java网络图片Base64编码解码

Myth丶恋晨 2022-05-13 15:14 240阅读 0赞

# 编码 #

/**
         * 在线图片Base64编码
         * @param link 在线图片请求地址
         * @return
         * @throws IOException
         */
        public static String toBase64(String link) {
            byte[] data = null;
            InputStream inputStream = null;
            try {
                URL url = new URL(link);
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("GET");
                conn.setConnectTimeout(5000);
                inputStream = conn.getInputStream();
                //这里为分界上面代码是拿到网络图片，下面代码是编码
                data = new byte[inputStream.available()];
                if (inputStream != null){
                    inputStream.read(data);
                }
                if (inputStream != null){
                    inputStream.close();
                }
            }catch (Exception e) {
                        e.printStackTrace();
                    }
                    BASE64Encoder encoder = new BASE64Encoder();
                    return encoder.encode(data);
        }

# 解码 #

/**
    * 文件Base64解码Java示例代码
    *
    * @param str      需要解码的字符
    * @param filePath 生成文件的路径
    * @return
    */
    public static boolean decodeStrToFile(String str, String filePath) {
         if (str == null)
         return false;
         BASE64Decoder decoder = new BASE64Decoder();
         try {
             byte[] bytes = decoder.decodeBuffer(str);
             for (int i = 0; i < bytes.length; ++i) {
                  if (bytes[i] < 0) {
                      bytes[i] += 256;
                  }
             }
             OutputStream out = new FileOutputStream(filePath);
             out.write(bytes);
             out.flush();
             out.close();
             return true;
         } catch (Exception e) {
             return false;
         }
    }