java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property.
spring.datasource.url=...
+
?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
指定客户端字符集。
服务器字符集、数据库、表、字段 都可以指定 字符集, show status 可以看吧。检查下。