1.必须嵌入字体 并且吧字体在application中申明

<fx:Style>@namespace mx"library://ns.adobe.com/flex/mx";@font-face{src: url("com/qijinsoft/assets/font/chart.ttf");fontFamily: myChartFont;embedAsCFF:false; }</fx:Style>

2.在module中

<fx:Style>@namespace mx"library://ns.adobe.com/flex/mx";mx|LineChart {fontFamily: myChartFont;fontSize:12;}</fx:Style><mx:LineChart id="linechart" x="0" y="54" showDataTips="true" width="100%" height="85%" ><mx:horizontalAxis><!--表示横向坐标的序列字段--><mx:CategoryAxis id="cdate" title="日期" categoryField="date" /></mx:horizontalAxis><mx:horizontalAxisRenderers><mx:AxisRenderer  axis="{cdate}" id="axisRender" labelAlign="bottom"  labelRotation="65"/></mx:horizontalAxisRenderers><mx:verticalAxis><mx:LinearAxis title="人数"  baseAtZero="true" displayName="人数"/></mx:verticalAxis><mx:series><mx:LineSeries displayName="充值人数" yField="loginnum" id="loginnum" showEffect="{wipe}" /><mx:LineSeries displayName="新增充值人数" yField="maxonline" id="maxonline"  showEffect="{wipe}"  /></mx:series></mx:LineChart><mx:Legend left="10" bottom="10" width="100%" height="25"  dataProvider="{linechart}"/>

这样就OK 了