有很多方法：1.用root 进入mysql后mysql>set password =password('你的密码');mysql>flush privileges;
2.使用grant语句 mysql>grant all on *.* to 'root'@'localhost' identified by '你的密码'with grant option ;mysql>flush privileges;
3.进入mysql库修改user表mysql>use mysql;mysql>update user set password=password('你的密码') where user='root'; mysql>flush privileges;
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