sql.setEntity(dao.getEntity(cpsjk.class));
      dao.execute(sql);
      J4EConf j4eConf = J4EConf.from(cpsjk.class);
     j4eConf.setUse2007(true);
     List<J4EColumn> jcols = j4eConf.getColumns();
     for (J4EColumn j4eColumn : jcols)
     {
         j4eColumn.setIgnore(true);
         if(iswc=="0")
         {
           if("xcpren".equals(j4eColumn.getFieldName())) 
               {
                  j4eColumn.setIgnore(false);
                  j4eColumn.setColumnName("参与测评人姓名");
               }
         }
         else
           {
               if("bcpren".equals(j4eColumn.getFieldName()))
               {
                   j4eColumn.setIgnore(false);
                   j4eColumn.setColumnName("被测评人姓名");
               }
               if("bcprenqx".equals(j4eColumn.getFieldName()))
               {
                   j4eColumn.setIgnore(false);
                   j4eColumn.setColumnName("总分");
               }
               if(isbz=="0")
               {
                  if("xcpren".equals(j4eColumn.getFieldName())) 
                  {
                      j4eColumn.setIgnore(false); 
                      j4eColumn.setColumnName("参与测评人姓名");
                  }
                } 
             }
         
       }
      rs=sql.getList(cpsjk.class);
    
    SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmss");  
String str=sdf.format(new Date());
filename=filename+str+".xlsx";
OutputStream out = response.getOutputStream();
  response.setHeader("content-type", "application/shlnd.ms-excel;charset=utf-8");
  response.setHeader("content-disposition", "attachment; filename=" + new String(filename.getBytes(), "ISO-8859-1"));

  J4E.toExcel(out,rs , j4eConf);

在页面下载就报无法连接网站，郁闷了，请老大看看这个是什么问题。整个系统的导出EXCEL都报错，是不是改了什么依赖或服务器的环境？问题是我没有印象啊