解决No thread-bound request found: Are you referring to request attributes outside of an actual web...

异常信息：
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.

错误原因大致是因为主线程完成后，子线程不能获取request请求信息，包括session等导致此错误。
在网上找的一片文章参考，只要在开启新线程前添加如下，让子线程共享主线程servletRequestAttributes即可，亲测可用。

具体可参考原文：原文链接点击

ServletRequestAttributes servletRequestAttributes =(ServletRequestAttributes)RequestContextHolder.getRequestAttributes();

RequestContextHolder.setRequestAttributes(servletRequestAttributes,true);//设置子线程共享