HexFormatUtil.java
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/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package io.mycat.util;
/**
* @author mycat
*/
public final class HexFormatUtil {
private final static char[] hexArray = "0123456789ABCDEF".toCharArray();
public static String bytesToHexString(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for ( int j = 0; j < bytes.length; j++ ) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}
public static byte[] fromHex(String src) {
String[] hex = src.split(" ");
byte[] b = new byte[hex.length];
for (int i = 0; i < hex.length; i++) {
b[i] = (byte) (Integer.parseInt(hex[i], 16) & 0xff);
}
return b;
}
public static String fromHex(String hexString, String charset) {
try {
byte[] b = fromHex(hexString);
if (charset == null) {
return new String(b);
}
return new String(b, charset);
} catch (Exception e) {
return null;
}
}
public static int fromHex2B(String src) {
byte[] b = fromHex(src);
int position = 0;
int i = (b[position++] & 0xff);
i |= (b[position++] & 0xff) << 8;
return i;
}
public static int fromHex4B(String src) {
byte[] b = fromHex(src);
int position = 0;
int i = (b[position++] & 0xff);
i |= (b[position++] & 0xff) << 8;
i |= (b[position++] & 0xff) << 16;
i |= (b[position++] & 0xff) << 24;
return i;
}
public static long fromHex8B(String src) {
byte[] b = fromHex(src);
int position = 0;
long l = (b[position++] & 0xff);
l |= (long) (b[position++] & 0xff) << 8;
l |= (long) (b[position++] & 0xff) << 16;
l |= (long) (b[position++] & 0xff) << 24;
l |= (long) (b[position++] & 0xff) << 32;
l |= (long) (b[position++] & 0xff) << 40;
l |= (long) (b[position++] & 0xff) << 48;
l |= (long) (b[position++] & 0xff) << 56;
return l;
}
}