随机生成身份证号码

　  //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());  
    }