今天心情不好，不想说话。

/**     * 文件转base64字符串     * @param file     * @return     */    public static String fileToBase64(File file) {        String base64 = null;        InputStream in = null;        try {            in = new FileInputStream(file);            byte[] bytes = new byte[in.available()];            int length = in.read(bytes);            base64 = Base64.encodeToString(bytes, 0, length, Base64.DEFAULT);        } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {            try {                if (in != null) {                    in.close();                }            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        return base64;    }    /**     * base64字符串转文件     * @param base64     * @return     */    public static File base64ToFile(String base64) {        File file = null;        String fileName = "/Petssions/record/testFile.amr";        FileOutputStream out = null;        try {            // 解码，然后将字节转换为文件            file = new File(Environment.getExternalStorageDirectory(), fileName);            if (!file.exists())                file.createNewFile();            byte[] bytes = Base64.decode(base64, Base64.DEFAULT);// 将字符串转换为byte数组            ByteArrayInputStream in = new ByteArrayInputStream(bytes);            byte[] buffer = new byte[1024];            out = new FileOutputStream(file);            int bytesum = 0;            int byteread = 0;            while ((byteread = in.read(buffer)) != -1) {                bytesum += byteread;                out.write(buffer, 0, byteread); // 文件写操作            }        } catch (IOException ioe) {            ioe.printStackTrace();        } finally {            try {                if (out!= null) {                    out.close();                }            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        return file;    }