![ERROR [RMI TCP Connection(3)-127.0.0.1] - init datasource error](https://image.shishitao.com:8440/aHR0cHM6Ly9ia3FzaW1nLmlrYWZhbi5jb20vdXBsb2FkL2NoYXRncHQtcy5wbmc%2FIQ%3D%3D.png?!?w=700&webp=1 "ERROR [RMI TCP Connection(3)-127.0.0.1] - init datasource error")
运行报错
ERROR [RMI TCP Connection(3)-127.0.0.1] - init datasource error, url: jdbc:mysql://localhost:3366/sm?useUnicode=true&characterEncoding=utf8
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Last packet sent to the server was 0 ms ago.
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.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
解决方法：把端口改一下，端口问题
jdbc:mysql://localhost:3306/sm?useUnicode=true&characterEncoding=utf8