struts2下载点取消时Tomcat报异常

Question

描述：点击保存没有问题，当点击取消时报异常错误，请各位高手们指教啊，先谢谢啦！！！//action
public InputStream getTargetFile() throws Exception{
 ServletActionContext.getResponse().setHeader("Content-Disposition","filename="+new String(inputPath.getBytes("gb2312"),"iso-8859-1"));
      return ServletActionContext.getServletContext().getResourceAsStream("\\upload\\"+inputPath);
     
}//下载的struts配制文件
 <!-- 下载 -->
  <action name="down" class="action.DownLoadAction">
     <param name="contentType">charset="gb2312"</param>
     <param name="inputPath">中国风.rar</param>
     <result name="success" type="stream">
      <!-- 指定由getTargetFile()方法返回被下载的inputStream -->
      <param name="inputName">targetFile</param>
        <param name="contentDisposition">filename=""</param>
        <param name="buffersize">4096</param>
     </result>
  </action>//点击取消时报的异常
2009-12-27 10:25:38 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet default threw exception
java.lang.IllegalStateException
at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:407)
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:770)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:505)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

Answer 1

点取消的不触发action不就行啦？

Answer 2

public class IllegalStateException
extends RuntimeException
在非法或不适当的时间调用方法时产生的信号。换句话说，
即 Java 环境或 Java 应用程序没有处于请求操作所要求的适当状态下。 
不调用方法还报错吗

Answer 3

把这个异常catch一下不让它出来嘛。反正保存已经好了

Answer 4

我已经catch过了，但还是报异常啊

Answer 5

这是web容器生成的servlet代码中有out.write(””)，这个和JSP中调用的response.getOutputStream()产生冲突.
即Servlet规范说明，不能既调用 response.getOutputStream()，又调用response.getWriter()，无论先调用哪一个，在调用第二个时候应会抛出 IllegalStateException，因为在jsp中，out变量是通过response.getWriter得到的，在程序中既用了response.getOutputStream，又用了out变量，故出现以上错误。
解决方案：
1.在程序中添加：
out.clear();
out = pageContext.pushBody();
就可以了；2，不要在%〕〔%之间写内容包括空格和换行符
3，在页面写入图片的时候，需要flush（）
 OutputStream output=response.getOutputStream();
 output.flush();
4，在页面确定写入<meta http-equiv=”Content-Type” content=”text/html; charset=gb2312”> 

Answer 6

把这个异常catch到，存入日志就行了，这个无法避免

Answer 7

根源在tomcat会抛出ClientAbortException我提供一个解决办法如下，根据实际情况你可以再修改。=1========
<action name="down" class="action.DownLoadAction"> 
  <param name="contentType">charset="gb2312" </param> 
  <param name="inputPath">中国风.rar </param> 
  <result name="success" type="stream"> 
  <exception-mapping result="client-abort-exception" exception="org.apache.catalina.connector.ClientAbortException"></exception-mapping>
  <param name="inputName">targetFile </param> 
    <param name="contentDisposition">filename="" </param> 
    <param name="buffersize">4096 </param> 
  </result> 
</action> =2==================
<package name="default" extends="struts-default" abstract="true">
  <global-results>
    <result name="client-abort-exception">/ignore.jsp</result>
  </global-results>
</package>=3=================
新建一个空的文件，命名为ignore.jsp
如果你的容器不是tomcat，而是resin。那么resin有一个参数ignore-client-disconnect，直接设置一下即可，不需要做上述操作。祝你好运

Answer 8

网上也有很多这方面的讨论，你多sousou也能找到why，还有就是调试。我发现
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:770) 
这个代码中catch的error就是 ClientAbortExceptionstruts2正好有exception-mapping的功能。那么在下载action中把这个ClientAbortException截获，扔到一个空的result里就行了。已经我在struts1里也碰到过，当时没仔细去找问题，今天看到提问，顺便就花时间看了下，赚点分，呵呵

Answer 9

昨天刚试的时候没事后来一重起tomcat又出了新的异常能否再帮忙解决下？
//新的异常错误
2009-12-29 10:13:10 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:604)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:198)
at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:112)
at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118)
at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:178)
at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:118)
at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:77)
at org.apache.jsp.MyJsp_jsp._jspService(MyJsp_jsp.java:94)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:557)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:481)
at org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:156)
at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:362)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:266)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
2009-12-29 10:13:10 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet default threw exception
java.lang.IllegalStateException
at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:407)
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:770)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:505)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

Answer 10

这跟下载有关系吗？？at org.apache.jsp.MyJsp_jsp._jspService(MyJsp_jsp.java:94) 你在MyJsp中干了啥？ 打开了2次response.getOutputStream()。先结贴吧，有问题再说

Answer 11

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Answer 12

什么也没做啊，加上你给的内容运行就出现这个异常了MyJsp.jsp是新页面，里面什么也没

Answer 13

<result name="success" type="stream">
  <exception-mapping result="client-abort-exception" exception="org.apache.catalina.connector.ClientAbortException"> </exception-mapping>
  <param name="inputName">targetFile </param>
    <param name="contentDisposition">filename="" </param>
    <param name="buffersize">4096 </param>
  </result>这个<result>标签内部提示只能用<param>啊，<exception-mapping/>会报错，怎么回事？？

Answer 14

请看：http://zzb20081225.blog.163.com/blog/static/139636994201131922239974/
绝对有用，比上面的方法好多了，且很强大
只需要导入一个jar包，并修改一下type型和加一句result-type