我有空文本字段（它包含字符串或大十进制值）放在为我的报告拉出的单行上，该行显示一个空行。
为了删除具有空行的空白行，我使用了该属性isRemoveLineWhenBlank对于该行中的报表元素。但这是行不通的。
有人可以帮我解决这个问题吗？
snap:
output snap:
jrxml :
<?xml version="1.0" encoding="UTF-8" ?>
<!-- Created with iReport - A designer for JasperReports -->
<!DOCTYPE jasperReport PUBLIC "//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd">
<jasperReport
name="WEB_PREVIEW"
columnCount="1"
printOrder="Horizontal"
orientation="Portrait"
pageWidth="595"
pageHeight="900"
columnWidth="535"
columnSpacing="0"
leftMargin="30"
rightMargin="30"
topMargin="20"
bottomMargin="20"
whenNoDataType="NoPages"
isTitleNewPage="false"
isSummaryNewPage="false">
<property name="ireport.scriptlethandling" value="0" />
<property name="ireport.encoding" value="UTF-8" />
<import value="java.util.*" />
<import value="net.sf.jasperreports.engine.*" />
<import value="net.sf.jasperreports.engine.data.*" />
<parameter name="GROSS_RENTAL_INCOME_SQPA_LABEL" isForPrompting="false" class="java.lang.String"/>
<parameter name="GROSS_RENTAL_INCOME_SQPA" isForPrompting="false" class="java.math.BigDecimal"/>
<defaultValueExpression ><![CDATA["C:\\Development_New\\Cyprus\\Cyprus\\WebRoot\\report\\"]]></defaultValueExpression>
</parameter>
<background>
<band height="0" isSplitAllowed="true" >
</band>
</background>
<title>
<band height="0" isSplitAllowed="true" >
</band>
</title>
<pageHeader>
<band height="32" isSplitAllowed="true" >
<textField isStretchWithOverflow="true" isBlankWhenNull="true" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self" >
<reportElement
x="367"
y="105"
width="96"
height="12"
key="textField"
positionType="Float"
isRemoveLineWhenBlank="true">
<printWhenExpression><![CDATA[new Boolean($P{GROSS_RENTAL_INCOME_SQPA}!=null)]]></printWhenExpression>
</reportElement>
<box></box>
<textElement>
<font pdfFontName="Helvetica-Bold" size="8" isBold="true"/>
</textElement>
<textFieldExpression class="java.lang.String"><![CDATA[$P{GROSS_RENTAL_INCOME_SQPA_LABEL}]]></textFieldExpression>
</textField>
<textField isStretchWithOverflow="true" pattern="###,##0.00" isBlankWhenNull="true" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self" >
<reportElement
x="472"
y="105"
width="48"
height="12"
key="textField"
positionType="Float"
isRemoveLineWhenBlank="true">
<printWhenExpression><![CDATA[new Boolean($P{GROSS_RENTAL_INCOME_SQPA}!=null)]]></printWhenExpression>
</reportElement>
<box></box>
<textElement>
<font size="8"/>
</textElement>
<textFieldExpression class="java.math.BigDecimal"><![CDATA[$P{GROSS_RENTAL_INCOME_SQPA}]]></textFieldExpression>
</textField>
</band>
</detail>
<columnFooter>
<band height="0" isSplitAllowed="true" >
</band>
</columnFooter>
<pageFooter>
<band height="0" isSplitAllowed="true" >
</band>
</pageFooter>
<summary>
<band height="0" isSplitAllowed="true" >
</band>
</summary>
</jasperReport>
您可以播放下面的示例以获得您想要的结果。
它演示了如何隐藏两个行文本域元素（两列）的帮助frame元素（当然与使用合作空白时删除行问题中所述的财产）。
The jrxml文件代码：
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport ... pageWidth="595" pageHeight="842" whenNoDataType="AllSectionsNoDetail" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="0" bottomMargin="0">
<parameter name="par1" class="java.lang.String">
<defaultValueExpression><![CDATA[null]]></defaultValueExpression>
</parameter>
<parameter name="par2" class="java.lang.String">
<defaultValueExpression><![CDATA[null]]></defaultValueExpression>
</parameter>
<parameter name="par3" class="java.lang.String">
<defaultValueExpression><![CDATA[null]]></defaultValueExpression>
</parameter>
<parameter name="par4" class="java.lang.String">
<defaultValueExpression><![CDATA[null]]></defaultValueExpression>
</parameter>
<title>
<band height="139" splitType="Stretch">
<line>
<reportElement x="10" y="61" width="520" height="1"/>
</line>
<line>
<reportElement x="10" y="127" width="520" height="1"/>
</line>
<textField isBlankWhenNull="true">
<reportElement x="10" y="85" width="52" height="20" isRemoveLineWhenBlank="true"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$P{par3} == null ? null : "P3: " + $P{par3}]]></textFieldExpression>
</textField>
<textField isBlankWhenNull="true">
<reportElement x="10" y="65" width="52" height="20" isRemoveLineWhenBlank="true"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$P{par1} == null ? null : "P1: " + $P{par1}]]></textFieldExpression>
</textField>
<textField isBlankWhenNull="true">
<reportElement x="62" y="65" width="52" height="20" isRemoveLineWhenBlank="true"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$P{par2} == null ? null : "P2: " + $P{par2}]]></textFieldExpression>
</textField>
<textField isBlankWhenNull="true">
<reportElement x="62" y="85" width="52" height="20" isRemoveLineWhenBlank="true"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$P{par4} == null ? null : "P4: " + $P{par4}]]></textFieldExpression>
</textField>
<frame>
<reportElement x="331" y="65" width="52" height="54"/>
<textField isBlankWhenNull="true">
<reportElement x="0" y="20" width="52" height="20" isRemoveLineWhenBlank="true"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$P{par3} == null ? null : "P3: " + $P{par3}]]></textFieldExpression>
</textField>
<textField isBlankWhenNull="true">
<reportElement x="0" y="0" width="52" height="20" isRemoveLineWhenBlank="true"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$P{par1} == null ? null : "P1: " + $P{par1}]]></textFieldExpression>
</textField>
</frame>
<frame>
<reportElement x="383" y="65" width="52" height="54"/>
<textField isBlankWhenNull="true">
<reportElement x="0" y="0" width="52" height="20" isRemoveLineWhenBlank="true"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$P{par2} == null ? null : "P2: " + $P{par2}]]></textFieldExpression>
</textField>
<textField isBlankWhenNull="true">
<reportElement x="0" y="20" width="52" height="20" isRemoveLineWhenBlank="true"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$P{par4} == null ? null : "P4: " + $P{par4}]]></textFieldExpression>
</textField>
</frame>
<textField isStretchWithOverflow="true">
<reportElement x="16" y="0" width="115" height="51"/>
<box topPadding="10" leftPadding="10" bottomPadding="10" rightPadding="10"/>
<textElement>
<font isBold="true" isItalic="true"/>
</textElement>
<textFieldExpression><![CDATA["P1: " + $P{par1} + "\nP2: " + $P{par2} + "\nP3: " + $P{par3} + "\nP4: " + $P{par4}]]></textFieldExpression>
</textField>
</band>
</title>
</jasperReport>
The report's design in iReport:
The result for hiding the whole line:
The result for hiding the only one field in first column, first row:
