谁能解释一下这个错误??解决马上给分!!!

[磨砺营马剑威]

servlet获取输出流,向客户端输出数据:
OutputStream out = response.getOutputStream();
out.write(data);
//.............

报以下错误:

2005-12-05 16:22:45,000 ERROR [STDERR] java.lang.IllegalStateException: getWriter() has already been called for this response
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.coyote.tomcat4.CoyoteResponse.getOutputStream(CoyoteResponse.java:586)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.coyote.tomcat4.CoyoteResponseFacade.getOutputStream(CoyoteResponseFacade.java:158)
2005-12-05 16:22:45,000 ERROR [STDERR] at com.xjt.servlets.search.SearchResultServlet.sendData(SearchResultServlet.java:108)
2005-12-05 16:22:45,000 ERROR [STDERR] at com.xjt.servlets.search.SearchResultServlet.doPost(SearchResultServlet.java:51)
2005-12-05 16:22:45,000 ERROR [STDERR] at com.xjt.servlets.search.SearchServlet.doPost(SearchServlet.java:186)
2005-12-05 16:22:45,000 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
2005-12-05 16:22:45,000 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
2005-12-05 16:22:45,000 ERROR [STDERR] at com.xjt.servlets.admin.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:46)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
2005-12-05 16:22:45,000 ERROR [STDERR] at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:509)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:432)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
2005-12-05 16:22:45,015 ERROR [STDERR] at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
2005-12-05 16:22:45,015 ERROR [STDERR] at java.lang.Thread.run(Thread.java:534)

[hamlet3145]

重复调用输出流


是静安寺不是道明寺，是源程序不是言承旭；是在静安寺写源程序，不是在流星花园看F4。

[磨砺营马剑威]

那要怎样避免呢,为什么有时候就不会报错呢,谢谢!

[jxdn_yang]

jsp里面默认就有out对象
然后你的javabean里面又调用一次getOutputStream()
这样这个方法就被调用两次了

[jxdn_yang]

是在静安寺写源程
/////////////
和尚程序员?编佛教信息管理系统或是香火出入帐管理??

[磨砺营马剑威]

楼上的朋友,那应该怎么做呢

[li_d_s]

呵呵，静安寺是好大一块地方的名称，就好像中山陵并不只是顶上那个墓一样的