0如何解决数据库连接错误，在描述中是代码和错误

Question

我正在使用mysql和node.js。我正在尝试获得一个简单的连接，但是却收到此奇怪的错误。我正在使用的代码是这个

var mysql = require('mysql');
var connection = mysql.createConnection({
host: 'localhost',
user: 'root',
password: 'password',
database: 'userlogin'
});
connection.connect();

这是我得到的错误：

这是有关服务器的一些详细信息：

Answer 1

您是否尝试过在对我有用的工作台中执行此操作

import java.util.Scanner;

public class InvoiceApp {

    public static void main(String[] args) {
        // welcome the user to the program
        System.out.println("Welcome to the Invoice Total Calculator");
        System.out.println();  // print a blank line

        // create a Scanner object named sc
        Scanner sc = new Scanner(System.in);

        // perform invoice calculations until choice isn't equal to "y" or "Y"
        String choice = "y";
        while (choice.equalsIgnoreCase("y")) {
            if (choice.equalsIgnoreCase("n")) {  // trying to make a Y/N question

            }
            // get the invoice subtotal from the user
            System.out.print("Enter subtotal:   ");
            double subtotal = sc.nextDouble();

            // calculate the discount amount and total
            double discountPercent = 0;
            if (subtotal <= 100) {
                discountPercent = .1;
            } else if (subtotal <= 200) {
                discountPercent = .2;
            } else if (subtotal >= 500) {
                discountPercent = 0.25;
            }
            double discountAmount = subtotal * discountPercent;
            double total = subtotal - discountAmount;

            // display the discount amount and total
            String message = "Discount percent: " + discountPercent + "\n"
                           + "Discount amount:  " + discountAmount + "\n"
                           + "Invoice total:    " + total + "\n";            
            System.out.println(message);

            // see if the user wants to continue
            System.out.print("Continue? (y/n): ");
            choice = sc.next();
            System.out.println();
        }
    }
}