nodejs 链接mysql数据库

需要先npm install mysql 下载mysql，然后再电脑上安装mysql server端

const mysql  = require('mysql')
var connection = mysql.createConnection
({
    host     : 'localhost',
    user     : 'root',
    password : 'xgg001214',
    database : 'zmk_pc'
});
connection.connect();
var sql = "insert into zmk_user (user_name,pwd,nick)values('"+username.value+"','"+md5_pwd+"','"+nick.value+"')";
connection.query(sql,(err,result)=>
{
    if(err)
    {
        alert('insert error'+err.message);
        return;
    }
alert('insert success');            
})
connection.end();