8.0 以上版本 mySQL数据库导致的命令行可连接，NaviCat不可连接的问题

 错误代码: client does not support authentication

原因： 没有开启Mysql的远程连接配置

解决办法:

　　1 使用命令行进入数据库

C:Userswushaopei>mysql -u root -p
Enter password: ****

　　2 选着数据库  mysql   --> user mysql

mysql> use mysql;
Database changed
mysql> show tables;
+---------------------------+
| Tables_in_mysql           |
+---------------------------+
| columns_priv              |
| component                 |
| db                        |
| default_roles             |
| engine_cost               |
| func                      |
| general_log               |
| global_grants             |
| gtid_executed             |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| innodb_index_stats        |
| innodb_table_stats        |
| password_history          |
| plugin                    |
| procs_priv                |
| proxies_priv              |
| role_edges                |
| server_cost               |
| servers                   |
| slave_master_info         |
| slave_relay_log_info      |
| slave_worker_info         |
| slow_log                  |
| tables_priv               |
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
| user                      |
+---------------------------+
33 rows in set (0.00 sec)

　　3 alter user 'root'@'localhost' identified with mysql_native_password by 'root'; 

mysql> alter user 'root'@'localhost' identified with mysql_native_password by 'root';
Query OK, 0 rows affected (0.01 sec)

　　4 flush privileges; 

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)