NodeJs 连接mysql一例。

var mysql = require('mysql');
var connection = mysql.createConnection({
    host :'127.0.0.1',
    user :'root',
    password :'123456',
    port:'3306',
    database:'yycmsfortp'
});

connection.connect(function(err)
{
    if (err)
    {
        console.info("error");
    }
    else
    {
        console.info('ok');
    }
});

connection.query('select * from roles',function(err,rows,fields){
    if (err) {console.info('query:err');return;}
    for (var i = 0; i < rows.length; i++) {
        console.info(rows[i].ROLENAME);
    }
});