Javaip转换int ip转int java

/**
 * @author SunChong
 */
public class IpUtil {

    /**
     * 将字符串型ip转成int型ip
     * @param strIp
     * @return
     */
    public static int Ip2Int(String strIp){
        String[] ss = strIp.split("\\.");
        if(ss.length != 4){
            return 0;
        }
        byte[] bytes = new byte[ss.length];
        for(int i = 0; i < bytes.length; i++){
            bytes[i] = (byte) Integer.parseInt(ss[i]);
        }
        return byte2Int(bytes);
    }
    /**
     * 将int型ip转成String型ip
     * @param intIp
     * @return
     */
    public static String int2Ip(int intIp){
        byte[] bytes = int2byte(intIp);
        StringBuilder sb = new StringBuilder();
        for(int i = 0; i < 4; i++){
            sb.append(bytes[i] & 0xFF);
            if(i < 3){
                sb.append(".");
            }
        }
        return sb.toString();
    }

    private static byte[] int2byte(int i) {
        byte[] bytes = new byte[4];
        bytes[0] = (byte) (0xff & i);
        bytes[1] = (byte) ((0xff00 & i) >> 8);
        bytes[2] = (byte) ((0xff0000 & i) >> 16);
        bytes[3] = (byte) ((0xff000000 & i) >> 24);
        return bytes;
    }
    private static int byte2Int(byte[] bytes) {
        int n = bytes[0] & 0xFF;
        n |= ((bytes[1] << 8) & 0xFF00);
        n |= ((bytes[2] << 16) & 0xFF0000);
        n |= ((bytes[3] << 24) & 0xFF000000);
        return n;
    }

    public static void main(String[] args) {
        String ip1 = "192.168.0.1";
        int intIp = Ip2Int(ip1);
        String ip2 = int2Ip(intIp);
        System.out.println(ip2.equals(ip1));
    }
}