生成6位不重复的验证码

public static void main(String[] args) {
	int[] array = {0,1,2,3,4,5,6,7,8,9};
	Random rand = new Random();
	for (int i = 10; i > 1; i--) {
		int index = rand.nextInt(i);
		int tmp = array[index];
		array[index] = array[i - 1];
		array[i - 1] = tmp;
	}
	int result = 0;
	for(int i = 0; i < 6; i++)
		result = result * 10 + array[i];
	System.out.println(result);

}

 参考：http://bbs.csdn.net/topics/320148022