如何为主键创建特定样式的随机键

import java.util.Random;

public class RandomKeyGenerator {
    private static final String CHARACTERS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    private static final int KEY_LENGTH = 8;

    public static String generateRandomKey() {
        StringBuilder sb = new StringBuilder(KEY_LENGTH);
        Random random = new Random();

        for (int i = 0; i < KEY_LENGTH; i++) {
            int index = random.nextInt(CHARACTERS.length());
            sb.append(CHARACTERS.charAt(index));
        }

        return sb.toString();
    }

    public static void main(String[] args) {
        String randomKey = generateRandomKey();
        System.out.println("Random Key: " + randomKey);
    }
}