启动springboot时候的错误信息：
An attempt was made to call the method org.springframework.boot.autoconfigure.session.RedisSessionConfiguration$SpringBootRedisHttpSessionConfiguration.setCleanupCron(Ljava/lang/String;)V but it does not exist. Its class, org.springframework.boot.autoconfigure.session.RedisSessionConfiguration$SpringBootRedisHttpSessionConfiguration, is available from the following locations:
jar:file:/C:/Users/wwty/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.0.5.RELEASE/spring-boot-autoconfigure-2.0.5.RELEASE.jar!/org/springframework/boot/autoconfigure/session/RedisSessionConfiguration$SpringBootRedisHttpSessionConfiguration.class
It was loaded from the following location:
file:/C:/Users/wwty/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.0.5.RELEASE/spring-boot-autoconfigure-2.0.5.RELEASE.jar
Action:
Correct the classpath of your application so that it contains a single, compatible version of org.springframework.boot.autoconfigure.session.RedisSessionConfiguration$SpringBootRedisHttpSessionConfiguration
这个错误需要在 配置文件中添加：
spring.session.store-type = none
session store type使用来存放session的存储方式，目前Spring boot中只支持Redis方式。 由于本应用暂无需将session放入redis的需求，故这里就可以将session store type设置为none.
额， 莫名其妙、
