getController().renderFile("c:/Download/a.txt");*/

严重: /admin/commonPage/doDiyFunc

java.lang.IllegalStateException: getOutputStream() has already been called for this response

at org.apache.catalina.connector.Response.getWriter(Response.java:663)

at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:213)

at com.jfinal.render.ErrorRender.render(ErrorRender.java:59)

各位大佬这个异常怎么解决

网上说在   .jsp  页面 加上了如下两句

              out.clear();
              out = pageContext.pushBody();

可我不太清楚在  .java  怎么加