博客内容描述了一位开发者遇到的Spring Boot应用无法成功建立到MySQL数据库的JDBC连接的问题。异常信息显示为CommunicationsException和SSLHandshakeException，提示可能的解决方案是在数据库URL中添加`createDatabaseIfNotExist=true&useSSL=false`。尽管原理未详述，但这个建议似乎能解决连接问题。
报了多个异常，没给原因，就是提示jdbc连接不上
Exception during pool initialization.
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.
Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection;
解决方案：
在url携带参数后面添加：createDatabaseIfNotExist=true&useSSL=false
原理暂时不懂，待更新
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