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我正在使用 struts2 导出一个 excel 文件。较小的文件可以正常工作。文件较大时出现以下错误。为什么我会收到此错误?文件的大小是否太大?

2012-12-01 09:51:29.689::WARN:  Committed before 500 Unable to show problem report: java.lang.IllegalStateException: STREAM
2012-12-01 09:51:29.690::WARN:  /strutsDemo/process/excel: 
java.lang.IllegalStateException: Committed
    at org.mortbay.jetty.Response.resetBuffer(Response.java:853)
    at org.mortbay.jetty.Response.reset(Response.java:832)
    at org.mortbay.jetty.Response.sendError(Response.java:220)
    at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:801)
    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:519)
    at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1041)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:354)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:226)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:627)
    at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:149)
    at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:123)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:141)
    at org.mortbay.jetty.Server.handle(Server.java:269)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:430)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:687)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:492)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:199)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:339)
    at org.mortbay.jetty.nio.HttpChannelEndPoint.run(HttpChannelEndPoint.java:270)
    at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)
2012-12-01 09:51:29.691::WARN:  /strutsDemo/file/export
java.lang.IllegalStateException: Committed
    at org.mortbay.jetty.Response.resetBuffer(Response.java:853)
    at org.mortbay.jetty.Response.reset(Response.java:832)
    at org.mortbay.jetty.Response.sendError(Response.java:220)
    at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:801)
    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:519)
    at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1041)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:354)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:226)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:627)
    at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:149)
    at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:123)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:141)
    at org.mortbay.jetty.Server.handle(Server.java:269)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:430)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:687)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:492)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:199)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:339)
    at org.mortbay.jetty.nio.HttpChannelEndPoint.run(HttpChannelEndPoint.java:270)
    at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)

这是我的动作配置:

  <result name="success" type="stream">
    <param name="contentType">application/vnd.ms-excel</param>
    <param name="inputName">excelStream</param>
    <param name="contentDisposition">attachment;fileName="${fileName}"</param>
    <param name="bufferSize">2048</param>
  </result>
  <result name="invalid.token">/error.jsp</result>
</action>
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1 回答 1

1

看起来您的代码开始编写 Excel 文件(返回给客户端),中途完成并遇到了某种错误。到那时,返回并给出 500 HTTP 错误响应代码已经太晚了。您的问题中不包含错误的详细信息。(可能是客户端挂了,响应提交了两次,应用程序代码抛出异常等)如果你调试你的应用程序并在抛出任何异常时中断,你有什么发现吗?

您还可以尝试更大的缓冲区大小,看看会发生什么。(4k,16k,更多?)这告诉系统在开始将流渲染回客户端之前保持更长时间。因此,您的实际问题可能会浮出水面。

于 2014-06-13T21:37:31.800 回答