jjava.lang.IllegalStateException: Cannot forward after response has been committed

at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:312)

at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)

at com.sxt.hotel.meeting.web.servlet.admin.AddCMeetServlet.doPost(AddCMeetServlet.java:80)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:643)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)

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.StandardWrapperValve.invoke(StandardWrapperValve.java:233)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)

at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:876)

at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:612)

at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1777)

at java.lang.Thread.run(Thread.java:722)

public void doPost(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {

		try {

			........一个大字(略)

			/**

			 * 6. 成功之后，将成功信息保存在request中

			 */

			request.setAttribute("msg", "添加成功");

			request.getRequestDispatcher(

					"/adminjsps/admin/dailyfix/meetting/addcategories.jsp")

					.forward(request, response);

		} catch (Exception e) {

			if (e instanceof FileSizeLimitExceededException) {

				request.setAttribute("msg", "上传文件的大小超出了50kb");

				request.getRequestDispatcher(

						"/adminjsps/admin/dailyfix/meetting/addcategories.jsp")

						.forward(request, response);

			}

			if(e instanceof HotelException){

				request.setAttribute("msg", e.getMessage());

				request.getRequestDispatcher(

						"/adminjsps/admin/dailyfix/meetting/addcategories.jsp")

						.forward(request, response);

			}

			request.setAttribute("msg", "系统繁忙，请稍后再试...");

			request.getRequestDispatcher(

					"/adminjsps/admin/dailyfix/meetting/addcategories.jsp")

					.forward(request, response);

		}

	}

public void doPost(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {

		try {

			一个大字（略）

			/**

			 * 6. 成功之后，将成功信息保存在request中

			 */

			request.setAttribute("msg", "添加成功");

			request.getRequestDispatcher(

					"/adminjsps/admin/dailyfix/meetting/addcategories.jsp")

					.forward(request, response);

		} catch (Exception e) {

			if (e instanceof FileSizeLimitExceededException) {

				request.setAttribute("msg", "上传文件的大小超出了50kb");

				request.getRequestDispatcher(

						"/adminjsps/admin/dailyfix/meetting/addcategories.jsp")

						.forward(request, response);

				return ;

			}

			if(e instanceof HotelException){

				request.setAttribute("msg", e.getMessage());

				request.getRequestDispatcher(

						"/adminjsps/admin/dailyfix/meetting/addcategories.jsp")

						.forward(request, response);

				return ;

			}

			request.setAttribute("msg", "系统繁忙，请稍后再试...");

			request.getRequestDispatcher(

					"/adminjsps/admin/dailyfix/meetting/addcategories.jsp")

					.forward(request, response);

		}

	}