cn.smallbun.scaffold.framework.common.toolkit.StringUtil Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of scaffold-framework Show documentation

smallbun企业级开发脚手架-核心框架

The newest version!

/*
 * Copyright (c) 2018-2019.‭‭‭‭‭‭‭‭‭‭‭‭[zuoqinggang] www.pingfangushi.com
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */


package cn.smallbun.scaffold.framework.common.toolkit;

/**
 * SanLi
 *
 * @author SanLi
 * Created by [email protected] on 2018/10/25 20:23
 */
public class StringUtil {
	/**
	 * 默认分隔符
	 */
	public static final String SPLIT_DEFAULT = ",";

	/**
	 * byte数组 转 16进制 字符串
	 *
	 * @param b b
	 * @return String
	 */
	public static String byteToHexString(byte[] b) {
		StringBuilder result = new StringBuilder();
		for (byte value : b) {
			String hex = Integer.toHexString(value & 0xFF);
			if (hex.length() == 1) {
				hex = '0' + hex;
			}
			result.append(hex.toUpperCase());
		}
		return result.toString();
	}

	/**
	 * Convert char to byte
	 *
	 * @param c char
	 * @return byte
	 */

	private static byte charToByte(char c) {
		return (byte) "0123456789ABCDEF".indexOf(c);
	}

	/**
	 * 16进制 转 byte数组
	 *
	 * @param hexString hexString
	 * @return byte[]
	 */
	public static byte[] hexStringToBytes(String hexString) {
		if (hexString == null || "".equals(hexString)) {
			return null;
		}
		hexString = hexString.toUpperCase();
		int length = hexString.length() / 2;
		char[] hexChars = hexString.toCharArray();
		byte[] d = new byte[length];
		for (int i = 0; i < length; i++) {
			int pos = i * 2;
			d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
		}
		return d;
	}

}