servlet3.0以后支持异步处理请求,具体是使用AsyncContext ,包装httpservletRequest以及httpservletResponse具有异步的功能,

final AsyncContext ac = request.startAsync(request, response);
  ac.setTimeout(3000);

AsyncContext 内的具有异步功能的httpservletRequest以及httpservletResponse即可,实现异步的功能,

 

 在springmvc中,需要配置web.xml,使其具有异步的功能,具体的实现是

 

<filter>
<filter-name>encodingfilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<async-supported>true</async-supported>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
  </filter>
 
 <servlet>
    <!-- 在这里的mvc 启动加载的时候  系统默认会加载web-inf下的mvc-servlet.xml -->
<servlet-name>mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
  </servlet>
 
<async-supported>true</async-supported>