// Controller code:
    @RequestMapping(value="/contact/sendmessage", method = RequestMethod.POST)
    public String recieveMessage(@RequestParam("message") Map<String, String> message){
//        ModelAndView model = new ModelAndView();
        String model = "Your sent your";
        System.out.println(message);
        return model;
    }

// JS code:
$(function(){
    $("#contactMessage").on('Submit', function(e){
        alert("You clicked the button");
        var form = $("#contactMessage");
        e.preventDefault();

        $.ajax({
            "type": "POST",
            "url": "/LillaKammaren/contact/sendmessage",
            "data": form.serialize(),
            "success": function(data){
                $("#msgSendingSuccess").append(data + "sent!");
            }
        });
    });
});

//Html

<form id="contactMessage" accept-charset="UTF-8" method="POST">
                                    <span class="pform" th:text="#{form.name}">Name: </span><span class="required">*</span><br/>
                                    <input type="text" name="name" required="required" /><br/>
                                    <span class="pform" th:text="#{form.email}">Email: </span><span class="required">*</span><br/>
                                    <input type="email" name="email" required="required" /><br/>
                                    <span class="pform" th:text="#{form.orderno}">Order number:</span><br/>
                                    <input type="text" name="orderno" /><br/>
                                    <span class="pform" th:text="#{form.message}">Message: </span><span class="required">*</span><br/>
                                    <textarea name="message" class="textarea" cols="40" rows="4" required="required" /><br/>
                                    <span class="required" th:text="#{form.required}">* Fields are required</span><br />
                                    <input type="submit" value="Skicka" />
                                </form>
                                <p class="msgSendingSuccess"></p>