mysql could not create connection_mysql8.0 Could not create connection to database server.解决办法...

解决win10下MySQL 8.0登录Access denied for user 'root'@'localhost' (using password: YES)的问题

解决办法：重新设置密码

mysql 8.0以下：

update mysql.user set authentication_string="123456" where user="root";

mysql 8.0以上：

alter user 'root'@'localhost'IDENTIFIED BY '123456';

同时mysql8.0需要更换pom和驱动。

.pom文件换mysql-connect-jar

mysql

mysql-connector-java

8.0.11

datasource:

driverClassName: com.mysql.cj.jdbc.driver

url: jdbc:mysql://localhost:3306/mcms?autoReconnect=true&useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=true&allowPublicKeyRetrieval=true

username: root

password: tree0907pw

filters: wall,mergeStat

type: com.alibaba.druid.pool.DruidDataSource

解决The server time zone value '�й��׼ʱ��' is unrecognized or represents more than one time zone问题

解决办法：

根据提示需要在配置数据库的连接信息中，在MySQL的URL后面加上“?serverTimezone=UTC” ，如下所示：

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?serverTimezone=UTC

MySQL 8.0 Public Key Retrieval is not allowed 错误的解决方法

在使用 MySQL 8.0 提示 com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Public Key Retrieval is not allowed

最简单的解决方法是在连接后面添加 allowPublicKeyRetrieval=true

文档中(https://mysql-net.github.io/MySqlConnector/connection-options/)给出的解释是：

如果用户使用了 sha256_password 认证，密码在传输过程中必须使用 TLS 协议保护，但是如果 RSA 公钥不可用，可以使用服务器提供的公钥；可以在连接中通过 ServerRSAPublicKeyFile 指定服务器的 RSA 公钥，或者AllowPublicKeyRetrieval=True参数以允许客户端从服务器获取公钥；但是需要注意的是 AllowPublicKeyRetrieval=True可能会导致恶意的代理通过中间人攻击(MITM)获取到明文密码，所以默认是关闭的，必须显式开启

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