Sending JSON List Of Object to Spring MVC controller - ajax

Question

I have an issue with sending a List Of Objects to Spring MVC controller .
The list of object is like this
[{"alias":"1",
"rue":"Rue de la Senette",
"codePostal":"78955",
"ville":"Carrières-sous-Poissy",
"rueComplement":""}]
And I send the above data with the following AJAX code:
$.ajax({
type : 'POST',
dataType : 'json',
contentType :'application/json',
url : $("#clientForm-add").attr('action'),
data : JSON.stringify(adresses.toArray()),
});
When I use this form of ajax, it worked for me and the format sended is as follow:
Request Payload :
[{"alias":"1",
"rue":"Rue de la Senette",
"codePostal":"78955",
"ville":"Carrières-sous-Poissy",
"rueComplement":""}]
Yes, even the above one is worked, when i send it like as follow:
$.ajax({
type : 'POST',
dataType : 'json',
contentType :'application/json',
url : $("#clientForm-add").attr('action'),
data : {adresseList : JSON.stringify(adresses.toArray())},
});
It doesn;t work for me. The sending data is look like
listAdresse=%5B%7B%22alias%22%3A%221%22%2C%22rue%22%3A%22Rue+de+la+Senette%22%2C%22codePostal%22%3A%2278955%22%2C%22ville%22%3A%22Carri%C3%A8res-sous-Poissy%22%2C%22rueComplement%22%3A%22%22%7D%5D
Response Headersview source
And, It gave an error: 400 bad request
Here, my controller
#RequestMapping(value = "creerlivraison/ajouterclientBD",method=RequestMethod.POST)
public String ajouterClientBD(#RequestBody Adresse[] listAdresse, Principal principal) {
for (Adresse adresse : listAdresse) {
System.out.println(adresse);
}
return "ok";
}
I want to know that "What is the difference between the two ajax request?", why the request payload is formatted when I wrap the data inside the braquets {} and specify listAddress.
Here is screen capture:

Answer 1

http://api.jquery.com/jquery.ajax/
data
Type: PlainObject or String or Array
Data to be sent to the server. It is converted to a query string, if not already a string. It's appended to the url for GET-requests. See processData option to prevent this automatic processing. Object must be Key/Value pairs. If value is an Array, jQuery serializes multiple values with same key based on the value of the traditional setting (described below).
In this instance,
JSON.stringify(adresses.toArray()) is string, just keep the JSON format.
{adresseList : JSON.stringify(adresses.toArray())} is an object, so it is converted to a query string.