HexStrUtil.java

package com.cyou.cpush.apns.util;

public class HexStrUtil {

	public static String str2HexStr(String str) {

		char[] chars = "0123456789ABCDEF".toCharArray();

		StringBuilder sb = new StringBuilder("");

		byte[] bs = str.getBytes();

		int bit;

		for (int i = 0; i < bs.length; i++) {

			bit = (bs[i] & 0x0f0) >> 4;

			sb.append(chars[bit]);

			bit = bs[i] & 0x0f;

			sb.append(chars[bit]);

		}

		return sb.toString();

	}

	/**
	 * 
	 * 十六进制转换字符串
	 */

	public static String hexStr2Str(String hexStr) {

		String str = "0123456789ABCDEF";

		char[] hexs = hexStr.toCharArray();

		byte[] bytes = new byte[hexStr.length() / 2];

		int n;

		for (int i = 0; i < bytes.length; i++) {

			n = str.indexOf(hexs[2 * i]) * 16;

			n += str.indexOf(hexs[2 * i + 1]);

			bytes[i] = (byte) (n & 0xff);

		}

		return new String(bytes);

	}

	/**
	 * bytes转换成十六进制字符串
	 */
	public static String byte2HexStr(byte[] b) {
		String hs = "";
		String stmp = "";
		for (int n = 0; n < b.length; n++) {
			stmp = (Integer.toHexString(b[n] & 0XFF));
			if (stmp.length() == 1)
				hs = hs + "0" + stmp;
			else
				hs = hs + stmp;
			// if (n<b.length-1) hs=hs+":";
		}
		return hs.toUpperCase();
	}

	private static byte uniteBytes(String src0, String src1) {
		byte b0 = Byte.decode("0x" + src0).byteValue();
		b0 = (byte) (b0 << 4);
		byte b1 = Byte.decode("0x" + src1).byteValue();
		byte ret = (byte) (b0 | b1);
		return ret;
	}

	/**
	 * bytes转换成十六进制字符串
	 */
	public static byte[] hexStr2Bytes(String src) {
		int m = 0, n = 0;
		int l = src.length() / 2;
		byte[] ret = new byte[l];
		for (int i = 0; i < l; i++) {
			m = i * 2 + 1;
			n = m + 1;
			ret[i] = uniteBytes(src.substring(i * 2, m), src.substring(m, n));
		}
		return ret;
	}

	/**
	 * String的字符串转换成unicode的String
	 */
	public static String stringToUnicode(String strText) throws Exception {
		char c;
		String strRet = "";
		int intAsc;
		String strHex;
		for (int i = 0; i < strText.length(); i++) {
			c = strText.charAt(i);
			intAsc = (int) c;
			strHex = Integer.toHexString(intAsc);
			if (intAsc > 128) {
				strRet += "\\u" + strHex;
			} else {
				// 低位在前面补00
				strRet += "\\" + strHex;
			}
		}
		return strRet;
	}

}