如何将schema/其他用户添加到给java的数据库url？

String url = "jdbc:mysql://hostname:port/database?user=username&password=password";

String url = "jdbc:mysql://localhost:3306/mydatabase?user=myuser&password=mypassword";

String url = "jdbc:postgresql://hostname:port/database?user=username&password=password&currentSchema=mySchema";

String url = "jdbc:postgresql://localhost:5432/mydatabase?user=myuser&password=mypassword&currentSchema=mySchema";

String url = "jdbc:oracle:thin:@hostname:port:sid?user=username&password=password";

String url = "jdbc:oracle:thin:@localhost:1521:orcl?user=myuser&password=mypassword";

String url = "jdbc:sqlserver://hostname:port;databaseName=database;user=username;password=password";

String url = "jdbc:sqlserver://localhost:1433;databaseName=mydatabase;user=myuser;password=mypassword";

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

public class DatabaseConnector {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase?user=myuser&password=mypassword";
        try (Connection conn = DriverManager.getConnection(url)) {
            System.out.println("Connected to the database!");
        } catch (SQLException e) {
            System.err.println("Failed to connect to the database.");
            e.printStackTrace();
        }
    }
}