spring：No thread-bound request found

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在 Spring中使用 多线程中， 应注意  新起的线程是不能直接访问主线程的生命周期结束的变量

比如在 在 web应用中 在新起的线程中使用 HttpServletRequest ， 会报出 IllegalStateException 的异常， 需要在使用 Request 的地方捕获异常， 或者把Request的对象传递到新起的线程里面

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.
	at org.springframework.web.context.request.RequestContextHolder.currentRequestAttributes(RequestContextHolder.java:131)
	at org.springframework.web.context.support.WebApplicationContextUtils.currentRequestAttributes(WebApplicationContextUtils.java:309)
	at org.springframework.web.context.support.WebApplicationContextUtils.access$400(WebApplicationContextUtils.java:64)
	at org.springframework.web.context.support.WebApplicationContextUtils$RequestObjectFactory.getObject(WebApplicationContextUtils.java:325)
	at org.springframework.web.context.support.WebApplicationContextUtils$RequestObjectFactory.getObject(WebApplicationContextUtils.java:320)
	at org.springframework.beans.factory.support.AutowireUtils$ObjectFactoryDelegatingInvocationHandler.invoke(AutowireUtils.java:307)
	at com.sun.proxy.$Proxy172.getHeader(Unknown Source)