在mysql命令行中执行
SET PASSWORD FOR ‘root‘@‘localhost‘ = PASSWORD(‘123456‘);
GRANT ALL PRIVILEGES ON *.* TO ‘root‘ @‘%‘ IDENTIFIED BY ‘123456‘ WITH GRANT OPTION;
flush privileges;
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1045 access denied for user 'root'@'localhost' using password yes
原文：http://12592428.blog.51cto.com/12582428/1906940