java如何随机生成不重复的ip地址？？
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public static String getRandomIp() {
//ip范围
int[][] range = { { 607649792, 608174079 },//36.56.0.0-36.63.255.255
{ 1038614528, 1039007743 },//61.232.0.0-61.237.255.255
{ 1783627776, 1784676351 },//106.80.0.0-106.95.255.255
{ 2035023872, 2035154943 },//121.76.0.0-121.77.255.255
{ 2078801920, 2079064063 },//123.232.0.0-123.235.255.255
{ -1950089216, -1948778497 },//139.196.0.0-139.215.255.255
{ -1425539072, -1425014785 },//171.8.0.0-171.15.255.255
{ -1236271104, -1235419137 },//182.80.0.0-182.92.255.255
{ -770113536, -768606209 },//210.25.0.0-210.47.255.255
{ -569376768, -564133889 }, //222.16.0.0-222.95.255.255
};
Random rdint = new Random();
int index = rdint.nextInt(10);
String ip = num2ip(range[index][0]
+ new Random().nextInt(range[index][1] - range[index][0]));
return ip;
}
public static String num2ip(int ip) {
int[] b = new int[4];
String x = "";
b[0] = (int) ((ip >> 24) & 0xff);
b[1] = (int) ((ip >> 16) & 0xff);
b[2] = (int) ((ip >> 8) & 0xff);
b[3] = (int) (ip & 0xff);
x = Integer.toString(b[0]) + "." + Integer.toString(b[1]) + "."
+ Integer.toString(b[2]) + "." + Integer.toString(b[3]);
return x;
}
}
