Merge pull request 'cx' (#15) from cx into develop

ticketing-master/src/com/cn/servlet/ExportExcelServlet.java

@@ -81,7 +81,8 @@ public class ExportExcelServlet extends HttpServlet {
         writer.flush(out, true);
         // 关闭writer，释放内存
         writer.close();
-        // 关闭输出流
+      
+        // 关闭输出流.
         IoUtil.close(out);
     }
 }