Menyimpan data menggunakan json localstorage dan menampilkannya

Saya ingin membuat form yang isinya radio button, nah nanti jika di klik radio buttonnya akan kesimpan ke localstorage, dan jika saya reload atau refresh pagenya tetap ke pilih radio buttonnya atau ke checked yg tadi saya klik, itu gmna ya??

<form action="">
  <ul>
    <li><input type="radio" name="radio1" value="r1" id="r1">r1</li>
    <li><input type="radio" name="radio1" value="r2" id="r2">r2</li>
    <li><input type="radio" name="radio1" value="r3" id="r3">r3</li>
  </ul>
  <ul>
    <li><input type="radio" name="radio2" value="rr1" id="rr1">rr1</li>
    <li><input type="radio" name="radio2" value="rr2" id="rr2">rr2</li>
    <li><input type="radio" name="radio2" value="rr3" id="rr3">rr3</li>
  </ul>
  <ul>
    <li><input type="radio" name="radio3" value="rrr1" id="rrr1">rrr1</li>
    <li><input type="radio" name="radio3" value="rrr2" id="rrr2">rrr2</li>
    <li><input type="radio" name="radio3" value="rrr3" id="rrr3">rrr3</li>
  </ul>
    </form>