JAVA二进制字节数组字符十六进制BCD编码转换;import java.io.*;import java.security.MessageDigest;import java.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(String hex) {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 String bytesToHexString(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 Object bytesToObject(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 String objectToHexString(Serializable s) throws IOException{ return bytesToHexString(objectToBytes(s));}public static final Object hexStringToObject(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(String origin) {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(String origin){ 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];}}}。