<form enctype='application/json'>
 <input name='name' value='Bender'>
 <select name='hind'>
  <option selected>Bitable</option>
  <option>Kickable</option>
 </select>
 <input type='checkbox' name='shiny' checked>
</form>

// 生成的Json数据是
{
 "name":  "Bender"
, "hind":  "Bitable"
, "shiny": true
}

<form enctype='application/json'>
 <input type='number' name='bottle-on-wall' value='1'>
 <input type='number' name='bottle-on-wall' value='2'>
 <input type='number' name='bottle-on-wall' value='3'>
</form>

// 生成的Json数据是
{
 "bottle-on-wall":  [1, 2, 3]
}

<form enctype='application/json'>
 <input name='pet[species]' value='Dahut'>
 <input name='pet[name]' value='Hypatia'>
 <input name='kids[1]' value='Thelma'>
 <input name='kids[0]' value='Ashley'>
</form>

// 生成的Json数据是
{
  "pet": {
    "species": "Dahut"
  ,  "name":   "Hypatia"
  }
,  "kids":  ["Ashley", "Thelma"]
}

<form enctype='application/json'>
 <input name='hearbeat[0]' value='thunk'>
 <input name='hearbeat[2]' value='thunk'>
</form>

// 生成的Json数据是
{
  "hearbeat":  ["thunk", null, "thunk"]
}

<form enctype='application/json'>
 <input name='pet[0][species]' value='Dahut'>
 <input name='pet[0][name]' value='Hypatia'>
 <input name='pet[1][species]' value='Felis Stultus'>
 <input name='pet[1][name]' value='Billie'>
</form>

// 生成的Json数据是
{
 "pet": [
  {
   "species": "Dahut"
  , "name":  "Hypatia"
  }
 , {
   "species": "Felis Stultus"
  , "name":  "Billie"
  }
 ]
}

<form enctype='application/json'>
 <input name='wow[such][deep][3][much][power][!]' value='Amaze'>
</form>

// 生成的Json数据是
{
 "wow": {
  "such": {
   "deep": [
    null
   , null
   , null
   , {
     "much": {
      "power": {
       "!": "Amaze"
      }
     }
    }
   ]
  }
 }
}

<form enctype='application/json'>
 <input type='file' name='file' multiple>
</form>

// 假设你上传了2个文件, 生成的Json数据是:
{
 "file": [
  {
   "type": "text/plain",
   "name": "dahut.txt",
   "body": "REFBQUFBQUFIVVVVVVVVVVVVVCEhIQo="
  },
  {
   "type": "text/plain",
   "name": "litany.txt",
   "body": "SSBtdXN0IG5vdCBmZWFyLlxuRmVhciBpcyB0aGUgbWluZC1raWxsZXIuCg=="
  }
 ]
}