MySQL 8.0 Public Key Retrieval is not allowed 错误的解决方法

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最近发现tomcat启动配置mysql8.0的数据库报错如下：

Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Public Key Retrieval is not allowed)
	at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549)
	at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388)
	at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
	at org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider.getConnection(InjectedDataSourceConnectionProvider.java:71)
	at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
	... 60 more
Caused by: java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:828)
	at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:448)
	at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:241)
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198)
	at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
	at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582)
	at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556)
	at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545)
	... 64 more

最简单的解决方法是在连接后面添加 allowPublicKeyRetrieval=true

 allowPublicKeyRetrieval=true

 参考：

MySQL 8.0 Public Key Retrieval is not allowed 错误的解决方法_啦啦啦啦 la-CSDN博客在使用 MySQL 8.0 时重启应用后提示 com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Public Key Retrieval is not allowed 没有仔细研究到底是什么问题，最简单的解决方法是在连接后面添加 allowPublicKeyRetrieval=true...https://blog.csdn.net/u013360850/article/details/80373604

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