com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.解决办法：配置文件加上&useSSL=false
spring:
datasource:
username: root
password: rendudata
url: jdbc:mysql://127.0.0.1:3306/consulting_session_db?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8
driver-class-name: com.mysql.cj.jdbc.Driver文章来源地址https://www.toymoban.com/news/detail-561896.html
文章来源：https://www.toymoban.com/news/detail-561896.html
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