废话不多说，直接上代码。转换16进制字节数组，做数据处理时用得着，收藏吧！
/** * Created by xiaoming on 2017-10-13 15:02. * * @mail sgyingyin@sina.com * @desc 16进制数据处理工具类 */public class HexDump { private final static char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};//十六进制的组成元素 /** * 字节数组以String形式输出 以空格分隔,如：FE 00 12 0F 0E * * @param array 字节数组 * @return */ public static String dumpHexString(byte[] array) { return dumpHexString(array, 0, array.length); } /** * 字节数组以String形式输出 字节间以空格分隔 * * @param array 字节数组 * @param offset 起始位置 * @param length 长度 * @return */ public static String dumpHexString(byte[] array, int offset, int length) { StringBuilder result = new StringBuilder(); byte[] line = new byte[16]; int lineIndex = 0; result.append("n0x"); result.append(toHexString(offset)); for (int i = offset; i < offset + length; i++) { if (lineIndex == 16) { result.append(" "); for (int j = 0; j < 16; j++) { if (line[j] > ' ' && line[j] < '~') { result.append(new String(line, j, 1)); } else { result.append("."); } } result.append("n0x"); result.append(toHexString(i)); lineIndex = 0; } byte b = array[i]; result.append(" "); result.append(HEX_DIGITS[(b >>> 4) & 0x0F]); result.append(HEX_DIGITS[b & 0x0F]); line[lineIndex++] = b; } if (lineIndex != 16) { int count = (16 - lineIndex) * 3; count++; for (int i = 0; i < count; i++) { result.append(" "); } for (int i = 0; i < lineIndex; i++) { if (line[i] > ' ' && line[i] < '~') { result.append(new String(line, i, 1)); } else { result.append("."); } } } return result.toString(); } /** * 字节转16进制String * * @param b 字节 * @return */ public static String toHexString(byte b) { return toHexString(toByteArray(b)); } /** * 字节数组转16进制String，无分隔，如：FE00120F0E * * @param array 字节数组 * @return */ public static String toHexString(byte[] array) { return toHexString(array, 0, array.length); } /** * 字节数组转16进制String，无分隔，如：FE00120F0E * * @param array 字节数组 * @param offset 起始 * @param length 长度 * @return */ public static String toHexString(byte[] array, int offset, int length) { char[] buf = new char[length * 2]; int bufIndex = 0; for (int i = offset; i < offset + length; i++) { byte b = array[i]; buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F]; buf[bufIndex++] = HEX_DIGITS[b & 0x0F]; } return new String(buf); } /** * int转16进制String * * @param i * @return */ public static String toHexString(int i) { return toHexString(toByteArray(i)); } /** * 字节转数组 * * @param b * @return */ public static byte[] toByteArray(byte b) { byte[] array = new byte[1]; array[0] = b; return array; } /** * int转字节数组 * * @param i * @return */ public static byte[] toByteArray(int i) { byte[] array = new byte[4]; array[3] = (byte) (i & 0xFF); array[2] = (byte) ((i >> 8) & 0xFF); array[1] = (byte) ((i >> 16) & 0xFF); array[0] = (byte) ((i >> 24) & 0xFF); return array; } /** * 十六进制转int * * @param c * @return */ private static int toByte(char c) { if (c >= '0' && c <= '9') return (c - '0'); if (c >= 'A' && c <= 'F') return (c - 'A' + 10); if (c >= 'a' && c <= 'f') return (c - 'a' + 10); throw new RuntimeException("Invalid hex char '" + c + "'"); } /** * 十六进制字符串转字节数组 * * @param hexString 如：FE00120F0E * @return */ public static byte[] hexStringToByteArray(String hexString) { int length = hexString.length(); byte[] buffer = new byte[length / 2]; for (int i = 0; i < length; i += 2) { buffer[i / 2] = (byte) ((toByte(hexString.charAt(i)) << 4) | toByte(hexString.charAt(i + 1))); } return buffer; }}