com.mysql.cj.exceptions.UnableToConnectException: Public Key Retrieval is not allowed报错处理

在做学成在线项目时，启动项目报错：
com.mysql.cj.exceptions.UnableToConnectException: Public Key Retrieval is not allowed
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)

解决方法：
在mysql连接的url最后加上allowPublicKeyRetrieval=true。

如果加上之后还报错，把target目录删掉，重新运行即可。

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UnableToConnectException exceptions Retrieval allowed Publicunabletoconnectexception exceptions retrieval retrieval allowed mysql8 public retrieval allowed public key retrieval时报allowed方法 registration forbidden allowed public specifications exception dynamic allow unabletoconnectexception retrieval retrieval-augmented why_retrieval_beats_cramming_