简介

有时候我们想自己动态的初始化数据库连接池，但是springboot 的@SpringBootApplication注解会自动去初始化数据库连接池，不配置的话会启动失败，如下提示

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$Dbcp2.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.commons.dbcp2.BasicDataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
INFO  - Unregistering JMX-exposed beans on shutdown

解决方案

办法就是排除自动初始化的类

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
public class Application implements CommandLineRunner {
...
}

加上这么一句 (exclude = {DataSourceAutoConfiguration.class})，就可以跳过数据库的自动初始化，自己为所欲为了

引用

https://www.cnblogs.com/zhaojinxin/p/7641978.html
https://www.cntofu.com/book/79/2-Spring4-快速入门.md