- java二进制,字节数组,字符,十六进制,BCD编码转换2007-06-07 00:17/** *//**
- * 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));
- }
- return temp.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];
- }