java网络图片和二进制字符串间的转换

来源：互联网发布：java成绩代码编辑：程序博客网时间：2024/05/27 01:40
/**   * @Title           getImgeHexString   * @Description     网络图片转换成二进制字符串   * @param URLName   网络图片地址   * @param type      图片类型   * @return  String  转换结果   * @throws   */  public static String getImgeHexString(String URLName,String type) {       String res = null;       try {           int HttpResult = 0; // 服务器返回的状态           URL url = new URL(URLName); // 创建URL           URLConnection urlconn = url.openConnection(); // 试图连接并取得返回状态码           urlconn.connect();           HttpURLConnection httpconn = (HttpURLConnection) urlconn;           HttpResult = httpconn.getResponseCode();           System.out.println(HttpResult);           if (HttpResult != HttpURLConnection.HTTP_OK) // 不等于HTTP_OK则连接不成功               System.out.print("fail");           else {               BufferedInputStream bis = new BufferedInputStream(urlconn.getInputStream());                 BufferedImage bm = ImageIO.read(bis);               ByteArrayOutputStream bos = new ByteArrayOutputStream();               ImageIO.write(bm, type, bos);               bos.flush();               byte[] data = bos.toByteArray();                 res = byte2hex(data);               bos.close();           }       } catch (Exception e) {           e.printStackTrace();       }       return res;   }     /**   * @title           根据二进制字符串生成图片   * @param data      生成图片的二进制字符串   * @param fileName  图片名称(完整路径)   * @param type      图片类型   * @return   */  public static void saveImage(String data, String fileName,String type) {         BufferedImage image = new BufferedImage(300, 300,BufferedImage.TYPE_BYTE_BINARY);       ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();       try {           ImageIO.write(image, type, byteOutputStream);           // byte[] date = byteOutputStream.toByteArray();           byte[] bytes = hex2byte(data);           System.out.println("path:" + fileName);           RandomAccessFile file = new RandomAccessFile(fileName, "rw");           file.write(bytes);           file.close();       } catch (IOException e) {           e.printStackTrace();       }   }     /**   * 反格式化byte   *    * @param s   * @return   */  public static byte[] hex2byte(String s) {       byte[] src = s.toLowerCase().getBytes();       byte[] ret = new byte[src.length / 2];       for (int i = 0; i < src.length; i += 2) {           byte hi = src[i];           byte low = src[i + 1];           hi = (byte) ((hi >= 'a' && hi <= 'f') ? 0x0a + (hi - 'a')                   : hi - '0');           low = (byte) ((low >= 'a' && low <= 'f') ? 0x0a + (low - 'a')                   : low - '0');           ret[i / 2] = (byte) (hi << 4 | low);       }       return ret;   }     /**   * 格式化byte   *    * @param b   * @return   */  public static String byte2hex(byte[] b) {       char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',               'B', 'C', 'D', 'E', 'F' };       char[] out = new char[b.length * 2];       for (int i = 0; i < b.length; i++) {           byte c = b[i];           out[i * 2] = Digit[(c >>> 4) & 0X0F];           out[i * 2 + 1] = Digit[c & 0X0F];       }         return new String(out);   }
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