Error 1045 (28000) access denied for user 'root' @ 'localhost' solution

The origin of things

The night before yesterday was fine , The next day, I turned on my computer and was about to start writing garbage code , It is found that the project startup report is wrong , Look at the , It is found that the database cannot be connected , I looked stunned , Only on the csdn Search the article of the boss , Finally, the problem was solved . The following process is the process of solving the problems that occur when I execute the boss tutorial . I am mysql Version as follows ：mysql-8.0.27-winx64.

operation

One 、 New first cmd window , close mysql service

Two 、 Create a second cmd window （ Administrator permission open ）, Skip permission validation

mysqld --console --skip-grant-tables --shared-memory 

3、 ... and 、 Create a third cmd window （ Administrator permission open ）, No password to enter mysql, And clear the password

notice Enter passowrd Love directly and ignore , Just go back

update user set authentication_string='' where user='root';

Four 、 Close the front cmd window （ Administrator permission open ）, No password to enter mysql, And reset the password

Everything goes well ahead , When I want to change my password , I made a mistake again , Say my password is too simple , Make fun of ,“12345678” It's simple , Forget it , It can only be modified mysql The rules of .

Open configuration

Find out policy It's medium

Then change it to low-level

set global validate_password.policy=0;

Re execution mysql> show variables like “%validate%”; It is found that the modification is complete

Finally, you can change the password , Open up

Ah, this , An error again , My mind is broken . Finally, after checking other information , Found a new modification method .

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '12345678';

After the modification, you can log in normally

Reference blog

https://blog.csdn.net/m0_46278037/article/details/113923726spm=1001.2014.3001.5502