package com.hxzkoa.util;

public class BytesToHex {
	/**
	 * byte数组 转换成 16进制小写字符串
	 */
	public static String bytesToHex(byte[] bytes) {
		if (bytes == null || bytes.length == 0) {
			return null;
		}

		StringBuilder hex = new StringBuilder();

		for (byte b : bytes) {
			hex.append(HEXES[(b >> 4) & 0x0F]);
			hex.append(HEXES[b & 0x0F]);
		}

		return hex.toString();
	}

	private static final char[] HEXES = {
			'0', '1', '2', '3',
			'4', '5', '6', '7',
			'8', '9', 'a', 'b',
			'c', 'd', 'e', 'f'
	};

}