新增文件导出工具方法-流模式

ChenJiaHe

2022-03-05 db1b408d60e2f4d0c48bc875a09ab4c8a2975367

 src/main/java/com/hx/util/DownFileUtil.java

@@ -146,4 +146,45 @@
      }
   }

   /**
    * 下载文件工具（提示选择路径）
    *
    * @param inputStream
    *            导出的文件流
    * @param fileName
    *            导出的文件名称
    */
   public static void DownFileTips(HttpServletRequest request, HttpServletResponse response, InputStream  inputStream , String fileName) {
      final String userAgent = request.getHeader("USER-AGENT");
      try {
         if(StringUtils.isEmpty(fileName)){
            throw new RuntimeException("请输入文件名称");
         }
         String filename =  "";
         if(userAgent.equals("MSIE")){//IE浏览器
            filename = URLEncoder.encode(fileName,"UTF8");
         }else if(userAgent.equals("Mozilla")){//google,火狐浏览器
            filename = new String(fileName.getBytes(), "ISO8859-1");
         }else{
            filename = URLEncoder.encode(fileName,"UTF8");//其他浏览器
         }
         InputStream fis = new BufferedInputStream(inputStream);
         byte[] buffer = new byte[fis.available()];
         fis.read(buffer);
         fis.close();

         response.addHeader("Content-Disposition", "attachment;filename="+ filename);
         OutputStream toClient= new BufferedOutputStream(response.getOutputStream());
         response.setContentType("application/vnd.ms-excel;charset=utf-8");

         toClient.write(buffer);
         toClient.flush();
         toClient.close();
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      } catch (IOException e) {
         e.printStackTrace();
      }
   }

}