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Não estou conseguindo fazer a conexão com o banco de dados

Minha classe está assim:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class Teste {

    public static void main(String[] args) throws SQLException {
        Connection conexao = DriverManager.getConnection("jdbc:mysql://localhost/loja_virtual?useTimeZone=true&serverTimeZone=UTC", "root", "root");

        System.out.println("Fechando conexão.");
        conexao.close();
    }
}

Depois que eu executo, o resultado é este:

Exception in thread "main" com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
    at mysql.connector.java@8.0.17/com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
    at mysql.connector.java@8.0.17/com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
    at mysql.connector.java@8.0.17/com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:827)
    at mysql.connector.java@8.0.17/com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:447)
    at mysql.connector.java@8.0.17/com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:237)
    at mysql.connector.java@8.0.17/com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
    at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:677)
    at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:228)
    at Teste.main(Teste.java:8)
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
    at mysql.connector.java@8.0.17/com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
    at mysql.connector.java@8.0.17/com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
    at mysql.connector.java@8.0.17/com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
    at mysql.connector.java@8.0.17/com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
    at mysql.connector.java@8.0.17/com.mysql.cj.protocol.a.NativeProtocol.negotiateSSLConnection(NativeProtocol.java:340)
    at mysql.connector.java@8.0.17/com.mysql.cj.protocol.a.NativeAuthenticationProvider.negotiateSSLConnection(NativeAuthenticationProvider.java:777)
    at mysql.connector.java@8.0.17/com.mysql.cj.protocol.a.NativeAuthenticationProvider.proceedHandshakeWithPluggableAuthentication(NativeAuthenticationProvider.java:486)
    at mysql.connector.java@8.0.17/com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:202)
    ... 10 more
Caused by: javax.net.ssl.SSLHandshakeException: NotBefore: Fri Nov 27 12:44:25 BRT 2020
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:131)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:353)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:296)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:291)
    at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:654)
    at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.onCertificate(CertificateMessage.java:473)
    at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.consume(CertificateMessage.java:369)
    at java.base/sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:392)
    at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:444)
    at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:422)
    at java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:183)
    at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:171)
    at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1359)
    at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1268)
    at java.base/sun.security.ssl

Eu fiz o teste no Command Line Client para saber se o meu usuário e a senha estavam certos e está ok.

Desde já, agradeço pela ajuda.

1 resposta
solução!

Eu alterei a forma de "useTimezone" para "useTimeZone" porque achei que era isso que estava dando problema, mas depois de rodar o código em outro notebook e tudo funcionar normalmente, eu vi que não era, então desfiz a alteração.

Aparentemente, o que estava dando problema era a hora que estava configurada no primeiro notebook que eu rodei o código, depois de eu alterar as variáveis "useTimeZone" para "useTimezone" e "serverTimeZone" para "serverTimezone" e também mudar a hora do notebook, o código funcionou normalmente.

Então agora está tudo funcionando.