转载：https://blog.csdn.net/qq_25108521/article/details/60960560
exception:Failed to read candidate component class: file
org.springframework.beans.factory.BeanDefinitionStoreException: **Failed to read candidate component class: file**
Caused by: org.springframework.core.NestedIOException: ASM ClassReader failed to parse class file - probably due to a new Java class file version that isn't supported yet: file
原因是jdk1.8只支持spring4.x以上的版本，可以将jdk版本下调（spring需要jdk1.5以上的版本支持）或升级spring版本。
1、调整编译环境：
2、更改Project Facets
