不同进制的数字字符串互相转换
是一些数字类型的转换……抄的http://www.agoit.com/images/smiles/icon_biggrin.gif http://www.agoit.com/images/smiles/icon_biggrin.gif http://www.agoit.com/images/smiles/icon_biggrin.gifimport java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;public final class Converts { public final static char[] BToA = "0123456789abcdef".toCharArray() ; private Converts() { } /*** 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;char[] achar = hex.toCharArray();for (int i = 0; i < len; i++) { int pos = i * 2; result = (byte) (toByte(achar) << 4 | toByte(achar));}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); 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& 0xf0)>>>4)); temp.append((byte)(bytes& 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;if (len >= 2) { len = len / 2;}byte bbt[] = new byte;abt = asc.getBytes();int j, k;for (int p = 0; p < asc.length()/2; p++) { if ( (abt >= '0') && (abt <= '9')) { j = abt - '0'; } else if ( (abt >= 'a') && (abt <= 'z')) { j = abt - 'a' + 0x0a; } else { j = abt - 'A' + 0x0a; } if ( (abt >= '0') && (abt <= '9')) { k = abt - '0'; } else if ( (abt >= 'a') && (abt <= 'z')) { k = abt - 'a' + 0x0a; }else { k = abt - 'A' + 0x0a; } int a = (j << 4) + k; byte b = (byte) a; bbt = b;}return bbt; }public static String BCD2ASC(byte[] bytes) {StringBuffer temp = new StringBuffer(bytes.length * 2);for (int i = 0; i < bytes.length; i++) { int h = ((bytes & 0xf0) >>> 4); int l = (bytes & 0x0f); temp.append(BToA).append( BToA);}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;} }}
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