spring mvc 支持异步配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>mvc</display-name>
  

==================web.xml======================================= 
 <!-- The front controller of this Spring Web application, responsible for handling all application requests -->
	<servlet>
		<servlet-name>springDispatcherServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:springmvc.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
		<async-supported>true</async-supported>--------------------------配置支持异步
	</servlet>

	<!-- Map all requests to the DispatcherServlet for handling -->
	<servlet-mapping>
		<servlet-name>springDispatcherServlet</servlet-name>
		<url-pattern>/</url-pattern>
		
	</servlet-mapping>
</web-app>

======================sevlet.xml============================

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
    <context:component-scan base-package="myWeb"></context:component-scan>
    <mvc:annotation-driven>
    <mvc:async-support default-timeout="5000"/>-------------------------配置异步
    
    </mvc:annotation-driven>
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     <property name="prefix" value="/"></property>
      <property name="suffix" value=".jsp"></property>
    </bean>
    <mvc:resources mapping="/**" location="/css/" cache-period="31556926"/>
    
    
</beans>

================controller===============================

@RequestMapping(value="/lotteryQuery")
 Callable<String> lotteryQuery() {
  System.out.println("run in lotteryQuery");
  Callable<String> asyncTask = new Callable<String>() {
   @Override
         public String call() throws Exception {
             Thread.sleep(4000);
             return "success";
         }
  };
  
  return asyncTask;
 }