用java编写一个程序，实现剪刀石头布小游戏：编写一个剪刀石头布游戏的程序。程序启动后会随机生成0~2的随机数，分别代表剪刀、石头和布，玩家通过键盘输入剪刀、石头和布与电脑进行3轮的游戏，赢的次数多的一方为赢家。若三局皆为平局，则最终结果判为平局。

import java.util.Scanner;
import java.util.Random;

public class RockPaperScissors {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Random random = new Random();
        int playerScore = 0;
        int computerScore = 0;
        int rounds = 3;

        for (int i = 0; i < rounds; i++) {
            System.out.println("请输入剪刀、石头或布：");
            String playerChoice = scanner.nextLine().trim();
            int computerChoice = random.nextInt(3); // 生成0~2的随机数

            if (playerChoice.equals("剪刀")) {
                playerChoice = "0";
            } else if (playerChoice.equals("石头")) {
                playerChoice = "1";
            } else if (playerChoice.equals("布")) {
                playerChoice = "2";
            } else {
                System.out.println("无效输入，请重新输入剪刀、石头或布。");
                i--; // 重新进行这一轮
                continue;
            }

            System.out.println("电脑选择了：" + getChoiceName(computerChoice));

            if (playerChoice.equals(String.valueOf(computerChoice))) {
                System.out.println("平局！");
            } else if ((playerChoice.equals("0") && computerChoice == 2) ||
                       (playerChoice.equals("1") && computerChoice == 0) ||
                       (playerChoice.equals("2") && computerChoice == 1)) {
                System.out.println("你赢了这一轮！");
                playerScore++;
            } else {
                System.out.println("电脑赢了这一轮！");
                computerScore++;
            }
        }

        if (playerScore > computerScore) {
            System.out.println("恭喜你赢得了游戏！");
        } else if (playerScore < computerScore) {
            System.out.println("很遗憾，电脑赢得了游戏。");
        } else {
            System.out.println("游戏结束，双方平局！");
        }
    }

    private static String getChoiceName(int choice) {
        switch (choice) {
            case 0: return "剪刀";
            case 1: return "石头";
            case 2: return "布";
            default: return "";
        }
    }
}