SpringMvc的controller是singleton的(非线程安全的) - lvyuanj的专栏 - CSDN博客
https://blog.csdn.net/lvyuanj/article/details/51229324
Spring MVC Controller单例陷阱 - VinoZhu - 博客园
https://www.cnblogs.com/vinozly/p/5043311.html
spring的controller默认是单例还是多例 - 00u0o - CSDN博客
https://blog.csdn.net/q1512451239/article/details/53122687
springMVC controller的线程同步问题 - 向向向阳 - 博客园
http://www.cnblogs.com/zipei/p/6027459.html
https://bbs.csdn.net/topics/390751521?list=lz
https://bbs.csdn.net/topics/390751521?list=lz
spring aop 不能加在controller上,能加在service上 - 蜂蜂的专栏 - CSDN博客
https://blog.csdn.net/shi_longyan/article/details/70917447