java二进制字节数组字符十六进制BCD编码转换

long5279 贡献于2012-03-21

作者 shma  创建于2010-10-16 08:58:00   修改者shma  修改于2010-10-16 09:01:00字数3480

文档摘要:java二进制字节数组字符十六进制BCD编码转换
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 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>>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]; } } }

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