<form id='addForm' action='UserAdd.action' type='post'>
  <label for='uname'>用户名</label>：<input type='text' name='uname' id='uname'><br>
  <label for='mobileIpt'>手机号：</label><input type='text' name='mobileIpt' id='mobileIpt'><br>
  <label for='birthday'>生日：</label><input type='text' name='birthday'><br>
  <input type='button' value='提交' onclick='addUser()'>
</form>

function addUser(){
  var user = {
   uname:$("#uname").val(),
   mobileIpt:$("#mobileIpt").val(),
   birthday:$("#birthday").val()
  };
  $.ajax({
   url:'UserAdd.action',
   data:user,
   type:'post',
   dataType:'text',
   success:function(msg){
    if(msg=='1'){
     console.log('添加成功');
    }else{
     console.log('添加失败')
    }
   }
  })
}

$('#addForm').serializeArray();
//返回数据结构，是json数组，每个对像分别name和value为key，代表这个表单元素的name和value
[
 {"name":"uname","value":""},
 {"name":"mobileIpt","value":""}, 
 {"name":"birthday","value":""}
]

var arr = $('#addForm').serializeArray();
$.param(arr);
"uname=alice&mobileIpt=110&birthday=1983-05-12"

$.param({uanme:'vic',mobileIpt:'110',birthday:'2013-11-11'});
"uanme=vic&mobileIpt=110&birthday=2013-11-11"

$.param([{uanme:'vic'},{mobileIpt:'110'},{birthday:'2013-11-11'}]);
"undefined=&undefined=&undefined="

//在ajax()方法中，对json类型的数据进行了$.param()处理
if ( s.data && s.processData && typeof s.data !== "string" ) {
 s.data = jQuery.param( s.data, s.traditional );
}
//param方法中
if ( jQuery.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
  // Serialize the form elements
  jQuery.each( a, function() {
   add( this.name, this.value );
  });
 } else {
  // If traditional, encode the "old" way (the way 1.3.2 or older
  // did it), otherwise encode params recursively.
  for ( prefix in a ) {
   buildParams( prefix, a[ prefix ], traditional, add );
  }
 }

[
 {"name":"uname","value":"alice"},
 {"name":"mobileIpt","value":"110"}, 
 {"name":"birthday","value":"2012-11-11"}
]