org.javaweb.utils.HexUtils.java Source code

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Here is the source code for org.javaweb.utils.HexUtils.java

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/*
 * Copyright yz 2016-01-14  Email:admin@javaweb.org.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.javaweb.utils;

import org.apache.commons.codec.binary.Hex;
import org.apache.commons.io.HexDump;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * ?? String?Hex?byte?
 *
 * @author yz
 */
public class HexUtils extends Hex {

    /**
     * byte??
     *
     * @param bytes byte[]
     * @return String
     */
    public static String bytes2HexString(byte[] bytes) {
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < bytes.length; i++) {
            String hex = Integer.toHexString(bytes[i] & 0xFF);
            sb.append(hex.length() == 1 ? '0' + hex : hex.toUpperCase());
        }

        return sb.toString();
    }

    /**
     * String??
     *
     * @param s
     * @return
     */
    public static String string2Hex(String s) {
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < s.length(); i++) {
            sb.append(Integer.toHexString((int) s.charAt(i)));
        }

        return sb.toString();
    }

    /**
     * ??ascii
     *
     * @param str
     * @return
     */
    public static String hex2String(String str) {
        StringBuilder sb = new StringBuilder();

        for (int i = 0; i < str.length() - 1; i += 2) {
            String s = String.valueOf(str.charAt(i)) + str.charAt(i + 1);
            sb.append((char) Integer.parseInt(s, 16));
        }

        return sb.toString();
    }

    /**
     * ???
     *
     * @param s
     * @return
     */
    public static byte[] hex2Bytes(String s) {
        byte[] bytes = new byte[s.length() / 2];

        for (int i = 0; i < bytes.length; i++) {
            bytes[i] = (byte) Integer.parseInt(s.substring(2 * i, 2 * i + 2), 16);
        }

        return bytes;
    }

    /**
     * Hexdump ??ASCII?
     *
     * @param data
     * @return
     */
    public static byte[] hexDump(byte[] data) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        try {
            HexDump.dump(data, data.length, baos, 0);
        } catch (ArrayIndexOutOfBoundsException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return baos.toByteArray();
    }

    /**
     * SqlServer hexSQL?
     * :select CAST(0x00009EB001628DF4 AS DateTime) ?
     * select CAST('2011-03-24 21:30:53.613' AS DateTime)
     *
     * @param sqlLine
     * @return
     * @throws ParseException
     */
    public static String replaceHexWithDate(String sqlLine) throws ParseException {
        Pattern castPattern = Pattern.compile("(CAST\\()(0x[A-Fa-f0-9]{16})( AS DateTime\\))");
        Matcher m = castPattern.matcher(sqlLine);

        while (m.find()) {
            String s = m.group(2);
            sqlLine = sqlLine.replace(s, "'" + sqlServerHexToSqlDate(s) + "'");
        }

        return sqlLine;
    }

    /**
     * SqlServer hex
     *
     * @param hexString
     * @return
     * @throws ParseException
     */
    public static String sqlServerHexToSqlDate(String hexString) throws ParseException {
        return sqlServerHexToSqlDate(hexString, "yyyy-MM-dd HH:mm:ss.SSS");
    }

    /**
     * SqlServer hex
     * ?:http://stackoverflow.com/questions/4946292/how-to-cast-the-hexadecimal-to-varchardatetime
     *
     * @param hexString
     * @param dateFormat ? :yyyy-MM-dd HH:mm:ss
     * @return
     * @throws ParseException
     */
    public static String sqlServerHexToSqlDate(String hexString, String dateFormat) throws ParseException {
        String hexNumber = hexString.substring(2);// 0x
        String dateHex = hexNumber.substring(0, 8);
        String timeHex = hexNumber.substring(8, 16);
        long daysToAdd = Long.parseLong(dateHex, 16);// 190011
        long millisToAdd = Long.parseLong(timeHex, 16) * 10 / 3;
        SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
        Calendar startingCal = Calendar.getInstance();
        String startingDate = "1900-01-01 00:00:00.000";

        startingCal.setTime(sdf.parse(startingDate));

        Calendar convertedCal = Calendar.getInstance();
        convertedCal.setTime(sdf.parse(startingDate));
        convertedCal.add(Calendar.DATE, (int) daysToAdd);
        convertedCal.setTimeInMillis(convertedCal.getTimeInMillis() + millisToAdd);

        return sdf.format(convertedCal.getTime());
    }

}