springmvc下載檔案，springmvc下載

springmvc下載檔案，springmvc下載

可以跨域下載

        /**     * 音頻下載     */    @RequestMapping("/audio/download")    public void downloadFile(HttpServletRequest request, HttpServletResponse response) throws IOException {          //String id = request.getParameter("id");         String filePath = ServletRequestUtils.getStringParameter(request, "filePath", ""); //        String fileName = ServletRequestUtils.getStringParameter(request, "fileName", ""); //        String destUrl = filePath;        //System.out.println("--------------"+filePath);                 String fileFormat=filePath.substring(filePath.lastIndexOf("."));        String name=fileName.trim()+fileFormat;        //File f = new File(filePath);        //response.setHeader("Content-Disposition", "attachment; filename="+java.net.URLEncoder.encode(f.getName(),"UTF-8"));          //System.out.println("--------------"+f.getName());        // 建立連結          URL url = new URL(destUrl);          HttpURLConnection httpUrl = (HttpURLConnection) url.openConnection();          // 串連指定的資源          httpUrl.connect();          // 擷取網路輸入資料流          BufferedInputStream bis = new BufferedInputStream(httpUrl.getInputStream());            response.setContentType("application/x-msdownload");          response.setHeader("Content-Disposition", "attachment; filename="+java.net.URLEncoder.encode(name,"UTF-8"));          OutputStream out = response.getOutputStream();          byte[] buf = new byte[1024];          if (destUrl != null) {              BufferedInputStream br = bis;              int len = 0;              while ((len = br.read(buf)) > 0){                  out.write(buf, 0, len);              }                             br.close();          }          out.flush();          out.close();        } 

頁面主要代碼：

<div class="txt-2" style="padding-left:6px;float:none;">    <a href="/wxj/audio/download?filePath=${(contentJson.audiolink)!''}&fileName=${(course.title)!''}" class="btn btn-info">下　載</a></div>