$(data.resultList).each(function () {
                        var selectedFlag = ${sessionScope.userInfo.roleLeve}==this.role_leve ? "selected ='selected'" :"";
                        roles.append("<option value='" + this.role_leve + "' "+selectedFlag+"  >" + this.role_CName + "</option>");
                    })

即可破之！

其实有的时候不要钻牛角尖，换一种思路可能会换来意想不到的结果！