hextool.java

冒险岛私服Java版服务端(Odinms)源代码。学习JAVA开发的朋友

/*
	This file is part of the OdinMS Maple Story Server
    Copyright (C) 2008 Patrick Huy <[e-mail]> 
                       Matthias Butz <[e-mail]>
                       Jan Christian Meyer <[e-mail]>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License version 3
    as published by the Free Software Foundation. You may not use, modify
    or distribute this program under any other version of the
    GNU Affero General Public License.

    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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package net.sf.odinms.tools;

import java.io.ByteArrayOutputStream;

import org.apache.mina.common.ByteBuffer;

public class HexTool {
	static private char[] HEX = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

	private HexTool() {

	}

	public static String toString(byte byteValue) {
		int tmp = byteValue << 8;
		char[] retstr = new char[] { HEX[(tmp >> 12) & 0x0F], HEX[(tmp >> 8) & 0x0F] };
		return String.valueOf(retstr);
	}

	public static String toString(ByteBuffer buf) {
		buf.flip();
		byte arr[] = new byte[buf.remaining()];
		buf.get(arr);
		String ret = toString(arr);
		buf.flip();
		buf.put(arr);
		return ret;
	}

	public static String toString(int intValue) {
		return Integer.toHexString(intValue);
	}

	public static String toString(byte[] bytes) {
		StringBuilder hexed = new StringBuilder();
		for (int i = 0; i < bytes.length; i++) {
			hexed.append(toString(bytes[i]));
			hexed.append(' ');
		}
		return hexed.substring(0, hexed.length() - 1);
	}

	public static String toStringFromAscii(byte[] bytes) {
		char[] ret = new char[bytes.length];
		for (int x = 0; x < bytes.length; x++) {
			if (bytes[x] < 32) {
				ret[x] = '.';
			} else {
				ret[x] = (char) bytes[x];
			}
		}
		return String.valueOf(ret);
	}

	public static byte[] getByteArrayFromHexString(String hex) {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		int nexti = 0;
		int nextb = 0;
		boolean highoc = true;
		outer:
		for(;;) {
			int number = -1;
			while (number == -1) {
				if (nexti == hex.length()) {
					break outer;
				}
				char chr = hex.charAt(nexti);
				if (chr >= '0' && chr <= '9') {
					number = chr - '0';
				} else if (chr >= 'a' && chr <= 'f') {
					number = chr - 'a' + 10;
				} else if (chr >= 'A' && chr <= 'F') {
					number = chr - 'A' + 10;
				} else {
					number = -1;
				}
				nexti++;
			}
			if (highoc) {
				nextb = number << 4;
				highoc = false;
			} else {
				nextb |= number;
				highoc = true;
				baos.write(nextb);
			}
		}
		return baos.toByteArray();
	}
}