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！