16进制和字符串之间转换

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package com.nantian.iclient.atm.sdb;

public class Util {  public Util() {  }

  /**   * 将指定byte数组以16进制的形式打印到控制台   * @param hint String   * @param b byte[]   * @return void   */  public static void printHexString(String hint, byte[] b) {    System.out.print(hint);    for (int i = 0; i < b.length; i++) {      String hex = Integer.toHexString(b[i] & 0xFF);      if (hex.length() == 1) {        hex = '0' + hex;      }      System.out.print(hex.toUpperCase() + " ");    }    System.out.println("");  }

  /**   *   * @param b byte[]   * @return String   */  public static String Bytes2HexString(byte[] b) {    String ret = "";    for (int i = 0; i < b.length; i++) {      String hex = Integer.toHexString(b[i] & 0xFF);      if (hex.length() == 1) {        hex = '0' + hex;      }      ret += hex.toUpperCase();    }    return ret;  }

  /**   * 将两个ASCII字符合成一个字节;   * 如:"EF"--> 0xEF   * @param src0 byte   * @param src1 byte   * @return byte   */  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;  }

  /**   * 将指定字符串src,以每两个字符分割转换为16进制形式   * 如:"2B44EFD9" --> byte[]{0x2B, 0x44, 0xEF, 0xD9}   * @param src String   * @return byte[]   */  public static byte[] HexString2Bytes(String src){    byte[] ret = new byte[8];    byte[] tmp = src.getBytes();    for(int i=0; i<8; i++){      ret[i] = uniteBytes(tmp[i*2], tmp[i*2+1]);    }    return ret;  }

}

 

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