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springMVC项目异步处理请求的错误Async support must be enabled on a servlet and for all filters involved in async(一)

2014-11-23 21:31:17 · 作者: · 浏览: 11
标签: springMVC 项目 异步 处理 请求 错误 Async support must enabled servlet and for all filters involved async 
 
 
从github上down下来一个项目，springMVC-chat。作者全是用的注解，也就是零配置。
 
 
这可苦了我，经过千辛万苦，最终集成到现在的项目中有一点样子了，结果报出来下面的错误。红色部分。解决方法为，在web.xml中也就是springMVC的总配置文件中加上一句话：
 
 

  
   true
  
 
 
 
这句话的位置一定要放正确，否则，一切都是徒劳。至于配置spring异步支持（其实是配置servlet异步支持）的放置位置见下图。






 
 
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在
 五月 16, 2014 4:30:59 下午 Z  http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">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"
 
  true
 " 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 "
 
  true
 " to servlet and filter declarations in web.xml.
 
 at org.springframework.util.Assert.state(Assert.java:385)
 
 at org.springframework.web.context.request.async.StandardServletAsyncWebRequest.startAsync(StandardServletAsyncWebRequest.java:104)
 
 at org.springframework.web.context.request.async.WebAsyncManager.startAsyncProcessing(WebAsyncManager.java:431)
 
 at org.springframework.web.context.request.async.WebAsyncManager.startDeferredResultProcessing(WebAsyncManager.java:409)
 
 at org.springframework.web.servlet.mvc.method.annotation.DeferredResultMethodReturnValueHandler.handleReturnValue(DeferredResultMethodReturnValueHandler.java:51)
 
 at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:71)
 
 at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:122)
 
 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
 
 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)
 
 at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
 
 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
 
 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
 
 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
 
 at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
 
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
 
 at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
 
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
 
 at org.apache.catalina.core.ApplicationFil