生成随机密码

public Integer getRandomInt(int num) {

//将传来的num组装成0-num的list集合

List valueRange=new ArrayList();

if (num!=0){

valueRange= assembleList(num);

}else{//若未定义长度，取当前时间分分钟数+10作为种子

Calendar now = Calendar.getInstance();

int temp=now.get(Calendar.MINUTE)+10;//防止0分

valueRange=assembleList(temp);

}

Collections.shuffle(valueRange);//打乱集合

return valueRange.get(0);//取打乱后的第一个值作为随机数

}

//组装成num长度的list集合

public List assembleList(int num){

List reslist=new ArrayList();

for(int i=0;i

reslist.add(i);

}

return reslist;

}

int rondomNum=(getRandomInt(16))%9 +8;

int maxNum=80;

int i;

int count=0;

char[] str={'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',

'0','1','2','3','4','5','6','7','8','9',

'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',

'-','.','~','!','@','#','$','%','^','&','*','(',')','_',':','<','>','?'};

StringBuffer newPSW=new StringBuffer("");

while(count<rondomNum){

i= Math.abs(getRandomInt(maxNum));

if(i>=0&&i <str.length){

newPSW.append(str[i]);

count++;

}