql_password,database:config.mysql_database,host:config.mysql_host,port:config.port
})let query = ( sql, values ) => {return new Promise(( resolve, reject ) => {pool.getConnection(function(err, connection) {if (err) {reject( err )} else {connection.query(sql, values, ( err, fields) => {if ( err )   reject( err )else  resolve( fields )connection.release();})}})})
}
let createTable = ( sql ) => {return query( sql ,[])
}let tb_users =`create table if not exists tb_users(user_id VARCHAR(32) NOT NULL COMMENT '用户ID',username VARCHAR(100) NOT NULL COMMENT '用户名',password VARCHAR(100) NOT NULL COMMENT '密码',avator VARCHAR(100) NOT NULL COMMENT '头像',create_time VARCHAR(100) NOT NULL COMMENT '注册时间',login_status VARCHAR(100) NOT NULL COMMENT '登录状态',user_rule VARCHAR(100) NOT NULL COMMENT '用户角色',PRIMARY KEY ( user_id ));`
// 建用户表
createTable(tb_users)module.exports = {query}

调用方法演示，新建index.js文件

const Router = require("koa-router");
const { query } = require("./better-mysql.js");
const moment = require('moment');
let router = new Router({ prefix:"/user"})let userModel = {insertUser(value)=>{let _sql = "insert into tb_users set user_id=?, username=?,password=?,avator=?,create_time=?,login_status=?,user_rule=?;"return query( _sql, value)}
}
// 注册
router.post('/registor',async (ctx)=>{let username = "amisu10";let password = '1'password = common.md5(password);let user_id = common.uuid() ;let create_time = moment().format('YYYY-MM-DD HH:mm:ss');let avator = "头像";let login_status = "0";let user_rule = "1";await userModel.insertUser([user_id,username,password,avator,create_time,login_status,user_rule]).then(res => {console.log('注册成功',res);ctx.body = {code:0,count:count,message:'注册成功'}})}
})