数据库连接异常
1045 Access denied for user 'root'@'localhost' (using password:YES)
这种问题的本质是用户密码出现错误
解决方案
1.找到MySQL安装路径下的my.ini文件
在mysqld这个位置，添加skip-grant-tables
skip-grant-tables作为启动参数的作用：MYSQL服务器不加载权限判断，任何用户都能访问数据库。启用这个参数之后，数据库的安全性会降低。
3.使用mysql命令修改
修改完成后，记得删除skip-grant-tables
Windows PowerShell
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PS C:\Windows\system32> mysql -u root -p
Enter password:#这个地方直接回车
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.5.40 MySQL Community Server (GPL)
Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use mysql
Database changed
mysql> update user set password=password("root") where user="root";
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3 Changed: 3 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> select user,host,password from user;
+------+-----------+-------------------------------------------+
| user | host | password |
+------+-----------+-------------------------------------------+
| root | localhost | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| root | 127.0.0.1 | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| root | ::1 | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
| | localhost | |
+------+-----------+-------------------------------------------+
4 rows in set (0.00 sec)
mysql>