JDBC鏈接MySQL8.0.13的記錄

• MySQL版本8.0開始jdbc鏈接數據庫的驅動變動：com.mysql.cj.jdbc.Driver
• 同時密碼存儲方式改變爲 caching_sha2_password
• 須要修改MySQL配置文件中的default_authentication_plugin爲mysql_native_password（不使用）
• 修改原有帳戶的加密方式：ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '新密碼';

若是報錯Unknown system variable 'query_cache_size'，則爲jdbc版本不一致致使，更換jdbc驅動版本便可

出現警告：WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification

• 只須要在數據庫url後加上：useSSL=false 該問題我沒有遇到

• 問題：java.sql.SQLException: The server time zone value

  • 時區錯誤，在url後添加：serverTimezone=UTC

mybatis的配置文件中直接使用&字符會出錯，需用&來代替