通过POST将XLS文件下载到Spring MVC

请问我有问题。 我需要在Java上下载一个动态创建的xls。

这是我的客户端代码：

exportToExcel: function(filters, exportData) { $.ajax ({ type: "POST", url: 'status/exportToExcel', async: true, data: {columns: exportData, filters: JSON.stringify(filters)}, success: function (data) { var blob = new Blob([data], { "type" : "application/vnd.ms-excel" }); var objectUrl = URL.createObjectURL(blob); window.open(URL.createObjectURL(objectUrl)); }, error: function (a,b,c){ alert(c); } }); } 

这是我的服务端代码：

 @ResponseBody @RequestMapping(value = "exportToExcel") public void exportToExcel( @RequestParam(value = "columns", required = true) List columns, @RequestParam(value = "filters", required = false) String filters, HttpServletRequest request){ request.getHeaders().setContentType(getMediaType(excelFile)); request.getHeaders().set("Content-Disposition", String.format("attachment; filename=%s.%s", excelFile.getName(), excelFile.getFormat())); try { FileCopyUtils.copy(new DataInputStream(new FileInputStream(excelFile.getFile())), httpOutputMessage.getBody()); } catch (IOException e) { logger.error("Exception in file download", e); }catch(Exception e){ logger.error("Exception in file download", e); } } 

我不知道如何显示下载对话框，如果是GET一个简单的window.location解决问题，但我的参数可能太大，GET无法解决。

Answer 1

 @RequestMapping(value = "/exportToExcel", method = RequestMethod.POST) @ResponseBody public void exportToExcel(-, -, -, -, HttpServletRequest request,HttpServletResponse response ) { try{ InputStream inputStream = service.calltoGetInputStream(); //logic to get inputstream String headerKey = "Content-Disposition"; String headerValue = String.format("attachment; filename=\"%s\"", "excelfilename.xlsx"); response.setHeader(headerKey, headerValue); try { FileCopyUtils.copy(inputStream, response.getOutputStream()); } catch (IOException e) { e.printStackTrace(); } }catch(Exception e){ System.out.println("Exception in file download :"+e); } } 

Answer 2

我在POST时解决了我的问题，我将文件保存在一个文件夹中，之后我将路径返回到我的javascript客户端。 使用filena很简单做一个GET请求。]

 exportToExcel: function(filters, exportData) { $.ajax ({ type: "POST", url: 'status/exportToExcel', async: true, data: {columns: exportData, filters: JSON.stringify(filters)}, success: function (data) { window.location = 'status/downloadExcel?file='+data; }, }); }