js获取身份证获得生日和年龄_前端身份证获取生日-优快云博客

博客给出两段JavaScript代码。一段根据生日字符串计算周岁年龄，通过对比出生年月日与当前年月日得出结果；另一段根据身份证号获取生日和性别，区分15位和18位身份证号进行处理，最终返回包含生日和性别的数组。

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--根据生日得到年龄

//1988-12-02

function jsGetAge(strBirthday) {
var returnAge;
var strBirthdayArr = strBirthday.split("-");
var birthYear = strBirthdayArr[0];
var birthMonth = strBirthdayArr[1];
var birthDay = strBirthdayArr[2];

d = new Date();
var nowYear = d.getYear();
var nowMonth = d.getMonth() + 1;
var nowDay = d.getDate();

if (nowYear == birthYear) {
  returnAge = 0;//同年则为0岁
} else {
  var ageDiff = nowYear - birthYear; //年之差
  if (ageDiff > 0) {
   if (nowMonth == birthMonth) {
    var dayDiff = nowDay - birthDay;//日之差
    if (dayDiff < 0) {
     returnAge = ageDiff - 1;
    } else {
     returnAge = ageDiff;
    }
   } else {
    var monthDiff = nowMonth - birthMonth;//月之差
    if (monthDiff < 0) {
     returnAge = ageDiff - 1;
    } else {
     returnAge = ageDiff;
    }
   }
  } else {
   returnAge = -1;//返回-1 表示出生日期输入错误晚于今天
  }
}
return returnAge;//返回周岁年龄

}

--根据身份证号得到生日和性别

// 返回生日和性别
// ['1981-01-01','1']
function getBirthdayAndSex(idcard) {
var output = new Array(2);
output[0] = "";
output[1] = "";
if (idcard.length == 15) {
var nian, yue, ri, shengri;

  nian = idcard.substr(6, 2);
  yue = idcard.substr(8, 2);
  ri = idcard.substr(10, 2);
  shengri = "19" + nian + "-" + yue + "-" + ri;
  output[0] = shengri;

  var sex = (idcard.substr(14, 1) % 2);
  output[1] = sex;
} else if (idcard.length == 18) {
  var nian, yue, ri, shengri;

  nian = idcard.substr(6, 4);
  yue = idcard.substr(10, 2);
  ri = idcard.substr(12, 2);
  shengri = nian + "-" + yue + "-" + ri;
  output[0] = shengri;

var sex = (idcard.substr(16, 1) % 2);
output[1] = sex;
}

return output;

}