笔者：java随机生成中国手机号码

import java.util.Random;

public class RandomPhoneNumGenerator {
    public static void main(String[] args) {
        String phoneNum = generatePhoneNum();
        System.out.println("随机生成的手机号码：" + phoneNum);
    }

    public static String generatePhoneNum() {
        Random random = new Random();
        // 中国移动号段
        String[] cmccPrefix = {"134", "135", "136", "137", "138", "139", "150", "151", "152", "157", "158", "159", "178", "182", "183", "184", "187", "188"};
        // 中国联通号段
        String[] cuccPrefix = {"130", "131", "132", "145", "155", "156", "166", "175", "176", "185", "186"};
        // 中国电信号段
        String[] ctcPrefix = {"133", "149", "153", "173", "177", "180", "181", "189", "199"};

        String prefix = "";
        int index = random.nextInt(3);
        switch (index) {
            case 0:
                prefix = cmccPrefix[random.nextInt(cmccPrefix.length)];
                break;
            case 1:
                prefix = cuccPrefix[random.nextInt(cuccPrefix.length)];
                break;
            case 2:
                prefix = ctcPrefix[random.nextInt(ctcPrefix.length)];
                break;
        }

        StringBuilder builder = new StringBuilder();
        builder.append(prefix);
        for (int i = 0; i < 8; i++) {
            builder.append(random.nextInt(10));
        }

        return builder.toString();
    }
}

 合理利用它，真的能大大提高我们学习和工作效率，太强大了！