$.ajax(),传参要用data

$("#modal").find(".btn-primary").unbind("click").click(function(){
            var title = $("#modal").find("input[name=title]").val();
            var intro = $("#modal").find("input[name=intro]").val();
             var params = {
                        "title":title,
                        "intro":intro
                }
            $.ajax({
                method: 'put',
                url: '/teachroom/'+id,
                data: params,
                success: function(data){
                    if(data){
                        $("#modal").modal("hide");

                    }else{
                        layer.alert("操作失败，请稍后重试！");
                    }

                }

            })
        })