java - iReport：如何在没有数据行的情况下隐藏带有文本字段的行包含不同类型的数据

Question

我有空文本字段（它包含字符串或 bigdecimal 值）放在为我的报告拉出的单行上，显示一个空行。

为了删除具有空行的空白行，我使用了该行isRemoveLineWhenBlank中报告元素的属性。但这不起作用。

有人可以帮我吗？

折断：在此处输入图像描述

输出快照：在此处输入图像描述

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>

score 1 · Accepted Answer

您可以播放下面的示例以获得您想要的结果。

它演示了如何在框架元素的帮助下隐藏带有两个textField元素（两列）的行（当然与问题中所说的使用isRemoveLineWhenBlank属性配合使用）。

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>

iReport中的报表设计： iReport 中的设计

隐藏整行的结果： P1=空，P2=空，P3=3，P4=4

隐藏第一列第一行中唯一一个字段的结果： P1=空，P2=2，P3=3，P4=4

score 0 · Accepted Answer

解决方案不是框架。

将 printWhenExpression 添加到文本字段：

<printWhenExpression><![CDATA[$P{par1}!=null]]></printWhenExpression></reportElement>

样本：

<textField isBlankWhenNull="true">
<reportElement x="719" y="0" width="52" height="11">
    <printWhenExpression><![CDATA[$P{par1}!=null]]></printWhenExpression>
</reportElement>
<box>
    <topPen lineWidth="1.0"/>
    <leftPen lineWidth="1.0"/>
    <bottomPen lineWidth="1.0"/>
    <rightPen lineWidth="1.0"/>
</box>
<textElement />
<textFieldExpression><![CDATA[$P{par1}]]></textFieldExpression>

java - iReport：如何在没有数据行的情况下隐藏带有文本字段的行包含不同类型的数据

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