Java字符ip地址和数字ip地址之间的相互转换，java相互转换,package com.

Java字符ip地址和数字ip地址之间的相互转换，java相互转换,package com.

package com.hxhk.cc.util;import java.util.regex.Matcher;import java.util.regex.Pattern;public class IPAddressFormatter {    private static final long serialVersionUID = 1364280016493483133L;    private final static int Num = 32;    /**     * 判断点分十进制IP地址是否正确     * @param str     * @return     */    public static boolean isIP(String str){         Pattern p= Pattern.compile("^([1-9]|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])(\\.(\\d|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])){3}$");        Matcher m =p.matcher(str);        return m.matches();    }    /**     * 将127.0.0.1 形式的IP地址转换成10进制整数，这里没有进行任何错误处理     *      * @param strIP     * @return     */    public static long ipToLong(String strIP) {        long[] ip = new long[4];        int position1 = strIP.indexOf(".");        int position2 = strIP.indexOf(".", position1 + 1);        int position3 = strIP.indexOf(".", position2 + 1);        ip[0] = Long.parseLong(strIP.substring(0, position1));        ip[1] = Long.parseLong(strIP.substring(position1 + 1, position2));        ip[2] = Long.parseLong(strIP.substring(position2 + 1, position3));        ip[3] = Long.parseLong(strIP.substring(position3 + 1));        long value = (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];        return value; // ip1*256*256*256+ip2*256*256+ip3*256+ip4    }    /**     * 将10进制整数形式转换成127.0.0.1形式的IP地址     * @param longIP     * @return     */    public static String longToIP(long longIP) {        StringBuffer sb = new StringBuffer("");        sb.append(String.valueOf(longIP >>> 24));// 直接右移24位        sb.append(".");        sb.append(String.valueOf((longIP & 0x00FFFFFF) >>> 16)); // 将高8位置0，然后右移16位        sb.append(".");        sb.append(String.valueOf((longIP & 0x0000FFFF) >>> 8));        sb.append(".");        sb.append(String.valueOf(longIP & 0x000000FF));        return sb.toString();    }    /**     * 根据子网网络位数计算子网掩码（2进制）     * @param num     * @return String     */    public static String SubNumToBinSubMask(int num) {        StringBuffer sb = new StringBuffer();        int location = 0;        for (; num > 0; num--, location++) {            sb.append(String.valueOf(1));        }        for (; location < Num; location++) {            sb.append(String.valueOf(0));        }        return sb.toString();    }    /**     * 根据２进制IP地址得到点分十进制表示IP地址     * @param ipAddress     * @return String     */    public static String BinIPToLong(String ipAddress) {        StringBuffer sb = new StringBuffer();        Long ip = Long.parseLong(ipAddress, 2);        return longToIP(ip);    }    /**     * 根据二进制IP地址、子网掩码 获得二进制子网地址     * @param iplist 二进制IP地址     * @param sublist 二进制子网掩码      * @return String 点分十进制子网掩码      */    public static String getSubnetAddress(char[] iplist,char[] sublist) {        StringBuffer sb = new StringBuffer("");        int value = 0;        int length = (iplist.length>sublist.length)?sublist.length:iplist.length;        int i = 0;        int j = Math.abs(iplist.length-sublist.length);        for (; i < length; i++,j++) {            value = Integer.parseInt(String.valueOf(iplist[i]))& Integer.parseInt(String.valueOf(sublist[j]));            sb.append(value);        }        return BinIPToLong(sb.toString());    }    /**     * 根据IP地址(点分十进制)、子网网络位数获得子网地址     * @param num     * @param ipAddress IP地址(点分十进制)     * @return String 点分十进制子网     */    public static String getSubnetAddress(int num,String ipAddress) {        String binSubIPAddress = SubNumToBinSubMask(num);        String ip = Long.toBinaryString(ipToLong(ipAddress));        StringBuilder sb = new StringBuilder(ip);        return getSubnetAddress(sb.toString().toCharArray(),binSubIPAddress.toCharArray());    }    /**     * 根据IP地址(十进制)、子网网络位数获得子网地址     * @param num 子网网络位数     * @param ipAddress IP地址(十进制)     * @return  String 点分十进制子网     */    public static String getSubnetAddress(int num,long ipAddress) {        String binSubIPAddress = SubNumToBinSubMask(num);        String ip = Long.toBinaryString(ipAddress);        StringBuilder sb = new StringBuilder(ip);        return getSubnetAddress(sb.toString().toCharArray(),binSubIPAddress.toCharArray());    }    /**     * 根据子网地址(十进制)、子网网络位数获得网段最后的IP地址     * @param num     * @param ip     * @return  String 点分十进制子网     */    public static String getEndSubnetAddress(int num,String ip) {        String ipAddress = Long.toBinaryString(ipToLong(ip));        StringBuilder sb = new StringBuilder();        for(int i=0;i<Num-ipAddress.length();i++){            sb.append("0");        }        sb.append(ipAddress);        char[] valuelist = sb.toString().toCharArray();        for(int k=num;k<Num && k<valuelist.length;k++)        {            valuelist[k]='1';        }        return BinIPToLong(String.valueOf(valuelist));    }    /**     * 根据子网地址(十进制)、子网网络位数获得网段最后的IP地址     * @param num 子网网络位数     * @param ip 子网地址(十进制)     * @return String 点分十进制     */    public static String getEndSubnetAddress(int num,long ip) {        String ipAddress = Long.toBinaryString(ip);        StringBuilder sb = new StringBuilder();        for(int i=0;i<Num-ipAddress.length();i++){            sb.append("0");        }        sb.append(ipAddress);        char[] valuelist = sb.toString().toCharArray();        for(int k=num;k<Num && k<valuelist.length;k++)        {            valuelist[k]='1';        }        return BinIPToLong(String.valueOf(valuelist));    }    public static void main(String[] args) {    }}