com.mysql.cj.jdbc.Driver和serverTimezone=GMT%2B8 数据库的配置

spring:
messages:
encoding: UTF-8
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://172.16.17.103:3306/declaration?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: root

新的改变

spring:
messages:
encoding: UTF-8
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://172.16.17.103:3306/declaration?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: root

serverTimezone设定

serverTimezone=GMT%2B8

错误消失