Spring-boot 启动时碰到的错误:

Your ApplicationContext is unlikely to start due to a @ComponentScan of the default package

  WARN 320 --- [lication.main()] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: URL [jar:file:/C:/Documents%20and%20Settings/Administr

ator/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.2.5.RELEASE/spring-boot-autoconfigure-1.2.5.RELEASE.jar!/org/springframework/boot/autoc

onfigure/jdbc/DataSourceAutoConfiguration$JdbcTemplateConfiguration.class]; nested exception is java.lang.IllegalStateException: Could not evaluate condition on

 org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$JdbcTemplateConfiguration due to internal class not found. This can happen if you are @

ComponentScanning a springframework package (e.g. if you put a @ComponentScan in the default package by mistake)

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解决方法

查了半天终于才stack overflow上看到了解决方案，链接如下：stack overflow
是因为application.java 文件不能直接放在main/java文件夹下，必须要建一个包把他放进去