16进制转字符串

package cn.luhui.yuerle.utils;

/**
 * @ClassName: HexDecode
 * @Description: 16进制转码
 * @author Chenliang
 * @date 2014-12-17 下午3:09:31
 *
 */
public class HexDecode {

 /**
  * 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) {
  src = src.replace(" ", "");
  int len = src.length() / 2;
  byte[] ret = new byte[len];
  byte[] tmp = src.getBytes();
  for (int i = 0; i < len; i++) {
   ret[i] = uniteBytes(tmp[i * 2], tmp[i * 2 + 1]);
  }
  return ret;
 }

 /**
  * 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;
 }
 

   
   
    /**
     * java字节码转字符串
     * @param b
     * @return
     */
    public static String byte2hex(byte[] b) { //一个字节的数，

        // 转成16进制字符串

        String hs = "";
        String tmp = "";
        for (int n = 0; n < b.length; n++) {
            //整数转成十六进制表示

            tmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
            if (tmp.length() == 1) {
                hs = hs + "0" + tmp;
            } else {
                hs = hs + tmp;
            }
        }
        tmp = null;
        return hs.toUpperCase(); //转成大写

    }

    /**
     * 字符串转java字节码
     * @param b
     * @return
     */
    public static byte[] hex2byte(byte[] b) {
        if ((b.length % 2) != 0) {
            throw new IllegalArgumentException("长度不是偶数");
        }
        byte[] b2 = new byte[b.length / 2];
        for (int n = 0; n < b.length; n += 2) {
            String item = new String(b, n, 2);
            // 两位一组，表示一个字节,把这样表示的16进制字符串，还原成一个进制字节

            b2[n / 2] = (byte) Integer.parseInt(item, 16);
        }
        b = null;
        return b2;
    }
 
 

 // 十进制转化为十六进制
 public static String to16Value(int a)
 {
  return  Integer.toHexString(a);
 }
 // 十六进制转化为十进制
 public static int to10Value(String aa)
 {
  return Integer.parseInt(aa,16);
 }
 
  /**
     * 字符串转换成十六进制值
     * @param bin String 我们看到的要转换成十六进制的字符串
     * @return
     */
    public static String bin2hex(String bin) {
        char[] digital = "0123456789ABCDEF".toCharArray();
        StringBuffer sb = new StringBuffer("");
        byte[] bs = bin.getBytes();
        int bit;
        for (int i = 0; i < bs.length; i++) {
            bit = (bs[i] & 0x0f0) >> 4;
            sb.append(digital[bit]);
            bit = bs[i] & 0x0f;
            sb.append(digital[bit]);
        }
        return sb.toString();
    }
    /**
     * 十六进制转换字符串
     * @param hex String 十六进制
     * @return String 转换后的字符串
     */
    public static String hex2bin(String hex) {
        String digital = "0123456789ABCDEF";
        char[] hex2char = hex.toCharArray();
        byte[] bytes = new byte[hex.length() / 2];
        int temp;
        for (int i = 0; i < bytes.length; i++) {
            temp = digital.indexOf(hex2char[2 * i]) * 16;
            temp += digital.indexOf(hex2char[2 * i + 1]);
            bytes[i] = (byte) (temp & 0xff);
        }
        return new String(bytes);
    }

}