随机生成imei imsi mac

	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();
	}