使用ThreadLocal存储HttpServletRequest和响应

Question

  

可能重复：
  ThreadLocal to store ServletRequest and Response in servlet: what for?

我有一个servlet类，它将信息发送到某个Delegator类，后者会调用一些Business Service方法。

我需要当前的HttpServletRequest和HttpServletResponse对象到Delegator类的方法。我没有将它作为方法签名的一部分，而是考虑在servlet类的ThreadLocal变量中设置它，然后在Delegator类的方法中从ThreadLocal变量中检索它。

以下是示例代码。

//Servlet class
    public class TestServlet extends HttpServlet{        
        protected void doGet( HttpServletRequest request, HttpServletResponse response ) throws ServletException,IOException{
           Utils.setHttpServletRequest(request);
           Utils.setHttpServletResponse(response);  
        }

    }

                             //******Utils class*************
public class Utils {
public static final ThreadLocal<HttpServletRequest> servletRequest = new ThreadLocal<HttpServletRequest>();

public static final ThreadLocal<HttpServletResponse> servletResponse = new ThreadLocal<HttpServletResponse>();

    public static HttpServletRequest getHttpServletRequest(){
        return servletRequest.get();
    }

    public static HttpServletResponse getHttpServletResponse(){
        return servletResponse.get();
    }

    public static void setHttpServletRequest( HttpServletRequest request ){
        servletRequest.set( request );
    }

    public static void setHttpServletResponse( HttpServletResponse response ){
        servletResponse.set( response );
    }
}

//Delegator clas

public class TestClass{
       public void testMethod(){
          //IS THIS CORRECT?
          HttpServletRequest request=Utils.getHttpServletRequest();
        }

}

您能否建议这种方法是否存在任何可能的问题？