Java上传文件错误处理-优快云博客

本文链接：https://blog.youkuaiyun.com/cxfjava/article/details/86218805

<%@ page language="java" import="java.util.*" isELIgnored="false"
   pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ include file="../common/common.jsp"%>
<html>
<head>
</head>
<body >
   <font color="#FF0000"><h4>${text}</h4></font>
   <table>
       <tr>
           <td><input type="hidden" id="messages" name="messages" value="${text}"/></td>
       </tr>
   </table>
       <script type="text/javascript">
           var m = document.getElementById("messages").value;
           /*parent.alertmess(m); */
           alert(m);
           window.close();
       </script>
</body>
</html>

后台代码：

try {
               fileName = file.getOriginalFilename();
               String fileExtends = fileName.split("\\.")[fileName.split("\\.").length - 1];
               if (!"xls".equals(fileExtends)) {
                   logger.error("必须上传 .xls 格式的Excel文件");
                   throw new BusinessException("必须上传 .xls 格式的Excel文件");
               }
               ins = file.getInputStream();
               String flag = trainingScheduleService.upload(ins, fileName);
               modelAndView.addObject("text", flag);
               modelAndView.setViewName("/schedule/scheduleError");
           } catch (BusinessException e) {
               modelAndView.addObject("text", e.getMessage());
               modelAndView.setViewName("/schedule/scheduleError");
               logger.error(e.getMessage());
           } catch (IOException e) {
               modelAndView.addObject("text", "处理文件失败");
               modelAndView.setViewName("/schedule/scheduleError");
               e.printStackTrace();
           } catch (Exception e) {
               modelAndView.addObject("text", "处理文件失败");
               modelAndView.setViewName("/schedule/scheduleError");
               e.printStackTrace();
           } finally {
               if (ins != null) {
                   try {
                       ins.close();
                   } catch (IOException e) {
                   logger.error(e.getMessage());
                   }
               }
           }

定义一个错误页面