參看網上的springmvc非同步支援的小例子，自己試了一下，使用ajax的請求處理方法如下：

	@RequestMapping("/response-body")
	public @ResponseBody Callable<String> responseBody(){
		return new Callable<String>() {
			@Override
			public String call() throws Exception {
				Thread.sleep(2000);
				return "Callable result";
			}
		};
	}
 

Servlet.service() for servlet [springmvc] in context with path [/SpringMVC_Demo] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: Async support must be enabled on a servlet and for all filters involved in async request processing. This is done in Java code using the Servlet API or by adding "<async-supported>true</async-supported>" to servlet and filter declarations in web.xml.] with root cause
java.lang.IllegalStateException: Async support must be enabled on a servlet and for all filters involved in async request processing. This is done in Java code using the Servlet API or by adding "<async-supported>true</async-supported>" to servlet and filter declarations in web.xml.
 

  <servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
    <!-- springmvc的非同步支援 -->
    <async-supported>true</async-supported>
  </servlet>
 

我的專案是用的以前練習時的專案，其中使用了springmvc的encoding-filter，為了驗證猜想，將filter暫時註釋掉，結果沒再出錯，說明對filter的使用也要加以非同步支援宣告。

現在在servlet和filter中也加入非同步支援，即在每個filter中加入<async-supported>true</async-supported>，再次重啟，訪問，也不會報錯了。

參考：http://www.blogjava.net/yongboy/archive/2011/01/15/346203.html

           http://wiselyman.iteye.com/blog/2215852

之後補充：專案中如果引入activemq-all.jar的包，進行springmvc的非同步訪問是會報錯的。

NoSuchMethodError: org.springframework.core.MethodParameter.getContainingClass()Ljava/lang/Class;

   網上說是jar包衝突，更換activemq的版本即可，此點未測試