com.dc.gameserver.extComponents.Kit.ip.Util.java Source code

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Here is the source code for com.dc.gameserver.extComponents.Kit.ip.Util.java

Source

/*
 * Copyright (c) 2014. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
 * http://www.apache.org/licenses/LICENSE-2.0
 */

package com.dc.gameserver.extComponents.Kit.ip;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.io.UnsupportedEncodingException;
import java.util.StringTokenizer;

/**
 * ??
 */
public class Util {
    private static Log log = LogFactory.getLog(Util.class); //WorldLogger

    /**
     * ip??
     * 
     * @param ip
     *            ?ip
     * @return ?ip
     */
    public static byte[] getIpByteArrayFromString(String ip) {
        byte[] ret = new byte[4];
        StringTokenizer st = new StringTokenizer(ip, ".");
        try {
            ret[0] = (byte) (Integer.parseInt(st.nextToken()) & 0xFF);
            ret[1] = (byte) (Integer.parseInt(st.nextToken()) & 0xFF);
            ret[2] = (byte) (Integer.parseInt(st.nextToken()) & 0xFF);
            ret[3] = (byte) (Integer.parseInt(st.nextToken()) & 0xFF);
        } catch (Exception e) {
            log.info("ip??");
        }
        return ret;
    }

    /**
     * @param ip
     *            ip?
     * @return ?ip
     */
    public static String getIpStringFromBytes(byte[] ip) {
        try {
            StringBuffer sb = new StringBuffer();
            sb.delete(0, sb.length());
            sb.append(ip[0] & 0xFF);
            sb.append('.');
            sb.append(ip[1] & 0xFF);
            sb.append('.');
            sb.append(ip[2] & 0xFF);
            sb.append('.');
            sb.append(ip[3] & 0xFF);
            return sb.toString();
        } catch (Exception e) {
            return "";
        }
    }

    /**
     * ???????
     * 
     * @param b
     *            
     * @param offset
     *            ???
     * @param len
     *            ??
     * @param encoding
     *            ??
     * @return encoding????
     */
    public static String getString(byte[] b, int offset, int len, String encoding) {
        try {
            return new String(b, offset, len, encoding);
        } catch (UnsupportedEncodingException e) {
            return new String(b, offset, len);
        }
    }
}