попробуйте с этим,
использовать фоновую полосу для добавления пустых записей после конца строк
<background>
<band height="307" splitType="Stretch">
<line>
<reportElement x="0" y="145" width="555" height="1" uuid="8184649e-10af-49b8-9f36-9df1020a2371"/>
</line>
<!-- add the suitable amount of lines -->
</background>
пример для этого решения (файл jrxml)
<jasperReport xmlns=".....">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
<queryString>
<![CDATA[]]>
</queryString>
<background>
<band height="328" splitType="Stretch">
<line>
<reportElement x="0" y="169" width="555" height="1" uuid="8184649e-10af-49b8-9f36-9df1020a2371"/>
</line>
<line>
<reportElement x="0" y="199" width="555" height="1" uuid="86060b38-40cc-4963-be7d-21df01a8aaa1"/>
</line>
<line>
<reportElement x="0" y="229" width="555" height="1" uuid="a531a915-b5cf-4854-9eb6-2981768b4db3"/>
</line>
<line>
<reportElement x="0" y="259" width="555" height="1" uuid="edb3bab2-0562-4e82-bbd0-763508148054"/>
</line>
<line>
<reportElement x="0" y="289" width="555" height="1" uuid="e0826eaa-7846-495f-9096-b07733283f9b"/>
</line>
<line>
<reportElement x="0" y="319" width="555" height="1" uuid="6b199ad4-87aa-4d47-9751-46a3e277b919"/>
</line>
</band>
</background>
<title>
<band height="79" splitType="Stretch">
<staticText>
<reportElement x="0" y="0" width="555" height="30" uuid="496a564f-23a2-41eb-9e55-8faf2ba6b7dd"/>
<textElement textAlignment="Center">
<font size="20"/>
</textElement>
<text><![CDATA[Title]]></text>
</staticText>
</band>
</title>
<pageHeader>
<band height="35" splitType="Stretch">
<staticText>
<reportElement x="0" y="0" width="555" height="30" uuid="f3677b34-d2e8-45db-923f-76dc120624b6"/>
<textElement textAlignment="Center">
<font size="20"/>
</textElement>
<text><![CDATA[Page Header]]></text>
</staticText>
</band>
</pageHeader>
<columnHeader>
<band height="31" splitType="Stretch">
<staticText>
<reportElement x="0" y="0" width="555" height="30" uuid="439da16b-0dc3-4e1e-a367-dcf66405a5d3"/>
<textElement textAlignment="Center">
<font size="20"/>
</textElement>
<text><![CDATA[Table Header]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="24" splitType="Stretch">
<textField>
<reportElement x="0" y="0" width="555" height="24" uuid="96bc78b4-7796-4b6b-9ed8-d13abd506522"/>
<textElement textAlignment="Center">
<font size="18"/>
</textElement>
<textFieldExpression><![CDATA["Data in detail band"]]></textFieldExpression>
</textField>
</band>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>
предварительный просмотр вышеуказанного файла jrxml