下拉框读取数据库某字段数据

没经验折腾坏了..

$(document).ready(function(){
                $.ajax({
                    type:"post",
                    url:'/TM/userController/getProjects.do', 
                    dataType:"json",
                    success:function(json){
                        console.log(json.rows.length);
                        var str ="<select>"+"<option value=''>"+"请选择"+"</option>";
                            //str += "<option value='""'>"+"请选择"+"</option>";
                        for(i = 0;i < json.rows.length;i++){
                            str +="<option>"+json.rows[i].themeName+"</option>";
                        }
                        str +="</select>"
                        $("#project").html(str);
                    },
                    error:function(){
                        alert("error!");
                    }
                });
            });