28:密码验证合格

题目描述

密码要求:

1.长度超过8位

2.包括大小写字母.数字.其它符号,以上四种至少三种

3.不能有相同长度超2的子串重复 

说明:长度超过2的子串

输入描述:一组或多组长度超过2的子符串。每组占一行

输出描述:如果符合要求输出：OK，否则输出NG

输入例子:

021Abc9000

021Abc9Abc1

021ABC9000

021$bc9000

输出例子:

OK

NG

NG

OK

package prctice01;

import java.util.Scanner;

/*题目描述
密码要求:
1.长度超过8位
2.包括大小写字母.数字.其它符号,以上四种至少三种
3.不能有相同长度超2的子串重复 
说明:长度超过2的子串
输入描述:一组或多组长度超过2的子符串。每组占一行
输出描述:如果符合要求输出：OK，否则输出NG
输入例子:
021Abc9000
021Abc9Abc1
021ABC9000
021$bc9000
输出例子:
OK
NG
NG
OK*/
public class PasswordCheck {
/*
        // 3.不能有相同长度超2的子串重复
        public static boolean checkCharRepeat(String password){
            for(int i=0 ;i<password.length()-2 ;i++){
                String substr1 =password.substring(i, i+3);
                if (password.substring(i+1).contains(substr1))
                   return false;
            }
            return true;
        }*/
        public static void main(String[] args) {
            Scanner cin = new Scanner(System.in);
            while (cin.hasNextLine()) {
                String psw = cin.nextLine();
                if (checkLength(psw) && checkString(psw) && checkSubString(psw))
                    System.out.println("OK");
                else
                    System.out.println("NG");
            }
        }
        public static boolean checkLength(String psw)
        {
            if(psw==null || psw.isEmpty() || psw.length()<=8 )
            return false;
            return true;
        }
        public static boolean checkString(String psw)
        {
            int num = 0, upper = 0, lower = 0, others = 0;
            char[] input = psw.toCharArray();
            for(int i = 0;i<psw.length();i++)
            {
                 if(input[i]<'9' && input[i]>'0')
                {
                    num=1;
                    continue;
                }
                 else if(input[i]<'Z' && input[i]>'A')
                {
                    upper=1;
                    continue;
                }
                else if(input[i]<'z' && input[i]>'a')
                {
                    lower=1;
                    continue;
                }
                else
                {
                    others=1;
                    continue;
                }
            }
            int total = num+upper+lower+others;
            return (total>=3) ? true:false;
        }
        private static boolean checkSubString(String psw)
        {
            for(int i = 0;i<psw.length()-2;i++)
            {
                String sub = psw.substring(i,i+3);
                if(psw.substring(i+1).contains(sub)){
                    return false;
                }
            }
            return true;
        }
}
/*public boolean isContentQualified(String s){
        int count=0;
        String[] str={"[a-z]","[A-Z]","[0-9]","[^a-zA-Z0-9]"};
        for(int i=0;i<str.length;i++){
            Pattern p=Pattern.compile(str[i]);
            Matcher m=p.matcher(s);
            if(m.find())
                count++;
        }
        return count>=3;
         
    }*/