多线程的注意事项和bug

　　报错：

Caused by: java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, 
or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message,
 your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or
 RequestContextFilter to expose the current request.

　　原因：引用了父线程的变量

 

 

 

参考博客：spring中开启多线程任务报错