stringbytestransformutils.java

来自「通过java方式实现的DESEDE加密算法,其中包括选区择不同的模式与填充方式进」· Java 代码 · 共 47 行

package com.des.test;

/**
 * String-byte[]的转换器
 * 
 * @author Kevin Chen
 * 
 */
public class StringBytesTransformUtils
{

	public static 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();
	}

	public static byte[] hexStringToBytes(String hexString)
	{
		int len = (hexString.length() / 2);
		byte[] result = new byte[len];
		char[] achar = hexString.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;
	}

	public static byte toByte(char c)
	{
		byte b = (byte) "0123456789ABCDEF".indexOf(c);
		return b;
	}

}