Java教程：二进制数组与十六进制字符串之间的相互转换

二进制数组转十六进制字符串

private static String bytesToHexString(byte[] bArray) {
        StringBuffer sb = new StringBuffer(bArray.length);
        String sTemp;
        for (int i = 0; i < bArray.length; i++) {
            sTemp = Integer.toHexString(0xFF & bArray[i]);
            if (sTemp.length() < 2) {
                sb.append(0);
            }
            sb.append(sTemp.toUpperCase());
        }
        return sb.toString();
    }
1
2
3
4
5
6
7
8
9
10
11
12

十六进制字符串转二进制数组

private static byte[] hexStringToByte(String hex) {
        int m = 0, n = 0;
        // 每两个字符描述一个字节
        int byteLen = hex.length() / 2;
        byte[] ret = new byte[byteLen];
        for (int i = 0; i < byteLen; i++) {
            m = i * 2 + 1;
            n = m + 1;
            int intVal = Integer.decode("0x" + hex.substring(i * 2, m) + hex.substring(m, n));
            ret[i] = (byte) intVal;
        }
        return ret;
    }
1
2
3
4
5
6
7
8
9
10
11
12
13