BASE64上傳圖片,byte[]上傳 轉File

/**
     * BASE64上傳圖片
     *
     * @param baseStr   base64字符串
     * @param imagePath 生成的圖片地址
     * @return
     */
    public void base64ChangeImage(String baseStr, String imagePath) throws Exception {
        BASE64Decoder decoder = new BASE64Decoder();
        OutputStream out = null;
        try {
            // 解密
            byte[] b = decoder.decodeBuffer(baseStr);
            // 處理數據
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {
                    b[i] += 256;
                }
            }
            out = new FileOutputStream(imagePath);
            out.write(b);
        } catch (Exception e) {
            throw new Exception("文件上傳失敗");
        } finally {
            if (out != null) {
                out.flush();
                out.close();
            }
        }
    }