package kernel.util;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.Serializable;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class ConvertUtil {
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public final static char[] BToA = "0123456789abcdef".toCharArray();
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private ConvertUtil() {}
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/**
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* 把16进制字符串转换成字节数组
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*
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* @param hex
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* @return
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*/
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public static byte[] hexStringToByte(String hex) {
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int len = (hex.length() / 2);
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byte[] result = new byte[len];
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char[] achar = hex.toCharArray();
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for (int i = 0; i < len; i++) {
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int pos = i * 2;
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result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1]));
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}
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return result;
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}
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private static byte toByte(char c) {
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byte b = (byte) "0123456789ABCDEF".indexOf(c);
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return b;
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}
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/**
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* 把字节数组转换成16进制字符串
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*
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* @param bArray
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* @return
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*/
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public static final String bytesToHexString(byte[] bArray) {
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if (bArray == null) {
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return "";
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}
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StringBuffer sb = new StringBuffer(bArray.length);
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String sTemp;
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for (int i = 0; i < bArray.length; i++) {
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sTemp = Integer.toHexString(0xFF & bArray[i]);
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if (sTemp.length() < 2)
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sb.append(0);
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sb.append(sTemp.toUpperCase());
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}
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return sb.toString();
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}
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/**
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* 把字节数组转换为对象
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*
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* @param bytes
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* @return
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* @throws IOException
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* @throws ClassNotFoundException
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*/
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public static final Object bytesToObject(byte[] bytes) throws IOException, ClassNotFoundException {
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ByteArrayInputStream in = new ByteArrayInputStream(bytes);
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ObjectInputStream oi = new ObjectInputStream(in);
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Object o = oi.readObject();
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oi.close();
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return o;
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}
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/**
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* 把可序列化对象转换成字节数组
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*
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* @param s
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* @return
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* @throws IOException
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*/
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public static final byte[] objectToBytes(Serializable s) throws IOException {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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ObjectOutputStream ot = new ObjectOutputStream(out);
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ot.writeObject(s);
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ot.flush();
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ot.close();
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return out.toByteArray();
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}
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public static final String objectToHexString(Serializable s) throws IOException {
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return bytesToHexString(objectToBytes(s));
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}
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public static final Object hexStringToObject(String hex) throws IOException, ClassNotFoundException {
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return bytesToObject(hexStringToByte(hex));
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}
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/**
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* @函数功能: BCD码转为10进制串(阿拉伯数据)
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* @输入参数: BCD码
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* @输出结果: 10进制串
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*/
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public static String bcd2Str(byte[] bytes) {
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StringBuffer temp = new StringBuffer(bytes.length * 2);
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for (int i = 0; i < bytes.length; i++) {
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temp.append((byte) ((bytes[i] & 0xf0) >>> 4));
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temp.append((byte) (bytes[i] & 0x0f));
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}
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return temp.toString().substring(0, 1).equalsIgnoreCase("0") ? temp.toString().substring(1) : temp.toString();
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}
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/**
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* @函数功能: 10进制串转为BCD码
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* @输入参数: 10进制串
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* @输出结果: BCD码
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*/
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public static byte[] str2Bcd(String asc) {
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int len = asc.length();
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int mod = len % 2;
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if (mod != 0) {
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asc = "0" + asc;
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len = asc.length();
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}
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byte abt[] = new byte[len];
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if (len >= 2) {
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len = len / 2;
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}
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byte bbt[] = new byte[len];
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abt = asc.getBytes();
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int j, k;
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for (int p = 0; p < asc.length() / 2; p++) {
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if ((abt[2 * p] >= '0') && (abt[2 * p] <= '9')) {
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j = abt[2 * p] - '0';
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} else if ((abt[2 * p] >= 'a') && (abt[2 * p] <= 'z')) {
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j = abt[2 * p] - 'a' + 0x0a;
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} else {
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j = abt[2 * p] - 'A' + 0x0a;
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}
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if ((abt[2 * p + 1] >= '0') && (abt[2 * p + 1] <= '9')) {
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k = abt[2 * p + 1] - '0';
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} else if ((abt[2 * p + 1] >= 'a') && (abt[2 * p + 1] <= 'z')) {
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k = abt[2 * p + 1] - 'a' + 0x0a;
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} else {
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k = abt[2 * p + 1] - 'A' + 0x0a;
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}
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int a = (j << 4) + k;
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byte b = (byte) a;
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bbt[p] = b;
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}
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return bbt;
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}
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public static String BCD2ASC(byte[] bytes) {
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StringBuffer temp = new StringBuffer(bytes.length * 2);
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for (int i = 0; i < bytes.length; i++) {
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int h = ((bytes[i] & 0xf0) >>> 4);
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int l = (bytes[i] & 0x0f);
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temp.append(BToA[h]).append(BToA[l]);
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}
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return temp.toString();
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}
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/**
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* 两字符数组异或
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*/
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public static byte[] byteArrXor(byte[] arr1, byte[] arr2, int len) {
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byte[] dest = new byte[len];
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if ((arr1.length < len) || (arr2.length < len)) {
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return null;
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}
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for (int i = 0; i < len; i++) {
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dest[i] = (byte) (arr1[i] ^ arr2[i]);
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}
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return dest;
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}
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/**
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* MD5加密字符串，返回加密后的16进制字符串
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*
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* @param origin
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* @return
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*/
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public static String MD5EncodeToHex(String origin) {
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return bytesToHexString(MD5Encode(origin));
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}
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/**
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* MD5加密字符串，返回加密后的字节数组
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*
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* @param origin
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* @return
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*/
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public static byte[] MD5Encode(String origin) {
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return MD5Encode(origin.getBytes());
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}
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/**
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* MD5加密字节数组，返回加密后的字节数组
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*
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* @param bytes
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* @return
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*/
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public static byte[] MD5Encode(byte[] bytes) {
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MessageDigest md = null;
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try {
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md = MessageDigest.getInstance("MD5");
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return md.digest(bytes);
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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return new byte[0];
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}
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}
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}
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