Java JasperReport中的条件列表循环

如果列表的大小大于2，则该列表将有另一个附件（另一个模板）文件

<![CDATA[$P{policyInsuredPersonBeneficiariesList}.size() < 3]]>

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顺便说一句：我使用JasperReport 5.1

是否有可能在调用导出程序后修改列表（存储在$p{PolicyInsuredPersonBeniciariesList}）？@Alex K，我没有修改，我只是将列表作为参数传递。请在单独的变量中分隔列表大小信息（如果可能）。因此，在IF子句中，使用变量很容易在比较之前检查值。计算填充列表时的生命周期与调用表达式的子报表/带区。

<parameter name="policyInsuredPersonBeneficiariesList" class="java.util.List"/>
.....
<componentElement>
    <reportElement uuid="e7c57647-5643-443f-bc07-c0e4ff6c5392" x="124" y="412" width="140" height="18" isPrintWhenDetailOverflows="true">
        <printWhenExpression><![CDATA[$P{policyInsuredPersonBeneficiariesList}.size() > 2]]></printWhenExpression>
    </reportElement>
    <jr:list xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd" printOrder="Vertical" ignoreWidth="false">
        <datasetRun subDataset="dsInsuredPersonBeneficiaries" uuid="03295256-f4a3-4bd9-85bf-7a01896a544b">
            <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{policyInsuredPersonBeneficiariesList})]]></dataSourceExpression>
        </datasetRun>
        <jr:listContents height="18" width="140">
            <textField isStretchWithOverflow="true">
                <reportElement uuid="8a76ba89-7f02-4755-86d0-c9789925bf2a" stretchType="RelativeToBandHeight" x="0" y="1" width="140" height="15"/>
                <textElement>
                    <font fontName="Zawgyi-One" size="10"/>
                </textElement>
                <textFieldExpression><![CDATA[$F{fullName}+" - "+$F{percentage}+"% - "+((org.ace.insurance.system.common.relationship.RelationShip)$F{relationship}).getName()]]></textFieldExpression>
            </textField>
        </jr:listContents>
    </jr:list>
</componentElement>

1) generateLifePolicyIssueSingle(org.ace.insurance.report.test.ReportTest)
java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
    at java.util.ArrayList.RangeCheck(Unknown Source)
    at java.util.ArrayList.remove(Unknown Source)
    at java.util.Collections$SynchronizedList.remove(Unknown Source)
    at net.sf.jasperreports.engine.JasperPrint.removePage(JasperPrint.java:535)