隨機生成 imsi imei mac

http://blog.csdn.net/argonwu/article/details/42971909

private static String getIMEI() {// calculator IMEI

int r1 = 1000000 + new java.util.Random().nextInt(9000000);
int r2 = 1000000 + new java.util.Random().nextInt(9000000);
String input = r1 + "" + r2;
char[] ch = input.toCharArray();
int a = 0, b = 0;
for (int i = 0; i < ch.length; i++) {
int tt = Integer.parseInt(ch[i] + "");
if (i % 2 == 0) {
a = a + tt;
} else {
int temp = tt * 2;
b = b + temp / 10 + temp % 10;
}
}
int last = (a + b) % 10;
if (last == 0) {
last = 0;
} else {
last = 10 - last;
}
return input + last;
}


private static String getImsi() {
// 460022535025034
String title = "4600";
int second = 0;
do {
second = new java.util.Random().nextInt(8);
} while (second == 4);
int r1 = 10000 + new java.util.Random().nextInt(90000);
int r2 = 10000 + new java.util.Random().nextInt(90000);
return title + "" + second + "" + r1 + "" + r2;
}
private static String getMac(){
char[] char1 = "abcdef".toCharArray();
char[] char2 = "0123456789".toCharArray();
StringBuffer mBuffer = new StringBuffer();
for (int i = 0; i < 6; i++) {
int t = new java.util.Random().nextInt(char1.length);
int y = new java.util.Random().nextInt(char2.length);
int key = new java.util.Random().nextInt(2);
if (key ==0) {
mBuffer.append(char2[y]).append(char1[t]);
}else {
mBuffer.append(char1[t]).append(char2[y]);
}

if (i!=5) {
mBuffer.append(":");
}
}
return mBuffer.toString();
}