MySQL 8.0 - Client does not support authentication protocol requested by server； consider upgrading

学习nodejs过程中，遇到了这个问题，从stack overflow上找到了解决办法，特此记录。

问题描述

由于某种原因，无法与服务器建立简单的连接。使用了最新的 MySQL Community 8.0 数据库以及默认设置的 Node.JS。下面是源代码：

var mysql = require('mysql');
var con = mysql.createConnection({
    
    
   host: "localhost",
   user: "root",
   password: "password",
   database: "test"
   });
con.connect(function(err) {
    
    
	if (err) 
		throw err;
    console.log("Connected!");
});

报错：

C:\Users\mysql-test>node app.js
    C:\Users\mysql-test\node_modules\mysql\lib\protocol\Parse
    r.js:80
            throw err; // Rethrow non-MySQL errors
            ^

Error: ER_NOT_SUPPORTED_AUTH_MODE: Client does not support authentication protocol requested by server; consider upgrading MySQL client
    at Handshake.Sequence._packetToError (C:\Users\mysql-
test\node_modules\mysql\lib\protocol\sequences\Sequence.js:52:14)
    at Handshake.ErrorPacket (C:\Users\mysql-test\node_mo
dules\mysql\lib\protocol\sequences\Handshake.js:130:18)
    at Protocol._parsePacket (C:\Users\mysql-test\node_mo
dules\mysql\lib\protocol\Protocol.js:279:23)
    at Parser.write (C:\Users\mysql-test\node_modules\mys
ql\lib\protocol\Parser.js:76:12)
    at Protocol.write (C:\Users\mysql-test\node_modules\m
ysql\lib\protocol\Protocol.js:39:16)
    at Socket.<anonymous> (C:\Users\mysql-test\node_modul
es\mysql\lib\Connection.js:103:28)
    at Socket.emit (events.js:159:13)
    at addChunk (_stream_readable.js:265:12)
    at readableAddChunk (_stream_readable.js:252:11)
    at Socket.Readable.push (_stream_readable.js:209:10)
    --------------------
    at Protocol._enqueue (C:\Users\mysql-test\node_module
s\mysql\lib\protocol\Protocol.js:145:48)
    at Protocol.handshake (C:\Users\mysql-test\node_modul
es\mysql\lib\protocol\Protocol.js:52:23)
    at Connection.connect (C:\Users\mysql-test\node_modul
es\mysql\lib\Connection.js:130:18)
    at Object.<anonymous> (C:\Users\mysql-test\server.js:
11:5)
at Module._compile (module.js:660:30)
at Object.Module._extensions..js (module.js:671:10)
at Module.load (module.js:573:32)
at tryModuleLoad (module.js:513:12)
at Function.Module._load (module.js:505:3)
at Function.Module.runMain (module.js:701:10)

解决办法：

方法一【不推荐】

切换至更低版本的mysql

方法二 【推荐】

用"mysql2.js"包替换"mysql.js"

项目下执行命令：

npm un mysql && npm i mysql2