package com.wpn.net.util;

public class NumberChange {
	/*
	 * 把16進位制字串轉換成位元組陣列 @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;
	}

	/**
	 * 把位元組陣列轉換成16進位制字串
	 * 
	 * @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();
	}

	/**
	 * @函式功能: BCD碼轉為10進位制串(阿拉伯資料)
	 * @輸入引數: BCD碼
	 * @輸出結果: 10進位制串
	 */
	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();
	}
	/**
	 * @函式功能: 10進位制串轉為BCD碼
	 * @輸入引數: 10進位制串
	 * @輸出結果: BCD碼
	 */
	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;
	}

	public static void main(String[] arg) {
		/**
		 * 68 65 6C 6C 6 F 0A
		 * C4 E3 BA C3
		 */
		String[] str = {"C4", "E3", "BA", "C3"};
//		String[] str = {"7E","02","04","00","07","10","00","00","00","00","13","08","4F","01","0B","0B","15","10","14","13","44","7E"};
		byte[] b = new byte[str.length];
		for(int i=0;i<str.length;i++){
			b[i] = hexStringToByte(str[i])[0];
		}
		System.out.println(new String(b));
		
		
		String strC	="你好";
		String bth=bytesToHexString(strC.getBytes());
	   	System.out.println(bth);
		System.out.println(Short.MAX_VALUE);
		System.out.println(Integer.toBinaryString(280));
	}
}