java.lang.IllegalStateException: Cannot forward after response has been committed的一个情况解决方法

java.lang.IllegalStateException: Cannot forward after response has been committed
xxx.xxx.doPost(updateArticle.java:46)
javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.32 logs.

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自动生成的 super.doPost(req, resp);没有去掉了