java簡單實現檔案下載

標籤：store   new   string   目錄   osi   []   input   value   eal   

//檔案下載 public void download(HttpServletRequest request,                      HttpServletResponse response, String storeName, String contentType)throws Exception{     request.setCharacterEncoding("UTF-8");     BufferedInputStream bis = null;     BufferedOutputStream bos = null;     //擷取項目根目錄     String ctxPath = request.getSession().getServletContext()             .getRealPath("/resource/download/");     //擷取下載檔案露肩     String downLoadPath = ctxPath+storeName;     //擷取檔案的長度     long fileLength = new File(downLoadPath).length();     //設定檔案輸出類型     response.setContentType("application/octet-stream");     response.setHeader("Content-disposition", "attachment; filename="             + new String(storeName.getBytes("utf-8"), "ISO8859-1"));     //設定輸出長度     response.setHeader("Content-Length", String.valueOf(fileLength));     //擷取輸入資料流     bis = new BufferedInputStream(new FileInputStream(downLoadPath));     //輸出資料流     bos = new BufferedOutputStream(response.getOutputStream());     byte[] buff = new byte[2048];     int bytesRead;     while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {         bos.write(buff, 0, bytesRead);     }     //關閉流     bis.close();     bos.close(); }

 

java簡單實現檔案下載