连接Java-MySql：不允许公钥检索

Question

我尝试使用连接器8.0.11将MySql数据库与Java连接。一切似乎都还可以，但是我有一个例外：

线程“主”中的异常java.sql.SQLNonTransientConnectionException： 不允许公共密钥检索

堆栈跟踪：

    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)

连接器管理器：

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();
    }
}

Answer 1

您应该将客户端选项添加到mysql-
connector中，allowPublicKeyRetrieval=true以允许客户端自动从服务器请求公共密钥。请注意，这AllowPublicKeyRetrieval=True可能允许恶意代理执行MITM攻击以获取纯文本密码，因此默认情况下为False，必须明确启用它。

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：

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