Jquery 将表单序列化为Json对象

大家知道Jquery中有serialize方法，可以将表单序列化为一个“&”连接的字符串，但却没有提供序列化为Json的方法。不过，我们可以写一个插件实现。

 

我在网上看到有人用替换的方法，先用serialize序列化后，将&替换成“：”、“‘”：

/**
* 重置form表单
* @param formId form的id
*/
function


 resetQuery(formId){
var


 fid = 
"#"

 + formId;
var


 str = $(fid).serialize();
//str= cardSelectDate=3&startdate=2012-02-01&enddate=2012-02-04
var


 ob= strToObj(str);
alert(ob.startdate);
//2012-02-01
}
function


 strToObj(str){
str = str.replace(/&/g,
"','"

);
str = str.replace(/=/g,
"':'"

);
str = 
"({'"

+str +
"'})"

;
obj = eval(str);
return


 obj;
}

/** 
     * 重置form表单 
     * @param formId  form的id  
     */  
    function resetQuery(formId){  
        var fid = "#" + formId;  
        var str = $(fid).serialize();  
        //str= cardSelectDate=3&startdate=2012-02-01&enddate=2012-02-04  
        var ob= strToObj(str);  
        alert(ob.startdate);//2012-02-01  
    }  
      
    function strToObj(str){  
        str = str.replace(/&/g,"','");  
        str = str.replace(/=/g,"':'");  
        str = "({'"+str +"'})";  
        obj = eval(str);   
        return obj;  
    }  

个人感觉这样做有bug。

 

我的方法是，先用serializeArray序列化为数组，再封装为Json对象。

 

 

下面是表单：

 

<
form


 
id

=
"myForm"

 
action

=
"#"

>
<
input


 
name

=
"name"

/>
<
input


 
name

=
"age"

/>
<
input


 
type

=
"submit"

/>
</
form
>

<form id="myForm" action="#">
	<input name="name"/>
	<input name="age"/>
	<input type="submit"/>
</form>

 

Jquery插件代码如下：

 

(
function


($){
$.fn.serializeJson=
function


(){
var


 serializeObj={};
$(
this


.serializeArray()).each(
function


(){
serializeObj[
this


.name]=
this


.value;
});
return


 serializeObj;
};
})(jQuery);

(function($){
		$.fn.serializeJson=function(){
			var serializeObj={};
			$(this.serializeArray()).each(function(){
				serializeObj[this.name]=this.value;
			});
			return serializeObj;
		};
	})(jQuery);

 

 

下面测试一下：$("#myForm").bind("submit",function(e){

e.preventDefault();
console.log($(
this


).serializeJson());
});

		e.preventDefault();
		console.log($(this).serializeJson());
	});

测试结果：

输入a，b提交，得到序列化结果

{age: "b",name: "a"}

 

 

上面的插件，不能适用于有多个值的输入控件，例如复选框、多选的select。下面，我将插件做进一步的修改，让其支持多选。代码如下：

 

(
function


($){
$.fn.serializeJson=
function


(){
var


 serializeObj={};
var


 array=
this


.serializeArray();
var


 str=
this


.serialize();
$(array).each(
function


(){
if


(serializeObj[
this


.name]){
if


($.isArray(serializeObj[
this


.name])){
serializeObj[
this


.name].push(
this


.value);
}
else


{
serializeObj[
this


.name]=[serializeObj[
this


.name],
this


.value];
}
}
else


{
serializeObj[
this


.name]=
this


.value;
}
});
return


 serializeObj;
};
})(jQuery);

(function($){
		$.fn.serializeJson=function(){
			var serializeObj={};
			var array=this.serializeArray();
			var str=this.serialize();
			$(array).each(function(){
				if(serializeObj[this.name]){
					if($.isArray(serializeObj[this.name])){
						serializeObj[this.name].push(this.value);
					}else{
						serializeObj[this.name]=[serializeObj[this.name],this.value];
					}
				}else{
					serializeObj[this.name]=this.value;	
				}
			});
			return serializeObj;
		};
	})(jQuery);

这里，我将多选的值封装为一个数值来进行处理。如果大家使用的时候需要将多选的值封装为“,"连接的字符串或者其他形式，请自行修改相应代码。

 

测试如下：

表单：

 

<
form


 
id

=
"myForm"

 
action

=
"#"

>
<
input


 
name

=
"name"

/>
<
input


 
name

=
"age"

/>
<
select


 
multiple

=
"multiple"

 
name

=
"interest"

 
size

=
"2"

>
<
option


 
value

 =
"interest1"

>


interest1
</
option
>
<
option


 
value

 =
"interest2"

>


interest2
</
option
>
<
option


 
value

=
"interest3"

>


interest3
</
option
>
<
option


 
value

=
"interest4"

>


interest4
</
option
>
</
select
>
<
input


 
type

=
"checkbox"

 
name

=
"vehicle"

 
value

=
"Bike"

 
/>


 I have a bike
<
input


 
type

=
"checkbox"

 
name

=
"vehicle"

 
value

=
"Car"

 
/>


 I have a car
<
input


 
type

=
"submit"

/>
</
form
>

<form id="myForm" action="#">
	<input name="name"/>
	<input name="age"/>
	<select multiple="multiple" name="interest" size="2">
		<option value ="interest1">interest1</option>
		<option value ="interest2">interest2</option>
		<option value="interest3">interest3</option>
		<option value="interest4">interest4</option>
	</select>
	<input type="checkbox" name="vehicle" value="Bike" /> I have a bike
	<input type="checkbox" name="vehicle" value="Car" /> I have a car
	<input type="submit"/>
</form>

测试结果：

{age: "aa",interest: ["interest2", "interest4"],name: "dd",vehicle:["Bike","Car"]}