ajax异常

/**
* 获得指标的历次对比曲线
* @return
* @throws IOException
* @throws Exception
*/
public String getCurve() throws IOException {
List<QuotaRecord> quotaRecordList=reportDao.getQuotaRecord(personIdNo,itemQuotaCode);
JSONArray jsonArray=JSONArray.fromObject(quotaRecordList);
HttpServletResponse response = (HttpServletResponse) ActionContext.getContext().get(ServletActionContext.HTTP_RESPONSE);
response.setContentType("text/html;charset=utf-8");
response.setCharacterEncoding("utf-8");
response.setHeader("Charset","utf-8");
response.setHeader("Cache-Control","no-cache");
PrintWriter out = response.getWriter();
//输出到客户端json对象
out.write(jsonArray.toString());
out.flush();
out.close();
return "success";

}

九月 23,2016 9:49:44 上午 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [default] in context with path [/SupMisMp] threw exception
java.lang.IllegalStateException: Cannot call sendError() after the response has been committed
at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:450)
at org.apache.struts2.dispatcher.dispatcher.sendError(dispatcher.java:771)
at org.apache.struts2.dispatcher.dispatcher.serviceAction(dispatcher.java:506)
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.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:722)

将return "success"改为return null

returnSUCCESS;这代表着转向，需要response的，而response.getoutputStream();在out.write(jsonArray.toString());时已经committed，不能再response一次，当把returnSUCCESS;改成returnnull;所有问题都解决！至于怎样是committed，推荐看看这里：http://jorton468.blog.163.com/blog/static/72588135201102441617287/

原文地址：https://www.jb51.cc/ajax/161817.html