根据身份证号分辨男女

 //根据身份证号分辨男女
     public static String userType(String idNumber) {
         String userType = "";
            int gender = 0;
            if(idNumber.length() == 18){
                //如果身份证号18位，取身份证号倒数第二位
                char c = idNumber.charAt(idNumber.length() - 2);
                gender = Integer.parseInt(String.valueOf(c));
            }else{
                //如果身份证号15位，取身份证号最后一位
                char c = idNumber.charAt(idNumber.length() - 1);
                gender = Integer.parseInt(String.valueOf(c));
            }
            System.out.println("gender = " + gender);
            if(gender % 2 == 1){
                userType =  "男";
            }else{
                userType =  "女";
            }
            return userType;
    }