JAVA二进制字节数组字符十六进制BCD编码转换

   JAVA二进制字节数组字符十六进制BCD编码转换

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import java.io.*;

import java.security.MessageDigest;

importjava.security.NoSuchAlgorithmException;

 

public class DataConverter {

       /*把16进制字符串转换成字节数组

    *@param hex

    *@return

   */

public static byte[] hexStringToByte(Stringhex) {

   int len = (hex.length() / 2);

   byte[] result = new byte[len];

   char[] achar = hex.toCharArray();

   for (int i = 0; i < len; i++) {

    int pos = i * 2;

    result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos +1]));

    }

   return result;

}

 

private static byte toByte(char c) {

   byte b = (byte) "0123456789ABCDEF".indexOf(c);

   return b;

}

 

/** *//**

    *把字节数组转换成16进制字符串

    *@param bArray

    *@return

   */

public static final StringbytesToHexString(byte[] bArray) {

   StringBuffer sb = new StringBuffer(bArray.length);

   String sTemp;

   for (int i = 0; i < bArray.length; i++) {

    sTemp = Integer.toHexString(0xFF & bArray[i]);

    if (sTemp.length() < 2)

     sb.append(0);

    sb.append(sTemp.toUpperCase());

    }

   return sb.toString();

}

 

/** *//**

    *把字节数组转换为对象

    *@param bytes

    *@return

    *@throws IOException

    *@throws ClassNotFoundException

   */

public static final ObjectbytesToObject(byte[] bytes) throws IOException, ClassNotFoundException {

   ByteArrayInputStream in = new ByteArrayInputStream(bytes);

   ObjectInputStream oi = new ObjectInputStream(in);

   Object o = oi.readObject();

   oi.close();

   return o;

}

 

/** *//**

    *把可序列化对象转换成字节数组

    *@param s

    *@return

    *@throws IOException

   */

public static final byte[]objectToBytes(Serializable s) throws IOException {

   ByteArrayOutputStream out = new ByteArrayOutputStream();

   ObjectOutputStream ot = new ObjectOutputStream(out);

   ot.writeObject(s);

   ot.flush();

   ot.close();

   return out.toByteArray();

}

 

public static final StringobjectToHexString(Serializable s) throws IOException{

   return bytesToHexString(objectToBytes(s));

}

 

public static final ObjecthexStringToObject(String hex) throws IOException, ClassNotFoundException{

   return bytesToObject(hexStringToByte(hex));

}

 

/** *//**

    *@函数功能: BCD码转为10进制串(阿拉伯数据)

    *@输入参数: BCD码

    *@输出结果: 10进制串

   */

public static String bcd2Str(byte[] bytes){

   StringBuffer temp=new StringBuffer(bytes.length*2);

 

   for(int i=0;i<bytes.length;i++){

    temp.append((byte)((bytes[i]& 0xf0)>>>4));

     temp.append((byte)(bytes[i]& 0x0f));

    }

   returntemp.toString().substring(0,1).equalsIgnoreCase("0")?temp.toString().substring(1):temp.toString();

}

 

/** *//**

    *@函数功能: 10进制串转为BCD码

    *@输入参数: 10进制串

    *@输出结果: BCD码

   */

public static byte[] str2Bcd(String asc) {

   int len = asc.length();

   int mod = len % 2;

 

   if (mod != 0) {

    asc = "0" + asc;

    len = asc.length();

    }

 

   byte abt[] = new byte[len];

   if (len >= 2) {

    len = len / 2;

    }

 

   byte bbt[] = new byte[len];

   abt = asc.getBytes();

   int j, k;

 

   for (int p = 0; p < asc.length()/2; p++) {

    if ( (abt[2 * p] >= '0') && (abt[2 * p] <= '9')) {

     j = abt[2 * p] - '0';

    } else if ( (abt[2 * p] >= 'a') && (abt[2 * p] <= 'z')) {

     j = abt[2 * p] - 'a' + 0x0a;

    } else {

     j = abt[2 * p] - 'A' + 0x0a;

    }

 

    if ( (abt[2 * p + 1] >= '0') && (abt[2 * p + 1] <= '9')) {

     k = abt[2 * p + 1] - '0';

    } else if ( (abt[2 * p + 1] >= 'a') && (abt[2 * p + 1] <='z')) {

     k = abt[2 * p + 1] - 'a' + 0x0a;

    }else {

     k = abt[2 * p + 1] - 'A' + 0x0a;

    }

 

    int a = (j << 4) + k;

    byte b = (byte) a;

    bbt[p] = b;

    }

   return bbt;

}

/** *//**

    *@函数功能: BCD码转ASC码

    *@输入参数: BCD串

    *@输出结果: ASC码

   */

/*public static String BCD2ASC(byte[]bytes) {

  StringBuffer temp = new StringBuffer(bytes.length * 2);

 

   for (int i = 0; i < bytes.length; i++) {

    int h = ((bytes[i] & 0xf0) >>> 4);

    int l = (bytes[i] & 0x0f); 

    temp.append(BToA[h]).append( BToA[l]);

    }

   return temp.toString() ;

   

      

}

*/

 

/** *//**

    *MD5加密字符串，返回加密后的16进制字符串

    *@param origin

    *@return

   */

public static String MD5EncodeToHex(Stringorigin) {

      return bytesToHexString(MD5Encode(origin));

    }

 

/** *//**

    *MD5加密字符串，返回加密后的字节数组

    *@param origin

    *@return

   */

public static byte[] MD5Encode(Stringorigin){

   return MD5Encode(origin.getBytes());

}

 

/** *//**

    *MD5加密字节数组，返回加密后的字节数组

    *@param bytes

    *@return

   */

public static byte[] MD5Encode(byte[]bytes){

   MessageDigest md=null;

   try {

    md = MessageDigest.getInstance("MD5");

    return md.digest(bytes);

    }catch (NoSuchAlgorithmException e) {

    e.printStackTrace();

    return new byte[0];

    }

 

}

 

 

}