Jquery：Ajax提交form表单以json格式

 $("#id").click(function() {
        var formObject = {};
        var formArray =$("#userInfo").serializeArray();
        $.each(formArray,function(i,item){
            formObject[item.name] = item.value;
        });
        $.ajax({
            url:"user/addUser",
            type:"post",
            contentType: "application/json; charset=utf-8",
            data: JSON.stringify(formObject),
            dataType: "json",
            success:function(data){
                alert(data.msg);
            },
            error:function(e){
                alert("错误！！");
            }
        });
    });