Passing in JSON array to spring MVC Controller - json

Question

I am trying to pass a JSON array into spring MVC Controller like such:
var myList = new Array();
data._children.forEach( function (d) {
myList.push( {NAME: d.name, TYPE: d.TYPE, FDATE: d.FDATE } );
});
$.post("/ListRequest", {myList: myList});
The controller looks as such:
#RequestMapping(value="/ListRequest", method = RequestMethod.POST)
public void ListRequest(#RequestParam("myList") myList tempmyList )
{
System.out.println(tempmyList);
}
The class myList defined as such:
public class MyList {
private List<ListT> ListT;
public List<ListT> getListT() {
return ListT;
}
public void setListT(List<ListT> listT) {
ListT = listT;
}
}
ListT class:
public class ListT {
private String NAME;
private String TYPE;
private Long FDATE; ...
I keep getting this error:
HTTP Status 400 - Required myList parameter 'myList' is not present
Also tried this request:
$.ajax({
type: "post",
url: "ListRequest", //your valid url
contentType: "application/json", //this is required for spring 3 - ajax to work (at least for me)
data: JSON.stringify(myList), //json object or array of json objects
success: function(result) {
//do nothing
},
error: function(e){
alert('failure');
}
but get this error: JBWEB000120: The request sent by the client was syntactically incorrect.

Answer 1

try to add this to you ajax call it should fix the unsupported response :
headers : {
'Accept' : 'application/json',
'Content-Type' : 'application/json'
},
this is a full example of ajax call that is working for me :
$.ajax({
dataType : "json",
url : this.baseurl + "/dataList",
headers : {
'Accept' : 'application/json',
'Content-Type' : 'application/json'
},
data : JSON.stringify(params),
type : 'POST',
success : function(data) {
self.displayResults(data);
},
error : function(jqXHR,textStatus,errorThrown ){
showPopupError('Error','error : ' + textStatus, 'ok');
}
});

Answer 2

Even I was facing same problem.
My client request was right and generated proper json file.
but still i was getting same error.
I solved this error using #JsonIgnoreProperties(ignoreUnknown = true) in pojo class.
refer this link.
Spring MVC : The request sent by the client was syntactically incorrect

Answer 3

You can try
#RequestParam("myList") myList tempmyList
#Param myList tempmyList
in addition, class names must begin with a capital letter.