The error message is as follows:

2020-04-02 15:25:15.549 WARN 4360 — [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization – cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘dataSource’ defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method ‘dataSource’ threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
2020-04-02 15:25:15.549 INFO 4360 — [ main] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
2020-04-02 15:25:15.554 INFO 4360 — [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]

Solution:

Method 1:

Add @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class}) to the startup class

package com.example.securitycore;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;

@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
@SpringBootApplication
public class SecurityCoreApplication {

public static void main(String[] args) {
SpringApplication.run(SecurityCoreApplication.class, args);
}

}

Method 2:

Add configuration in application.properties

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/security_demo?characterEncoding=utf-8
spring.datasource.data-username=root
spring .datasource.data-password=root

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