Question

java如何随机生成6位数的验证码

Answer 1

public static final char[] chars={'1','2','3','4','5','6','7','8','9','0','Q','W','E','R','T','Y','U','I','O',
'P','A','S','D','F','G','H','J','K','L','Z','X','C','V','B','N','M'};
public static Random random=new Random();
public static String getRandomString(){
StringBuffer sb=new StringBuffer();
for(int i=0;i<=5;i++){
sb.append(chars[random.nextInt(chars.length)]);;
}
return sb.toString();
}