Java工具类实现校验公民身份证的有效性

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packagecom.api.util;
 
importjava.util.Calendar;
importjava.util.GregorianCalendar;
importjava.util.HashMap;
importjava.util.Map;
 
/**
 * 身份证验证的工具(支持5位或18位省份证)
 * 身份证号码结构:
 * 17位数字和1位校验码:6位地址码数字,8位生日数字,3位出生时间顺序号,1位校验码。
 * 地址码(前6位):表示对象常住户口所在县(市、镇、区)的行政区划代码,按GB/T2260的规定执行。
 * 出生日期码,(第七位 至十四位):表示编码对象出生年、月、日,按GB按GB/T7408的规定执行,年、月、日代码之间不用分隔符。
 * 顺序码(第十五位至十七位):表示在同一地址码所标示的区域范围内,对同年、同月、同日出生的人编订的顺序号,
 * 顺序码的奇数分配给男性,偶数分配给女性。
 * 校验码(第十八位数):
 * 十七位数字本体码加权求和公式 s = sum(Ai*Wi), i = 0,,16,先对前17位数字的权求和;  
 *  Ai:表示第i位置上的身份证号码数字值.Wi:表示第i位置上的加权因.Wi: 7 9 10 5 8 4 2 1 6 3 7 9 10 5 8 4 2;
 * 计算模 Y = mod(S, 11)
 * 通过模得到对应的校验码 Y: 0 1 2 3 4 5 6 7 8 9 10 校验码: 1 0 X 9 8 7 6 5 4 3 2
 */
publicclass IDCardUtil {
    finalstatic Map<Integer, String> zoneNum = newHashMap<Integer, String>();
    static{
        zoneNum.put(11,"北京");
        zoneNum.put(12,"天津");
        zoneNum.put(13,"河北");
        zoneNum.put(14,"山西");
        zoneNum.put(15,"内蒙古");
        zoneNum.put(21,"辽宁");
        zoneNum.put(22,"吉林");
        zoneNum.put(23,"黑龙江");
        zoneNum.put(31,"上海");
        zoneNum.put(32,"江苏");
        zoneNum.put(33,"浙江");
        zoneNum.put(34,"安徽");
        zoneNum.put(35,"福建");
        zoneNum.put(36,"江西");
        zoneNum.put(37,"山东");
        zoneNum.put(41,"河南");
        zoneNum.put(42,"湖北");
        zoneNum.put(43,"湖南");
        zoneNum.put(44,"广东");
        zoneNum.put(45,"广西");
        zoneNum.put(46,"海南");
        zoneNum.put(50,"重庆");
        zoneNum.put(51,"四川");
        zoneNum.put(52,"贵州");
        zoneNum.put(53,"云南");
        zoneNum.put(54,"西藏");
        zoneNum.put(61,"陕西");
        zoneNum.put(62,"甘肃");
        zoneNum.put(63,"青海");
        zoneNum.put(64,"新疆");
        zoneNum.put(71,"台湾");
        zoneNum.put(81,"香港");
        zoneNum.put(82,"澳门");
        zoneNum.put(91,"外国");
    }
     
    finalstatic int[] PARITYBIT = {'1','0','X','9','8','7','6','5','4','3','2'};
    finalstatic int[] POWER_LIST = { 7,9,10,5,8,4,2,1,6,3,7,9,10,
        5,8,4,2};
     
    /**
     * 身份证验证
     *@param s  号码内容
     *@return 是否有效 null和"" 都是false
     */
    publicstatic boolean isIDCard(String certNo){
        if(certNo == null|| (certNo.length() != 15&& certNo.length() != 18))
            returnfalse;
        finalchar[] cs = certNo.toUpperCase().toCharArray();
        //校验位数
        intpower = 0;
        for(inti=0; i<cs.length; i++){
            if(i==cs.length-1&& cs[i] == 'X')
                break;//最后一位可以 是X或x
            if(cs[i]<'0'|| cs[i]>'9')
                returnfalse;
            if(i < cs.length -1){
                power += (cs[i] - '0') * POWER_LIST[i];
            }
        }
         
        //校验区位码
        if(!zoneNum.containsKey(Integer.valueOf(certNo.substring(0,2)))){
            returnfalse;
        }
         
        //校验年份
        String year = certNo.length() == 15? getIdcardCalendar() + certNo.substring(6,8) :certNo.substring(6,10);
         
        finalint iyear = Integer.parseInt(year);
        if(iyear < 1900|| iyear > Calendar.getInstance().get(Calendar.YEAR))
            returnfalse;//1900年的PASS,超过今年的PASS
         
        //校验月份
        String month = certNo.length() == 15? certNo.substring(8,10) : certNo.substring(10,12);
        finalint imonth = Integer.parseInt(month);
        if(imonth <1|| imonth >12){
            returnfalse;
        }
         
        //校验天数     
        String day = certNo.length() ==15? certNo.substring(10,12) : certNo.substring(12,14);
        finalint iday = Integer.parseInt(day);
        if(iday < 1|| iday > 31)
            returnfalse;      
         
        //校验"校验码"
        if(certNo.length() == 15)
            returntrue;
        returncs[cs.length -1] == PARITYBIT[power % 11];
    }
     
    privatestatic int getIdcardCalendar() {       
         GregorianCalendar curDay = newGregorianCalendar();
         intcurYear = curDay.get(Calendar.YEAR);
         intyear2bit = Integer.parseInt(String.valueOf(curYear).substring(2));         
         return year2bit;
    }    
     
     
     
    publicstatic void main(String[] args) {   
         booleanmark = isIDCard("450981198802261753");   
         System.out.println(mark);
    }
 
}
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