JAVA 16进制byte数组与String字符串互转

最新推荐文章于 2024-08-12 14:15:44 发布

秋风落叶黄

最新推荐文章于 2024-08-12 14:15:44 发布

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分类专栏： java

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本文介绍如何在Java中将16进制表示的Byte数组转换为String字符串，以及如何将String字符串转换回Byte数组。这对于数据编码和解码操作非常有用。

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//将16进制字符串转换成Long

byte[] fxx={01,02};
Long fx=Long.parseLong(bytesToString2(fxx).replace(" ",""), 16);

//16进制byte数组转string
private String bytesToString(byte[] arg, int length) {
   String result = new String();
   if (arg != null) {
      for (int i = 0; i < length; i++) {
         result = result
               + (Integer.toHexString(
                     arg[i] < 0 ? arg[i] + 256 : arg[i]).length() == 1 ? "0"
                     + Integer.toHexString(arg[i] < 0 ? arg[i] + 256
                           : arg[i])
                     : Integer.toHexString(arg[i] < 0 ? arg[i] + 256
                           : arg[i])) + " ";
      }
      return result;
   }
   return "";
}

public String bytesToString2(byte[] bytes) {
   final char[] hexArray = "0123456789ABCDEF".toCharArray();
   char[] hexChars = new char[bytes.length * 2];
   StringBuilder sb = new StringBuilder();
   for (int i = 0; i < bytes.length; i++) {
      int v = bytes[i] & 0xFF;
      hexChars[i * 2] = hexArray[v >>> 4];
      hexChars[i * 2 + 1] = hexArray[v & 0x0F];

      sb.append(hexChars[i * 2]);
      sb.append(hexChars[i * 2 + 1]);
      sb.append(' ');
   }
   return sb.toString();
}

//string转byte数组

private byte[] toByteArray(String arg) {
   if (arg != null) {
      char[] NewArray = new char[1000];
      char[] array = arg.toCharArray();
      int length = 0;
      for (int i = 0; i < array.length; i++) {
         if (array[i] != ' ') {
            NewArray[length] = array[i];
            length++;
         }
      }

      int EvenLength = (length % 2 == 0) ? length : length + 1;
      if (EvenLength != 0) {
         int[] data = new int[EvenLength];
         data[EvenLength - 1] = 0;
         for (int i = 0; i < length; i++) {
            if (NewArray[i] >= '0' && NewArray[i] <= '9') {
               data[i] = NewArray[i] - '0';
            } else if (NewArray[i] >= 'a' && NewArray[i] <= 'f') {
               data[i] = NewArray[i] - 'a' + 10;
            } else if (NewArray[i] >= 'A' && NewArray[i] <= 'F') {
               data[i] = NewArray[i] - 'A' + 10;
            }
         }
         byte[] byteArray = new byte[EvenLength / 2];
         for (int i = 0; i < EvenLength / 2; i++) {
            byteArray[i] = (byte) (data[i * 2] * 16 + data[i * 2 + 1]);
         }
         return byteArray;
      }
   }
   return new byte[] {};
}


private byte[] toByteArray2(String arg) {
   if (arg != null) {
      char[] NewArray = new char[1000];
      char[] array = arg.toCharArray();
      int length = 0;
      for (int i = 0; i < array.length; i++) {
         if (array[i] != ' ') {
            NewArray[length] = array[i];
            length++;
         }
      }
      NewArray[length] = 0x0D;
      NewArray[length + 1] = 0x0A;
      length += 2;

      byte[] byteArray = new byte[length];
      for (int i = 0; i < length; i++) {
         byteArray[i] = (byte)NewArray[i];
      }
      return byteArray;

   }
   return new byte[] {};
}