Spring mvc 解决getOutputStream() has already been called for this response

Spring mvc  导出EXecl 解决getOutputStream() has already been called for this response，

 

It can be exported normally, but the console is reporting an error. I found a lot of methods in Baidu, but it doesn't work. If you see it, you can try this method to see if it can be solved.   

 

Pay code:

 

error code:

SwpscService swpscService = (SwpscService) SpringContextUtil.getBean("SwpscService");

mav.addObject("pageobj",swpscService.serachList2(pb));

 

if(pb.getOthersql8().equals("P")){

ExcelExport excelExport=new ExcelExport();

       excelExport.Excelexport(request, response, pb.getResultList());

       

}

 

mav.setViewName("Order_FH_tongji");

return mav;

 

 Inside the method of excelExport.Excelexport;

   out = response.getOutputStream();  

           will report an error

 

Solution:

 

 

 

if(pb.getOthersql8().equals("P")){

ExcelExport excelExport=new ExcelExport();

       excelExport.Excelexport(request, response, pb.getResultList());

       return null;

}

 

mav.setViewName("Order_FH_tongji");

return mav;

        

Just return a null; 

 

Of course, this can only be adaptable, not a panacea