got 400 error after jQuery send json request to spring mvc server

Question

My spring3.1 mvc server can response right json result by add @ResponseBody, should no problem on spring setting file. The servlet.xml included

<mvc:annotation-driven/>

I put jackson jars in classpath.

And my html file also set contentType to 'application/json" in .ajaxSetup() method. And I can see post header is right in Firebug.

I also tried include json2.js to call JSON.stringify method.

The json format sample:

{"link":"http:xxxxx","ticker":"xxxxx"}

The responseBody class is Document:

public class Document implements Serializable{
   public String getLink(){...}
   public String setLink(String link){...}
   public String getTicker(){...}
   public String setTicker(String ticker){...}
}

The controller code:

public class LoadFile  {                                                                                                                                                                                                                                                                                                                                                                         

    @RequestMapping(value="/loadFile",method=RequestMethod.POST)                                                                                                                                                  
    public @ResponseBody Document loadFile(@RequestBody Document document){ 
        ...
    }
}

The html code:

$(function() {                                                                                                                                                                                                   
    $.ajaxSetup({                                                                                                                                                                                               
        contentType:"application/json;charset=utf-8" 
    });                                                                                                                                                       
    $.post( url, { link: link, ticker:ticker },                                                                                                                                            
        function( data ) {  
           ....
        },"json"
    );
}

Document class can return as a json object when added @ResponseBody, but when as a @RequestBody, the server returns 400 error. Not sure what happens.

fixed by reference [link] http://stackoverflow.com/questions/5908466/jquery-spring-mvc-requestbody-and-json-making-it-work-together/5908847#5908847 I guess gae jackson lib have some conflict with spring, so have to explicit the converter package name. But still use RequestBody, not ModelAttribute — atu0830, Oct 17 '12 at 17:03

Dean Marsden · Answer 1 · 2015-10-29T13:38:31.160

0

I've had a similar problem recently. For me, it was adding the "" around the variable names which gave me the 400 error. Try it like this:

{link:"http:xxxxx",ticker:"xxxxx"}

Also make sure that your variables correspond to your database, depending how Spring3.1 handles the data. (e.g in the correct order)

I hope that helps you.

edited Oct 29 '15 at 13:38

answered Oct 16 '12 at 17:45

Dean Marsden

207
1
9

sorry, my json sample is from firebug. but code is {link:"http:xxxxx",ticker:"xxxxx"}, so should not be the cause – atu0830 Oct 16 '12 at 18:32

score 0 · Answer 2 · answered Oct 16 '12 at 19:01

0

replace @RequestBody by @ModelAttribute

answered Oct 16 '12 at 19:01

storm_buster

7,362
18
53
75

the method called but document's property is null. Base spring document, it can create document from form or session. How can create document from jquery post? – atu0830 Oct 16 '12 at 20:31
it should work, make sure that link and ticker have a value. you can look at them on firebug – storm_buster Oct 16 '12 at 21:23
firebug show the two parameter have right value but server side's document still do not have any property. – atu0830 Oct 16 '12 at 23:49

got 400 error after jQuery send json request to spring mvc server

2 Answers2