//程序入口
　　　public static void main ( String[] args )　　 {          Test t = new Test();        for (int i = 0; i < 100; i++)//随机生成100个身份证号码        {            System.out.println(t.getRandomID();
　　　　 }
　　 }

/**      * 获取随机生成的身份证号码      *       * @author mingzijian      * @return      */      public String getRandomID() {          String id = "420222199204179999";          // 随机生成省、自治区、直辖市代码 1-2          String provinces[] = { "11", "12", "13", "14", "15", "21", "22", "23",                  "31", "32", "33", "34", "35", "36", "37", "41", "42", "43",                  "44", "45", "46", "50", "51", "52", "53", "54", "61", "62",                  "63", "64", "65", "71", "81", "82" };          String province = randomOne(provinces);          // 随机生成地级市、盟、自治州代码 3-4          String city = randomCityCode(18);          // 随机生成县、县级市、区代码 5-6          String county = randomCityCode(28);          // 随机生成出生年月 7-14          String birth = randomBirth(20, 40);          // 随机生成顺序号 15-17(随机性)          Random rd=new Random();        String no = rd.nextInt(10)+""+rd.nextInt(10)+""+rd.nextInt(10);         // 随机生成校验码 18          String checks[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9","X" };          String check = randomOne(checks);          // 拼接身份证号码          id = province + city + county + birth + no + check;          return id;      }        /**      * 从String[] 数组中随机取出其中一个String字符串      *  new Random().nextInt(10)————>>区间是：[0,10),包含0但不包含10     * @author mingzijian      * @param s      * @return      */      public String randomOne(String s[]) {          return s[new Random().nextInt(s.length)];      }        /**      * 随机生成两位数的字符串（01-max）,不足两位的前面补0      *       * @author mingzijian      * @param max      * @return      */      public String randomCityCode(int max) {          int i = new Random().nextInt(max) + 1;          return i > 9 ? i + "" : "0" + i;      }        /**      * 随机生成minAge到maxAge年龄段的人的生日日期      *       * @author mingzijian      * @param minAge      * @param maxAge      * @return      */      public String randomBirth(int minAge, int maxAge) {          SimpleDateFormat dft = new SimpleDateFormat("yyyyMMdd");// 设置日期格式          Calendar date = Calendar.getInstance();          date.setTime(new Date());// 设置当前日期          // 随机设置日期为前maxAge年至前minAge年的任意一天          int randomDay = 365 * minAge  + new Random().nextInt(365 * (maxAge - minAge));          date.set(Calendar.DATE, date.get(Calendar.DATE) - randomDay);          return dft.format(date.getTime());      }