package com.hdw.common.util; import org.apache.commons.lang3.StringUtils; import java.util.Locale; /** * 16进制值与String/Byte之间的转换 */ public class CHexConvert { private final static char[] mChars = "0123456789ABCDEF".toCharArray(); private final static String mHexStr = "0123456789ABCDEF"; /** * 检查16进制字符串是否有效 * * @param sHex String 16进制字符串 * @return boolean */ public static boolean checkHexStr(String sHex) { String sTmp = sHex.toString().trim().replace(" ", "").toUpperCase(Locale.US); int iLen = sTmp.length(); if (iLen > 1 && iLen % 2 == 0) { for (int i = 0; i < iLen; i++) if (!mHexStr.contains(sTmp.substring(i, i + 1))) return false; return true; } else return false; } /** * 字符串转换成十六进制字符串 * * @param str String 待转换的ASCII字符串 * @return String 每个Byte之间空格分隔,如: [61 6C 6B] */ public static String str2HexStr(String str) { StringBuilder sb = new StringBuilder(); byte[] bs = str.getBytes(); for (int i = 0; i < bs.length; i++) { sb.append(mChars[(bs[i] & 0xFF) >> 4]); sb.append(mChars[bs[i] & 0x0F]); sb.append(' '); } return sb.toString().trim(); } /** * 十六进制字符串转换成 ASCII字符串 * * @param hexStr String Byte字符串 * @return String 对应的字符串 */ public static String hexStr2Str(String hexStr) { hexStr = hexStr.toString().trim().replace(" ", "").toUpperCase(Locale.US); char[] hexs = hexStr.toCharArray(); byte[] bytes = new byte[hexStr.length() / 2]; int iTmp = 0x00; ; for (int i = 0; i < bytes.length; i++) { iTmp = mHexStr.indexOf(hexs[2 * i]) << 4; iTmp |= mHexStr.indexOf(hexs[2 * i + 1]); bytes[i] = (byte) (iTmp & 0xFF); } return new String(bytes); } /** * bytes转换成十六进制字符串 * * @param b byte[] byte数组 * @param iLen int 取前N位处理 N=iLen * @return String 每个Byte值之间空格分隔 */ public static String byte2HexStr(byte[] b, int iLen) { StringBuilder sb = new StringBuilder(); for (int n = 0; n < iLen; n++) { sb.append(mChars[(b[n] & 0xFF) >> 4]); sb.append(mChars[b[n] & 0x0F]); sb.append(' '); } return sb.toString().trim().toUpperCase(Locale.US); } /** * bytes转换成十六进制字符串 * * @param b byte[] byte数组 * @return String 每个Byte值之间空格分隔 */ public static String byte2HexStr(byte[] b) { int iLen = b.length; StringBuilder sb = new StringBuilder(); for (int n = 0; n < iLen; n++) { sb.append(mChars[(b[n] & 0xFF) >> 4]); sb.append(mChars[b[n] & 0x0F]); sb.append(' '); } return sb.toString().trim().toUpperCase(Locale.US); } /** * bytes字符串转换为Byte值 * * @param src String Byte字符串,每个Byte之间没有分隔符(字符范围:0-9 A-F) * @return byte[] */ public static byte[] hexStr2Bytes(String src) { /*对输入值进行规范化整理*/ src = src.trim().replace(" ", "").toUpperCase(Locale.US); //处理值初始化 int m = 0, n = 0; int iLen = src.length() / 2; //计算长度 byte[] ret = new byte[iLen]; //分配存储空间 for (int i = 0; i < iLen; i++) { m = i * 2 + 1; n = m + 1; ret[i] = (byte) (Integer.decode("0x" + src.substring(i * 2, m) + src.substring(m, n)) & 0xFF); } return ret; } /* * HexString2Bytes */ public static byte[] HexString2Bytes(String src) { if (null == src || 0 == src.length()) { return null; } byte[] ret = new byte[src.length() / 2]; byte[] tmp = src.getBytes(); for (int i = 0; i < (tmp.length / 2); i++) { ret[i] = uniteBytes(tmp[i * 2], tmp[i * 2 + 1]); } return ret; } /* * uniteBytes */ public static byte uniteBytes(byte src0, byte src1) { byte _b0 = Byte.decode("0x" + new String(new byte[]{src0})) .byteValue(); _b0 = (byte) (_b0 << 4); byte _b1 = Byte.decode("0x" + new String(new byte[]{src1})) .byteValue(); byte ret = (byte) (_b0 ^ _b1); return ret; } /** * String的字符串转换成unicode的String * * @param strText String 全角字符串 * @return String 每个unicode之间无分隔符 * @throws Exception */ public static String strToUnicode(String strText) throws Exception { char c; StringBuilder str = new StringBuilder(); int intAsc; String strHex; for (int i = 0; i < strText.length(); i++) { c = strText.charAt(i); intAsc = (int) c; strHex = Integer.toHexString(intAsc); if (intAsc > 128) str.append("\\u"); else // 低位在前面补00 str.append("\\u00"); str.append(strHex); } return str.toString(); } /** * unicode的String转换成String的字符串 * * @param hex String 16进制值字符串 (一个unicode为2byte) * @return String 全角字符串 * @see CHexConvert.unicodeToString("\\u0068\\u0065\\u006c\\u006c\\u006f") */ public static String unicodeToString(String hex) { int t = hex.length() / 6; int iTmp = 0; StringBuilder str = new StringBuilder(); for (int i = 0; i < t; i++) { String s = hex.substring(i * 6, (i + 1) * 6); // 将16进制的string转为int iTmp = (Integer.valueOf(s.substring(2, 4), 16) << 8) | Integer.valueOf(s.substring(4), 16); // 将int转换为字符 str.append(new String(Character.toChars(iTmp))); } return str.toString(); } public static int getValue(String str) { if (StringUtils.isNotEmpty(str)) { String[] strs = str.split(" "); String value = strs[3] + strs[4]; return Integer.parseInt(value, 16); } return 0; } /** * 异或效验生成 * * @param para * @return */ public static String checkCode(String para) { para = para.replace(" ", ""); int length = para.length() / 2; String[] dateArr = new String[length + 1]; try { for (int i = 0; i < length; i++) { dateArr[i] = para.substring(i * 2, i * 2 + 2); } } catch (Exception e) { throw new RuntimeException(e); } String code = ""; for (int i = 0; i < dateArr.length - 1; i++) { if (i == 0) { code = xor(dateArr[i], dateArr[i + 1]); } else { code = xor(code, dateArr[i]); } } return code.toUpperCase(); } /** * 异或算法 * * @param strHex_X * @param strHex_Y * @return */ private static String xor(String strHex_X, String strHex_Y) { //将x、y转成二进制形式 String anotherBinary = Integer.toBinaryString(Integer.valueOf(strHex_X, 16)); String thisBinary = Integer.toBinaryString(Integer.valueOf(strHex_Y, 16)); String result = ""; //判断是否为8位二进制,否则左补零 if (anotherBinary.length() != 8) { for (int i = anotherBinary.length(); i < 8; i++) { anotherBinary = "0" + anotherBinary; } } if (thisBinary.length() != 8) { for (int i = thisBinary.length(); i < 8; i++) { thisBinary = "0" + thisBinary; } } //异或运算 for (int i = 0; i < anotherBinary.length(); i++) { //如果相同位置数相同,则补0,否则补1 if (thisBinary.charAt(i) == anotherBinary.charAt(i)) result += "0"; else { result += "1"; } } return Integer.toHexString(Integer.parseInt(result, 2)); } }