package mobi.dzs.android.util;import java.util.Locale;/*** 16进制值与String/Byte之间的转换* @author JerryLi* @email lijian@dzs.mobi* @data 2011-10-16* */
public class CHexConver
{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;}elsereturn 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 str 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;}/*** 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00str.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 CHexConver.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intiTmp = (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();}
}