新增文件导出工具方法-流模式

ChenJiaHe

2022-03-05 db1b408d60e2f4d0c48bc875a09ab4c8a2975367

新增文件导出工具方法-流模式

 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();
        }
    }

}