身份证简单校验

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身份证前六位为区号, 中间八位为出生日期, 再后三位为顺序码, 偶数分配给女性, 奇数给男性, 最后一位为校验位, 值为身份证前十七位 加权求和 然后对11取模 进行映射

权值为 [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2]

映射为 ["1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"]

示例代码(JS)

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function verify(idCardNumber) {
  const REG = /\d{17}[\dX]/;
  const W = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
  const V = ["1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"];
  const C0 = "0".charCodeAt(0);

  if (!REG.test(idCardNumber)) {
    return false;
  }

  let sum = 0;
  for (let i = 0; i < idCardNumber.length - 1; i++) {
    sum += ((idCardNumber.charCodeAt(i) - C0) * W[i]);
  }

  let v = V[sum % 11];
  return idCardNumber.charAt(idCardNumber.length - 1) == v;
}