半成品 java 身份证校验

   public static Boolean is18Card(String idCard18) {
      //证件省份
      HashMap<String, String> aCity = new HashMap<>();
      aCity.put("11","北京");
      aCity.put("12","天津");
      aCity.put("13","河北");
      aCity.put("14","山西");
      aCity.put("15","内蒙古");
      aCity.put("21","辽宁");
      aCity.put("22","吉林");
      aCity.put("23","黑龙江");
      aCity.put("31","上海");
      aCity.put("33","浙江");
      aCity.put("34","安徽");

      aCity.put("35","福建");
      aCity.put("36","江西");
      aCity.put("37","山东");
      aCity.put("41","河南");
      aCity.put("42","湖北");
      aCity.put("43","湖南");
      aCity.put("44","广东");
      aCity.put("45","广西");
      aCity.put("46","海南");
            /*    50: "重庆",
                  51: "四川",
                  52: "贵州",
                  53: "云南",
                  54: "西藏",
                  61: "陕西",
                  62: "甘肃",
                  63: "青海",
                  64: "宁夏",
                  65: "新疆",
                  71: "台湾",
                  81: "香港",
                  82: "澳门",
                  91: "国外"*/

      //出生日期
      String year =  idCard18.substring(6,10);
      String month = idCard18.substring(10,12);
      String day = idCard18.substring(12,14);
      Date temp_date = new Date(Integer.parseInt(year), Integer.parseInt(month) - 1, Integer.parseInt(day) - 1);
//          String temp_date = new Date(year,parseFloat(month)-1,parseFloat(day));

      //最后一位校验码
      int sum = 0;
      int[] weights = new int[17];
      weights[0]=7;
      weights[1]=9;
      weights[2]=10;
      weights[3]=5;
      weights[4]=8;
      weights[5]=4;
      weights[6]=2;
      weights[7]=1;
      weights[8]=6;
      weights[9]=3;
      weights[10]=7;
      weights[11]=9;
      weights[12]=10;
      weights[13]=5;
      weights[14]=8;
      weights[15]=4;
      weights[16]=2;
      String codes = "10X98765432";
      String[] code = codes.split("");
      String[] idCard18Split = idCard18.split("");
      for (int i = 0; i < idCard18Split.length - 1; i++) {

         sum +=  Integer.parseInt(idCard18Split[i]) * weights[i];
      }
      String last = code[sum % 11]; //计算出来的最后一位证件号码

      String province = idCard18.substring(0, 2);
      //校验前2位省份
      if(aCity.get(idCard18.substring(0, 2))==null) {
         System.out.println("证件省份代码错误");
      }
      //出生日期验证  暂未完成
      else if(temp_date.getYear()!=parseFloat(year)
            ||temp_date.getMonth()!=parseFloat(month)-1
            ||temp_date.getDate()!=parseFloat(day) )
      {
         System.out.println("'证件出生日期错误");
      }
      //证件最后一位校验码验证
      else if(idCard18Split[idCard18Split.length - 1] != last) {
         System.out.println("'证件出生日期错误");
      }
      return  null;
   }