Question

写了一个简单的代码从文件系统下载文件，但仍然没有下载弹出，因此文件没有下载，甚至没有抛出任何错误。请帮助我。以下是我的代码写在控制器端。

@RequestMapping(value = "download", method=RequestMethod.POST)
    public @ResponseBody void download(HttpServletRequest request, HttpServletResponse response){
        String fileName="/home/test/Testing.xlsx";
        PrintWriter out=null;

        try{
            System.out.println(fileName.substring(fileName.lastIndexOf('/')+1)+"fileName");
            response.setContentType("application/vnd.ms-excel");
            response.setHeader("Cache-Control", "must-revalidate");
            response.setHeader( "Pragma", "public" );
            response.setHeader("Content-Disposition", "attachment; filename=" + fileName.substring(fileName.lastIndexOf('/')+1) );
            out = response.getWriter();
            int i;
            FileInputStream inputStream = new FileInputStream(fileName);
            while ((i = inputStream.read()) != -1) {
                out.write(i);
            }
            inputStream.close();
            out.close();

        }
        catch(Exception e){
            System.out.println(e);
        }


    }

Answer 1

这里的错误是POST方法，我们不应该使用post方法而应该在编写下载程序时始终使用GET方法。

 @RequestMapping(value = "download", method=RequestMethod.GET)
        public @ResponseBody void download(HttpServletRequest request, HttpServletResponse response){
            String fileName="/home/test/Testing.xlsx";
            PrintWriter out=null;

            try{
                System.out.println(fileName.substring(fileName.lastIndexOf('/')+1)+"fileName");
                response.setContentType("application/vnd.ms-excel");
                response.setHeader("Cache-Control", "must-revalidate");
                response.setHeader( "Pragma", "public" );
                response.setHeader("Content-Disposition", "attachment; filename=" + fileName.substring(fileName.lastIndexOf('/')+1) );
                out = response.getWriter();
                int i;
                FileInputStream inputStream = new FileInputStream(fileName);
                while ((i = inputStream.read()) != -1) {
                    out.write(i);
                }
                inputStream.close();
                out.close();

            }
            catch(Exception e){
                System.out.println(e);
            }


        }

文件下载弹出即将到来

1 个答案: