如何用jsf的img标签自动调用后台bean的方法，从而生成图表
求教
------解决方案--------------------------------------------------------
<h:graphicImage value="#{chart.pieChart3D}" height="300" id="displayChart" alt="chart" />
报错:
Caused by: javax.el.PropertyNotFoundException: /systemMgmt.xhtml @128,98 value="#{chart.pieChart3D}": Property 'pieChart3D' not found on type com.aspectgaming.lotest.action.ChartAction_$$_javassist_seam_2
at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:73)
at javax.faces.component.UIGraphic.getValue(UIGraphic.java:148)
... 55 more
------解决方案--------------------------------------------------------
使用itext里面的pdf标签
唉，自己慢慢弄了