import java.io.Serializable;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;public class WeChatClub {public static void main(String[] args) {int sendMoney = 10000; // 100元int size = 6; // 红包个数Person zhangsan = new Person("1", "张三");Person lisi = new Person("2", "李四");Person wangwu = new Person("3", "王五");Person zhao6 = new Person("4", "赵六");Person mrLi = new Person("5", "李总");Person missX = new Person("6", "小波");Person missLxb = new Person("7", "李晓波");Person missF = new Person("8", "冯程程");List<Integer> redPackets = zhangsan.sendMoney(sendMoney, size);lisi.receiveMoney(redPackets);wangwu.receiveMoney(redPackets);zhao6.receiveMoney(redPackets);mrLi.receiveMoney(redPackets);missX.receiveMoney(redPackets);missLxb.receiveMoney(redPackets);missF.receiveMoney(redPackets);}}class Person implements Serializable {// 唯一标识private String id;// 昵称private String nickName;// 抢到的红包金额单位: 分private int money;public Person() {}public Person(String id, String nickName) {this.id = id;this.nickName = nickName;}// getter, setterpublic String getId() {return id;}public String getNickName() {return nickName;}public int getMoney() {return money;}/*** 发红包** @param amount 红包金额, 单位为分* @param size   红包份数* @return*/public List<Integer> sendMoney(int amount, int size) {System.out.println(nickName + "发了 " + size + " 个红包金额: " + amount);List<Integer> redPackets = new ArrayList<>();BigDecimal bdAmount = new BigDecimal(amount);for (int i = 0; i < size; i++) {if (i == size - 1) {redPackets.add(bdAmount.intValue());} else {BigDecimal percent = new BigDecimal(new Random().nextInt(100)).divide(new BigDecimal(100));BigDecimal redPacket = bdAmount.multiply(percent).setScale(0, BigDecimal.ROUND_HALF_UP);redPackets.add(redPacket.intValue());bdAmount = bdAmount.subtract(redPacket);}}return redPackets;}/*** 抢红包** @param redPackets* @return*/public synchronized void receiveMoney(List<Integer> redPackets) {if (redPackets == null || redPackets.isEmpty()) {System.out.println(nickName + " 没抢到红包, 红包被抢完了");return;}int anInt = new Random().nextInt(redPackets.size());this.money = redPackets.remove(anInt);System.out.println(nickName + "抢到了红包, 金额: " + money);}
}