java输入IP地址判断地址类型

IP地址划分为 A,B,C,D,E五类

A类地址1.0.0.0~126.255.255.255;

B类地址128.0.0.0~191.255.255.255;

C类地址192.0.0.0~223.255.255.255;

D类地址224.0.0.0~239.255.255.255；

E类地址240.0.0.0~255.255.255.255

私网IP范围是：

10.0.0.0～10.255.255.255

172.16.0.0～172.31.255.255

192.168.0.0～192.168.255.255

 // 1代表A类，2代表B类，3代表C类；4代表其它类型
    public final static int IP_A_TYPE = 1;
    public final static int IP_B_TYPE = 2;
    public final static int IP_C_TYPE = 3;
    public final static int IP_OTHER_TYPE = 4;

    // A类地址范围：1.0.0.1---126.255.255.254
    private static int[] IpATypeRange;
    // B类地址范围：128.0.0.1---191.255.255.254
    private static int[] IpBTypeRange;
    // C类地址范围：192.168.0.0～192.168.255.255
    private static int[] IpCTypeRange;

    // A,B,C类地址的默认mask
    private static int DefaultIpAMask;
    private static int DefaultIpBMask;
    private static int DefaultIpCMask;

    // 初始化
    static {
        IpATypeRange = new int[2];
        IpATypeRange[0] = getIpV4Value("1.0.0.1");
        IpATypeRange[1] = getIpV4Value("126.255.255.254");

        IpBTypeRange = new int[2];
        IpBTypeRange[0] = getIpV4Value("128.0.0.1");
        IpBTypeRange[1] = getIpV4Value("191.255.255.254");

        IpCTypeRange = new int[2];
        IpCTypeRange[0] = getIpV4Value("192.168.0.0");
        IpCTypeRange[1] = getIpV4Value("192.168.255.255");

        DefaultIpAMask = getIpV4Value("255.0.0.0");
        DefaultIpBMask = getIpV4Value("255.255.0.0");
        DefaultIpCMask = getIpV4Value("255.255.255.0");
    }


    public static int getIpV4Value(String ipOrMask) {
        byte[] addr = getIpV4Bytes(ipOrMask);
        int address1 = addr[3] & 0xFF;
        address1 |= ((addr[2] << 8) & 0xFF00);
        address1 |= ((addr[1] << 16) & 0xFF0000);
        address1 |= ((addr[0] << 24) & 0xFF000000);
        return address1;
    }


    public static byte[] getIpV4Bytes(String ipOrMask) {
        try {

            String[] addrs = ipOrMask.split("\\.");
            int length = addrs.length;
            byte[] addr = new byte[length];
            for (int index = 0; index < length; index++) {
                addr[index] = (byte) (Integer.parseInt(addrs[index]) & 0xff);
            }
            return addr;
        } catch (Exception e) {
        }
        return new byte[4];
    }


    /**
     * 检测ipV4 的类型，包括A类，B类，C类，其它（C,D和广播）类等
     *
     * @param ipV4
     * @return 返回1代表A类，返回2代表B类，返回3代表C类；返回4代表D类
     */
    public static int checkIpV4Type(String ipV4) {
        int inValue = getIpV4Value(ipV4);
        if (inValue >= IpCTypeRange[0] && inValue <= IpCTypeRange[1]) {
            return IP_C_TYPE;
        } else if (inValue >= IpBTypeRange[0] && inValue <= IpBTypeRange[1]) {
            return IP_B_TYPE;
        } else if (inValue >= IpATypeRange[0] && inValue <= IpATypeRange[1]) {
            return IP_A_TYPE;
        }
        return IP_OTHER_TYPE;
    }




    public static void main(String[] args) {
        System.out.println(checkIpV4Type("191.255.255.254"));//输出2 对应是B类地址
    }