基於springmvc，poi處處excel文件

POI導出excel

springmvc上傳以及下載

//上傳文件會自動綁定到MultipartFile中

@RequestMapping(value="/upload",method=RequestMethod.POST)

public String upload(HttpServletRequest request,

@RequestParam("description") String description,

@RequestParam("file") MultipartFile file) throws Exception {

System.out.println(description); //若是文件不爲空，寫入上傳路徑

if(!file.isEmpty()) {

//上傳文件路徑

String path = request.getServletContext().getRealPath("/images/");

//上傳文件名 String filename = file.getOriginalFilename();

File filepath = new File(path,filename);

//判斷路徑是否存在，若是不存在就建立一個

if (!filepath.getParentFile().exists())

{ filepath.getParentFile().mkdirs(); }

//將上傳文件保存到一個目標文件當中

file.transferTo(new File(path + File.separator + filename)); return "success"; } else { return "error"; }

}

//下載文件SpringMVC提供了一個ResponseEntity類型，使用它能夠很方便地定義返回的HttpHeaders和HttpStatus

@RequestMapping(value="/download")

public ResponseEntity<byte[]> download(HttpServletRequest request,

@RequestParam("filename") String filename,

Model model)throws Exception

{ //下載文件路徑

String path = request.getServletContext().getRealPath("/images/");

File file = new File(path + File.separator + filename); HttpHeaders headers = new HttpHeaders();

//下載顯示的文件名，解決中文名稱亂碼問題

String downloadFielName = new String(filename.getBytes("UTF-8"),"iso-8859-1");

//通知瀏覽器以attachment（下載方式）打開圖片

headers.setContentDispositionFormData("attachment", downloadFielName);

//application/octet-stream ： 二進制流數據（最多見的文件下載）

headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);

return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),

headers, HttpStatus.CREATED); }