连接 Java - MySQL：不允许检索公钥

如何解决连接 Java - MySQL：不允许检索公钥

您应该将客户端选项添加到您的 MysqL- connectorallowPublicKeyRetrieval=true以允许客户端自动从服务器请求公钥。请注意，这allowPublicKeyRetrieval=True可能允许恶意代理执行 MITM 攻击以获取明文密码，因此默认情况下为 False，必须显式启用。

https://mysql-net.github.io/MySqlConnector/connection- options/

您也可以useSSL=false在将其用于测试/开发目的时尝试添加

例子：

jdbc:MysqL://localhost:3306/db?allowPublicKeyRetrieval=true&useSSL=false

解决方法

我尝试使用连接器 8.0.11 将 MySQL 数据库与 Java 连接起来。一切似乎都很好，但我得到了这个例外：

Exception in thread "main" java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed at
     com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:108) at 
     com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95) at
     com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122) at     
     com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:862) at 
     com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:444) at
     com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:230) at
     com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:226) at
     com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:438) at
     com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:146) at
     com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:119) at
     ConnectionManager.getConnection(ConnectionManager.java:28) at
     Main.main(Main.java:8)

这是我的连接管理器类：

public class ConnectionManager {

    public static final String serverTimeZone = "UTC";
    public static final String serverName = "localhost";
    public static final String databaseName ="biblioteka";
    public static final int portNumber = 3306;
    public static final String user = "anyroot";
    public static final String password = "anyroot";

    public static Connection getConnection() throws SQLException {

        MysqlDataSource dataSource = new MysqlDataSource();

        dataSource.setUseSSL( false );
        dataSource.setServerTimezone( serverTimeZone );
        dataSource.setServerName( serverName );
        dataSource.setDatabaseName( databaseName );
        dataSource.setPortNumber( portNumber );
        dataSource.setUser( user );
        dataSource.setPassword( password );

        return dataSource.getConnection();
    }
}