IDEA连接Mysql数据库报错：“The last packet sent successfully to the server was 0 milliseconds ago.”

今天IDEA使用druid连接Mysql数据库报错，MySQL版本5.7.34，druid-spring-boot-starter版本1.1.13。更新druid版本到最新1.2.6也没用。

“The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.”

“No appropriate protocol (protocol is disabled or cipher suites are inappropriate)”

2021-11-26 22:28:24.499 ERROR 9352 --- [eate-1043576110] com.alibaba.druid.pool.DruidDataSource   : create connection SQLException, url: jdbc:mysql://192.168.157.131:3306/uxue_cms?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8, errorCode 0, state 08S01

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.
	at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:827)
	at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:447)
	at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:237)
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:156)
	at com.alibaba.druid.filter.FilterAdapter.connection_connect(FilterAdapter.java:786)
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:150)
	at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:218)
	at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:150)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1572)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1636)
	at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2550)
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: 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.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
	at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
	at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:340)
	at com.mysql.cj.protocol.a.NativeAuthenticationProvider.negotiateSSLConnection(NativeAuthenticationProvider.java:777)
	at com.mysql.cj.protocol.a.NativeAuthenticationProvider.proceedHandshakeWithPluggableAuthentication(NativeAuthenticationProvider.java:486)
	at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:202)
	at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1348)
	at com.mysql.cj.NativeSession.connect(NativeSession.java:163)
	at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:947)
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:817)
	... 11 common frames omitted
Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
	at sun.security.ssl.HandshakeContext.(HandshakeContext.java:171)
	at sun.security.ssl.ClientHandshakeContext.(ClientHandshakeContext.java:101)
	at sun.security.ssl.TransportContext.kickstart(TransportContext.java:238)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:394)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:373)
	at com.mysql.cj.protocol.ExportControlled.performTlsHandshake(ExportControlled.java:316)
	at com.mysql.cj.protocol.StandardSocketFactory.performTlsHandshake(StandardSocketFactory.java:188)
	at com.mysql.cj.protocol.a.NativeSocketConnection.performTlsHandshake(NativeSocketConnection.java:99)
	at com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:331)
	... 18 common frames omitted

但是同时使用SQLyog以及IDEA本身的数据库连接却没有问题，网上搜了下，发现在只要在url后面加上

&useSSL=false

就可以解决，可能是版本冲突。

至于网上的另一个解决方案：将MySQL的连接回收时间在mysqld.cnf配置文件里从默认的8h改为1天：

wait_timeout=86400

我测试了无效果。