字节数组转换为16进制字符串

/**
 * 2011-04-26
 * @author chase
 * 字节数组转换为16进制字符串
 */
public class BytetoHex {
	
	public static final String encodeHex(byte[] bytes) {
		StringBuffer buf = new StringBuffer(bytes.length * 2);
		
		for (int i = 0; i < bytes.length; i++) {
			if (((int)bytes[i] & 0xff) < 0x10) {
				buf.append("0");
			}
			buf.append(Long.toString((int)bytes[i] & 0xff, 16));
		}
		return buf.toString(); 
	}

	public static void main(String[] args) {
		byte By[]={34,12,4,-6,-8,55,127,88}; 
        System.out.println(encodeHex(By)); 
	}

}