Lỗi không kết nối được với sql khi dùng java

[Huy_Do_Duc (Huy Đỗ Đức)]

package sample.Controllers;

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

public class ConnectDatabase {
    public static String jdbcURL = "jdbc:mysql://localhost:3306/dict?autoReconnect=true&useSSL=false";
    public static String username = "root";
    public static String password = "01693204793";

    public static Connection getConnection(String dbURL, String userName,
                                           String password) {
        Connection conn = null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            conn = DriverManager.getConnection(dbURL, userName, password);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return conn;
    }
}

Nó báo lỗi thế này ạ

java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
	at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:898)
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:823)
	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 java.sql/java.sql.DriverManager.getConnection(DriverManager.java:681)
	at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:229)
	at sample.Controllers.ConnectDatabase.getConnection(ConnectDatabase.java:16)

[HanQuaNhanh (Hàn Quá Nhanh)]

Bạn thử thay chuỗi URL thành như thế này xem có chạy được không nhé:

String URL= "jdbc:mysql://localhost:3306/dict?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=CONVERT_TO_NULL&serverTimezone=GMT";