今天在建立spring-boot時遇到一個讀取不到application.properties的問題，正常是將此檔案放在src/main/resouces的子目錄下，但是有時候為了方便管理所以需要將位置轉移。 如下圖所示：

此圖中我是將檔案放在src/main/resouces的propertiesConfig目錄下，所以直接執行專案會找不到該檔案，此時會報以下錯誤：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.dataSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceAutoConfiguration$NonEmbeddedConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath.

所以需要修改sping執行時讀取的地址：@PropertySource("classpath:propertiesConfig/Application.properties")加上此註解就可以。此註解是載入application上的

對了，不知道為啥要在application這個類上加上@EnableAutoConfiguration這個註解