解决办法，
再大dao的实现类上添加注解：
@Transactional(readOnly = false )
不让它只读就行了
spring整合之后运行报什么只读错误。Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.
原文：https://www.cnblogs.com/shiwanming/p/9746737.html
