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