Question

我试图通过node.js连接到mysql服务器（host：localhost），我是node.js的新手，我不知道如何做到这一点，请帮助！

我用来连接服务器的当前代码

var client = require('socket.io').listen(8080).sockets,
    mysql = require('mysql');

var connection = mysql.createConnection({
    host : 'localhost',
    user : 'root',
    password : '',
    database : 'testDatabase',
    port : '3306'
});
connection.connect();
var strQuery = 'select * from users';

connection.query( strQuery, function(err, rows){
    if(err){
        throw err;
    }else{
        console.log(rows);
    }
});
connection.end();

显然给出了以下错误

Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'prashanthsun9'@'localhost
' (using password: YES)
    at Handshake.Sequence._packetToError (C:\wamp\www\node_chat\js\node_modules\
mysql\lib\protocol\sequences\Sequence.js:30:14)
    at Handshake.ErrorPacket (C:\wamp\www\node_chat\js\node_modules\mysql\lib\pr
otocol\sequences\Handshake.js:99:18)
    at Protocol._parsePacket (C:\wamp\www\node_chat\js\node_modules\mysql\lib\pr
otocol\Protocol.js:205:24)
    at Parser.write (C:\wamp\www\node_chat\js\node_modules\mysql\lib\protocol\Pa
rser.js:62:12)
    at Protocol.write (C:\wamp\www\node_chat\js\node_modules\mysql\lib\protocol\
Protocol.js:37:16)
    at Socket.<anonymous> (C:\wamp\www\node_chat\js\node_modules\mysql\lib\Conne
ction.js:73:28)
    at Socket.EventEmitter.emit (events.js:95:17)
    at Socket.<anonymous> (_stream_readable.js:746:14)
    at Socket.EventEmitter.emit (events.js:92:17)
    at emitReadable_ (_stream_readable.js:408:10)
    --------------------
    at Protocol._enqueue (C:\wamp\www\node_chat\js\node_modules\mysql\lib\protoc
ol\Protocol.js:110:48)
    at Protocol.handshake (C:\wamp\www\node_chat\js\node_modules\mysql\lib\proto
col\Protocol.js:42:41)
    at Connection.connect (C:\wamp\www\node_chat\js\node_modules\mysql\lib\Conne
ction.js:99:18)
    at Object.<anonymous> (C:\wamp\www\node_chat\js\server.js:11:12)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)

请帮助，请帮助!!!

Answer 1

尝试查询时尚未设置连接。要进行调试，请更改以下行：

connection.connect();

到

connection.connect(function(err, conn) {
    if(err) {
         console.log('MySQL connection error: ', err);
         process.exit(1);
    }

});

所以你会得到你的连接不正确的错误跟踪。

Answer 2

尝试将您的npm mysql版本升级为^2.1.1。

通过node.js连接到mysql时访问被拒绝

2 个答案: