报错信息如下：
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]
解决方法一：
在启动类上加上@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.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);
}
}
方法二
在application.properties在添加配置
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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原文链接：https://blog.csdn.net/qq_33439525/article/details/105271088