急！！！！！急！！！！struts+jasperreport报表问题，哪个大神会啊？？？？？

struts+jasperreport做报表，显示数据为空或0，条数正确，不知道是代码问题还是ireport设置问题！
action代码：
public String taxDeclaration() {
rptApd3s = taxDeclareManager.getRptApd3(rptRcdID);
return "success_rptApd3";
}
strutus.xml代码：
<action name="taxDeclaration" class="com.lesaas.record.web.TaxDeclareAction" method="taxDeclaration">
<result name="success_rptApd3" type="jasper">
<param name="location">/jasperreport/rptApd3.jasper</param>
<param name="dataSource">rptApd3s</param>
<param name="format">PDF</param>
</result>
</action>
求大神解答