navicat 提示“1045 access denied for user 'root'@'localhost' ”解决方法

cmd命令行切换到MySQLbin目录下,mysqld --skip_grant_tables;//跳过权限验证。登录mysql后mysql -u root -p;         //mysql首次登录默认密码为空。方法一:mysql>updatemysql.user set authentication_string=password('root') where user='root';mysql> flushprivileges;mysql> quit; 方法二：登录mysql后，mysql>alteruser 'root'@'localhost' identified by 'root';  方法三:登录mysql后mysql>setpassword for 'root'@'localhost'=password('root');