java.sql.SQLException：没有找到适合“jdbc:sqlite:db//untitled.db4661215409ABB4”的驱动程序

Question

有3个类（Connection Manager，JdbcRunner，PropertiesUtil），1个application.property属性文件（位于properties文件夹中），sqlite驱动在maven中有一个依赖，为什么他看不到驱动写的，虽然依赖是连接的行家！

项目结构

maven 依赖 sqlite-jdbc

 <dependency>
        <groupId>org.xerial</groupId>
        <artifactId>sqlite-jdbc</artifactId>
        <version>3.39.3.0</version>
    </dependency>

文件 application.properties

db.url="jdbc:sqlite:db//untitled.db"

class PropertiesUtil

    package db;

import java.io.IOException;
import java.util.Properties;

/**
 * the class works with properties files
 * application.properties
 */
public final class PropertiesUtil {

    private static final Properties PROPERTIES = new Properties();

    /**
     * processes only once when our class is loaded into memory for the first time
     */
    static {
        loadProperties();
    }

    /**
     * returns a key value from our associative array
     */
    public static String get(String key){
        return PROPERTIES.getProperty(key);
    }

    /**
     * reads our application.properties file from our classpath
     */
    private static void loadProperties() {
        try (var inputStream = PropertiesUtil.class.getClassLoader().getResourceAsStream("application.properties")) {
            PROPERTIES.load(inputStream);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }


private PropertiesUtil() {

}

}

class 连接管理器

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

public class ConnectionManager {


    private static final String URL_KEY = "db.url";

    static {
        try {
            loadDriver();
        } catch (NoSuchMethodException e) {
            throw new RuntimeException(e);
        }
    }

    public ConnectionManager() {
    }

    public static Connection open() throws NoSuchMethodException{
        try {
            return DriverManager.getConnection(
                    PropertiesUtil.get(URL_KEY)
            );
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }

    private static void loadDriver() throws NoSuchMethodException {
        try {
            Class.forName("org.sqlite.JDBC");
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
    }
}

class JdbcRunner

package db;

import java.lang.reflect.InvocationTargetException;
import java.sql.Driver;
import java.sql.SQLException;

public class JdbcRunner {
    public static void main(String[] args) throws ClassNotFoundException, InvocationTargetException, InstantiationException, IllegalAccessException {
        Class<Driver> driverClass = Driver.class;
        try (var connection = ConnectionManager.open()) {
            System.out.println(connection.getTransactionIsolation());
        } catch (SQLException | NoSuchMethodException e) {
            throw new RuntimeException(e);
        }
    }
}

错误：

    Exception in thread "main" java.lang.RuntimeException: java.sql.SQLException: No suitable driver found for db.url
    at db.ConnectionManager.open(ConnectionManager.java:34)
    at db.JdbcRunner.main(JdbcRunner.java:10)
Caused by: java.sql.SQLException: No suitable driver found for db.url
    at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:702)
    at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:251)
    at db.ConnectionManager.open(ConnectionManager.java:30)
    ... 1 more