我知道的有三种原因
1.权限不够：
解决办法：
执行查询
GRANT ALL PRIVILEGES ON 数据库名.* TO root@'%' IDENTIFIED BY '密码' WITH GRANT OPTION;
2.连接数据库的配置文件，某个属性后面多了个空格
3.服务器可能同时运行了两个项目冲突了
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Caused by: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
[Spring MVC - 2A] - java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
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java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)解决方法
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: NO)
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES) 解决办法
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)解决方案
技术笔记1：java.sql.SQLException: Access denied for user 'root'@'localhost' (using password）
数据库异常 ：java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: NO)报错