JAVA-SPRING - Error java.lang.ClassNotFoundException: "com.mysql.jdbc.Driver" Upon Putting My Connection to Other Class but working on the Main

While practicing Spring framework, I want my JDBC Connection to be on external class. However, upon creating the object on my main method and calling the .connectToDB() method, I keep on getting this kind of error:

java.lang.ClassNotFoundException: "com.mysql.jdbc.Driver"

This is my code:

DBConnection.java (Class with dependencies)

package com.jrs.annotation;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import org.springframework.beans.factory.annotation.Value;

public class DBConnection {
    @Value("${mysql.driver}")
    private String driver;
    
    @Value("${mysql.url}")
    private String url;
    
    @Value("${mysql.password}")
    private String password;
    
    @Value("${mysql.username}")
    private String username;
    
    public void displayConnection(){
        System.out.println("Driver: " + this.driver + "\nURL: "+ this.url + "\nUsername" + this.username + "\nPassword" + this.password);
    }
    
    
    public void connectToDB() throws SQLException, ClassNotFoundException {
        Class.forName(this.driver);
        Connection con = DriverManager.getConnection(url, username, password);
        System.out.println("Connection has been established");
    }
}

Client.java (My class for main method)

package com.jrs.annotation;

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

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Client {

    public static void main(String[] args) throws Exception {
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        DBConnection con = context.getBean("dbconnection",DBConnection.class);
        con.displayConnection();
        con.connectToDB();
    }
}

connection_details.properties (Values for the database connection)

mysql.driver  = "com.mysql.jdbc.Driver"
mysql.url     = "jdbc:mysql://127.0.0.1:3306/school"
mysql.username= "root"
mysql.password= ""

beans.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <context:annotation-config/>
    
    <context:property-placeholder location="connection_details.properties" />
    <bean id = "dbconnection" class = "com.jrs.annotation.DBConnection">
    </bean>
</beans>

I've tried to do the connection code on my Main method and it's working. I got only that kind of error when I put it on a method from an external class and call it on my main. Is there anything that I missed to include?

Thank you.

SOLUTION: I've already found what's going wrong with this, values on the connection_details.properties doesn't need a single or double quote. Thank you for your ideas.

Correct Code for connection_details.properties

mysql.driver  = com.mysql.jdbc.Driver
mysql.url     = jdbc:mysql://127.0.0.1:3306/school
mysql.username= root
mysql.password=