前言

这是由于mysql自带的一段时间无动作会自动关闭的机制

解决

使用闭包可以完美解决问题

var mysql = require('mysql')

var sqlConfig = {
    host: 'localhost',
    user: 'root',
    password: 'pwd',
    database: 'dbbase'
}

var conn = function(){
    let connection = mysql.createConnection(sqlConfig)
    connection.connect()
    connection.on('error',err=>{
        console.log('Re-connecting lost connection: ');
        connection = mysql.createConnection(sqlConfig)

    })
    return function(){
        return connection
    }
}


module.exports = conn()