签到功能二进制实现

思路

一个月最多31天，四个字节有32位，每个bit位代表一天，签到则置为1，默认是0代表没签到

例：

import java.util.Calendar;

/**
 * 签到工具类
 */
public class SigningManager {

    private int element;

    public SigningManager() {
        this.element = 0;
    }

    /**
     * 当天签到
     *
     * @return 签到成功true, 失败false
     */
    public boolean signToday() {
        int dayOfMonth = Calendar.getInstance().get(Calendar.DAY_OF_MONTH);
        int old = this.element;
        element |= 1 << (dayOfMonth - 1);
        return element != old;
    }

    public boolean signToday(int day) {
        int old = this.element;
        element |= 1 << (day - 1);
        return element != old;
    }

    /**
     * 查询当月某天是否签到
     *
     * @param dayOfMonth 当月第几天
     * @return 签到返回true, 否则false
     */
    public boolean getSignStatus(int dayOfMonth) {
        return (element & (1 << (dayOfMonth - 1))) != 0;
    }

    /**
     * @return 当月签到次数
     */
    public int getSignDays() {
        return Integer.bitCount(element);
    }

    /**
     * 统计连续签到天数的次数
     *
     * @param day
     * @return
     */
    public int continuousNumber(int day) {
        String str = intToBinary32(element, 32);
        int count = 0;
        int num = 0;
        for (int i = 0; i < str.length(); i++) {
            if (str.charAt(i) == '1') {
                num++;
            } else {
                num = 0;
            }
            if (num == day) {
                count++;
                num = 0;
            }
        }
        return count;
    }

    public static String intToBinary32(int i, int bitNum) {
        StringBuilder binaryStr = new StringBuilder(Integer.toBinaryString(i));
        while (binaryStr.length() < bitNum) {
            binaryStr.insert(0, "0");
        }
        return binaryStr.toString();
    }

    public static void main(String[] args) {
//        //A=26
//        //0000 0000 0000 0000 0000 0000 0001 1010
//        //00000000000000000000000000011010
//
//        SigningManager signingManager = new SigningManager();
//        signingManager.element = 26;
//
//        System.out.println(intToBinary32(signingManager.element, 32));
//
//        System.out.println(intToBinary32(1 << (1 - 1), 32));
//        System.out.println(intToBinary32(1 << (2 - 1), 32));
//        System.out.println(intToBinary32(1 << (3 - 1), 32));
//        System.out.println(intToBinary32(1 << (4 - 1), 32));
//        System.out.println(intToBinary32(1 << (5 - 1), 32));
//
//        System.out.println("------------------------------------------");
//
//        System.out.println(Integer.parseInt("00000000000000000000000000000001", 2));
//        System.out.println(Integer.parseInt("00000000000000000000000000000010", 2));
//        System.out.println(Integer.parseInt("00000000000000000000000000000100", 2));
//        System.out.println(Integer.parseInt("00000000000000000000000000001000", 2));
//        System.out.println(Integer.parseInt("00000000000000000000000000010000", 2));
//
//        System.out.println("------------------------------------------");
//
//        System.out.println(signingManager.element & 1);
//        System.out.println(signingManager.element & 2);
//        System.out.println(signingManager.element & 4);
//        System.out.println(signingManager.element & 8);
//        System.out.println(signingManager.element & 16);
//
//        System.out.println("------------------------------------------");
//
//        System.out.println((signingManager.element & 1) != 0);
//        System.out.println((signingManager.element & 2) != 0);
//        System.out.println((signingManager.element & 4) != 0);
//        System.out.println((signingManager.element & 8) != 0);
//        System.out.println((signingManager.element & 16) != 0);
//
//        //00000000000000000000000000011010 &
//        //00000000000000000000000000000001
//        //00000000000000000000000000000000
//
//        //00000000000000000000000000011010 &
//        //00000000000000000000000000000010
//        //00000000000000000000000000000010
//
//        //00000000000000000000000000011010 &
//        //00000000000000000000000000010000
//        //00000000000000000000000000010000
//
//        System.out.println("------------------------------------------");
//
//
//        System.out.println(intToBinary32(1 << (20 - 1), 32));
//        //00000000000000000000000000011010 |
//        //00000000000010000000000000000000
//        //00000000000010000000000000011010
//        System.out.println(Integer.parseInt("00000000000010000000000000011010", 2));
//        System.out.println(signingManager.element |= (1 << (20 - 1)));
//
//        System.out.println("------------------------------------------");
//        for (int i = 1; i <= 31; i++) {
//            System.out.println(i + "    " + signingManager.getSignStatus(i));
//        }

        //例：5天签到连续送物品
        // 31 0x1f 11111
        SigningManager signingManager = new SigningManager();
        signingManager.signToday(1);
        signingManager.signToday(2);
        signingManager.signToday(3);
        signingManager.signToday(4);
//        signingManager.signToday(5);
        signingManager.signToday(6);
        signingManager.signToday(7);
        signingManager.signToday(8);
        signingManager.signToday(9);
//        signingManager.signToday(10);
        signingManager.signToday(11);
        signingManager.signToday(12);
        signingManager.signToday(13);
        signingManager.signToday(14);
//        signingManager.signToday(15);
//        signingManager.signToday(16);
//        signingManager.signToday(17);
//        signingManager.signToday(18);
//        signingManager.signToday(19);
//        signingManager.signToday(20);
//        signingManager.signToday(21);
//        signingManager.signToday(22);
//        signingManager.signToday(23);
//        signingManager.signToday(24);
//        signingManager.signToday(25);
//        signingManager.signToday(26);
//        signingManager.signToday(27);
//        signingManager.signToday(28);
//        signingManager.signToday(29);
//        signingManager.signToday(30);
//        signingManager.signToday(31);
//        signingManager.signToday(32);

        System.out.println(signingManager.element);
        System.out.println(intToBinary32(signingManager.element, 32));

        //补签
        signingManager.signToday(10);
        System.out.println(intToBinary32(signingManager.element, 32));
        System.out.println(intToBinary32(31, 32));

        System.out.println(signingManager.continuousNumber(2));
    }
}