文件流处理

文件下载到本地 保存为流 然后通过流进行上传

/**
     * 文件保存在本地返回一个数据流
     * @param path
     * @return
     */
    public DataInputStream downFile(String path) {
        /*String pathJmx= "C:\home\tools\";*/
        try {
            //从服务器下载path
            File files = new File(path);
            // 取得文件名。
            String fileName = files.getName();
            //保存位置
            DataInputStream in = new DataInputStream(new FileInputStream(path));
            DataOutputStream out = new DataOutputStream(new FileOutputStream(pathJmx + fileName));
            BufferedReader d = new BufferedReader(new InputStreamReader(in));
            String count;
            while ((count = d.readLine()) != null) {
                String u = count.toUpperCase();
                out.writeBytes(u+ ",");
            }
            FileInputStream fis = new FileInputStream(pathJmx + fileName);

            BufferedInputStream bis = new BufferedInputStream(fis);

            DataInputStream dis = new DataInputStream(bis);
            /*d.close();
            out.close();*/
            return dis;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }




/**
     * 把流转换为文件
     * @param path
     * @param is
     * @return
     * @throws IOException
     */
    public  String inputStreamToFile(String path,DataInputStream is) throws IOException {
        File file = new File(path);
        String name = file.getName();
        String paths = "F:\Program Files\Tencent\" + name;
        DataOutputStream outputStream = null;
        outputStream = new DataOutputStream(new FileOutputStream(paths));
        BufferedReader d  = new BufferedReader(new InputStreamReader(is));
        String count;
        while ((count = d.readLine()) != null) {
            String u = count.toUpperCase();
            outputStream.writeBytes(u+ ",");
        }
        is.close();
        outputStream.close();
        return paths;
    }



public static void main(String[] args) throws IOException {
        String path = "C:\assert.c";
        //新文件
        String pathJmx = "F:\Program Files\shx.c";
        DataInputStream dataInputStream = downFile(path);
        //生成新的文件
        String pas = inputStreamToFile(pathJmx, dataInputStream);
        System.out.println("路径:" + pas);
        }

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