如何拉伸子报表以适合父级高度？

问题描述 投票：0回答：1

我刚刚开始使用 JasperReports，我偶然发现了一个我似乎找不到解决方案的问题。

我有一个包含子报告的报告，用于创建一个包含 2 列的表格。我需要拉伸子报表中的文本字段以适合第一列的高度。

基本上这就是我得到的

这就是我想要的（我使用静态高度来实现它）

这是报告的代码

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.0.0.final using JasperReports Library version 6.0.0  -->
<!-- 2023-08-21T21:38:25 -->
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="monitoringBulletinRainSensors" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="dc5d5b62-3121-47f6-bc9c-a0c86a6de260">
    <property name="ireport.zoom" value="1.0"/>
    <property name="ireport.x" value="0"/>
    <property name="ireport.y" value="0"/>
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="test"/>
    <parameter name="SUBREPORT_DIR" class="java.lang.String" isForPrompting="false">
        <defaultValueExpression><![CDATA["C:\\Users\\<user>\\JaspersoftWorkspace\\MyReports\\"]]></defaultValueExpression>
    </parameter>
    <queryString language="json">
        <![CDATA[]]>
    </queryString>
    <field name="text" class="java.lang.String"/>
    <detail>
        <band height="10" splitType="Prevent">
            <property name="local_mesure_unitheight" value="pixel"/>
            <property name="com.jaspersoft.studio.unit.height" value="px"/>
            <textField isStretchWithOverflow="true">
                <reportElement key="" stretchType="RelativeToBandHeight" x="0" y="0" width="50" height="10" uuid="17091a86-28eb-4f4b-814e-2049fc13b754">
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                    <property name="local_mesure_unitwidth" value="pixel"/>
                    <property name="com.jaspersoft.studio.unit.width" value="px"/>
                </reportElement>
                <box>
                    <topPen lineWidth="0.5" lineStyle="Solid" lineColor="#000000"/>
                    <leftPen lineWidth="0.5" lineStyle="Solid" lineColor="#000000"/>
                    <bottomPen lineWidth="0.5" lineStyle="Solid" lineColor="#000000"/>
                    <rightPen lineWidth="0.5" lineStyle="Solid" lineColor="#000000"/>
                </box>
                <textElement>
                    <font size="16"/>
                </textElement>
                <textFieldExpression><![CDATA[$F{text}]]></textFieldExpression>
            </textField>
            <subreport>
                <reportElement stretchType="RelativeToTallestObject" x="50" y="0" width="100" height="10" isPrintInFirstWholeBand="true" backcolor="#FFFFFF" uuid="d8d61ef2-ee12-437a-be7d-9514dc16438d">
                    <property name="com.jaspersoft.studio.unit.y" value="pixel"/>
                    <property name="local_mesure_unitheight" value="pixel"/>
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                    <property name="local_mesure_unitwidth" value="pixel"/>
                    <property name="com.jaspersoft.studio.unit.width" value="px"/>
                </reportElement>
                <dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("children")]]></dataSourceExpression>
                <subreportExpression><![CDATA[$P{SUBREPORT_DIR} + "test_child.jasper"]]></subreportExpression>
            </subreport>
        </band>
    </detail>
</jasperReport>

这是子报表的代码

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.0.0.final using JasperReports Library version 6.0.0  -->
<!-- 2023-08-21T21:38:06 -->
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="test_child" pageWidth="595" pageHeight="842" columnWidth="595" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="6ee7b94c-7f06-43f8-a02a-461787c5be45">
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
    <property name="com.jaspersoft.studio.unit." value="pixel"/>
    <property name="com.jaspersoft.studio.unit.pageHeight" value="pixel"/>
    <property name="com.jaspersoft.studio.unit.pageWidth" value="pixel"/>
    <property name="com.jaspersoft.studio.unit.topMargin" value="pixel"/>
    <property name="com.jaspersoft.studio.unit.bottomMargin" value="pixel"/>
    <property name="com.jaspersoft.studio.unit.leftMargin" value="pixel"/>
    <property name="com.jaspersoft.studio.unit.rightMargin" value="pixel"/>
    <property name="com.jaspersoft.studio.unit.columnWidth" value="pixel"/>
    <property name="com.jaspersoft.studio.unit.columnSpacing" value="pixel"/>
    <queryString>
        <![CDATA[]]>
    </queryString>
    <field name="text" class="java.lang.String"/>
    <background>
        <band splitType="Stretch"/>
    </background>
    <detail>
        <band height="30" splitType="Prevent">
            <textField isStretchWithOverflow="true">
                <reportElement positionType="Float" stretchType="RelativeToBandHeight" x="0" y="0" width="160" height="30" uuid="bcfd27d0-fc93-42bd-82fb-74a8d95ed706">
                    <property name="local_mesure_unitheight" value="pixel"/>
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                    <property name="local_mesure_unity" value="pixel"/>
                    <property name="com.jaspersoft.studio.unit.y" value="px"/>
                </reportElement>
                <box>
                    <topPen lineWidth="0.5" lineStyle="Solid" lineColor="#000000"/>
                    <leftPen lineWidth="0.5" lineStyle="Solid" lineColor="#000000"/>
                    <bottomPen lineWidth="0.5" lineStyle="Solid" lineColor="#000000"/>
                    <rightPen lineWidth="0.5" lineStyle="Solid" lineColor="#000000"/>
                </box>
                <textElement>
                    <font size="16"/>
                </textElement>
                <textFieldExpression><![CDATA[$F{text}]]></textFieldExpression>
            </textField>
        </band>
    </detail>
</jasperReport>

最后这是我正在使用的 JSON 数据源

{
    "text": "This is a very very very very very very very long text",
    "children": [
        {
            "text": "This is a short text"
        },
        {
            "text": "This is a short text"
        },
        {
            "text": "This is a short text"
        }
    ]
}

请帮助我！我真的对任何解决方案都很满意，即使是最糟糕的解决方案，只要它有效:) 谢谢！

jasper-reports
1个回答
0
投票

这里可以使用（list或table）元素。并在其中（list或table）使用另一个（list或table）。

根据您的 JSON 结构，您可以做到这一点。

这里我提到了列表，但你也可以使用表格。

  1. 首先创建一个报告，无需添加任何字段或查询。
  2. 创建一个 dataset1，其中有两个字段 text 和 children
  3. 创建dataset2，并在查询部分提及children。他们只有一个text文本文件，即儿童文本数据
  4. 使用 dataset1 添加一个 list，并在该列表上添加 text 文本字段，并在右侧添加另一个 list 用于显示 children text 数据
  5. 在第二个列表上使用 dataset2 并在该列表上添加子项 text 文本字段
  6. 然后根据您的要求选择位置类型和拉伸类型。

示例输出： Sample Output

这是报告的代码

    <?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="c" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="c9ca78e9-09e3-4234-bcd8-8cc5941a495b">
    <subDataset name="Dataset1" uuid="6a2c5d32-30c9-4945-9ee6-c2ef7b27f2c8">
        <queryString language="json">
            <![CDATA[]]>
        </queryString>
        <field name="text" class="java.lang.String">
            <property name="net.sf.jasperreports.json.field.expression" value="text"/>
            <fieldDescription><![CDATA[text]]></fieldDescription>
        </field>
        <field name="children" class="java.lang.String">
            <property name="net.sf.jasperreports.json.field.expression" value="children"/>
            <fieldDescription><![CDATA[children]]></fieldDescription>
        </field>
    </subDataset>
    <subDataset name="Dataset2" uuid="e938c415-ac02-43c5-a218-dcfcf7d80232">
        <property name="com.jaspersoft.studio.data.defaultdataadapter" value="c"/>
        <queryString language="json">
            <![CDATA[children]]>
        </queryString>
        <field name="text" class="java.lang.String">
            <property name="net.sf.jasperreports.json.field.expression" value="text"/>
            <fieldDescription><![CDATA[text]]></fieldDescription>
        </field>
    </subDataset>
    <queryString language="jsonql">
        <![CDATA[]]>
    </queryString>
    <background>
        <band splitType="Stretch"/>
    </background>
    <title>
        <band height="20" splitType="Stretch"/>
    </title>
    <pageHeader>
        <band height="21" splitType="Stretch"/>
    </pageHeader>
    <columnHeader>
        <band height="19" splitType="Stretch"/>
    </columnHeader>
    <detail>
        <band height="30" splitType="Stretch">
            <componentElement>
                <reportElement x="0" y="0" width="440" height="30" uuid="92f28b3e-ddc6-48c6-8aff-e44bf28feab0">
                    <property name="com.jaspersoft.studio.unit.CONTENTS.height" value="px"/>
                </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">
                    <datasetRun subDataset="Dataset1" uuid="dd4e597b-4228-41ba-b0d0-72fdbf85a82e">
                        <dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource()]]></dataSourceExpression>
                    </datasetRun>
                    <jr:listContents height="33" width="440">
                        <textField>
                            <reportElement stretchType="RelativeToTallestObject" x="0" y="0" width="240" height="30" uuid="ca2fbeb2-c057-4b6c-afb0-80f5e87e4530"/>
                            <box>
                                <topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                                <leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                                <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                                <rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                            </box>
                            <textElement verticalAlignment="Middle"/>
                            <textFieldExpression><![CDATA[$F{text}]]></textFieldExpression>
                        </textField>
                        <componentElement>
                            <reportElement stretchType="RelativeToTallestObject" x="240" y="0" width="200" height="30" uuid="274af469-c856-477e-8687-abcbe6008b77"/>
                            <jr:list printOrder="Vertical">
                                <datasetRun subDataset="Dataset2" uuid="512eb811-336f-401c-ac81-b08e05fa7017">
                                    <dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("children")]]></dataSourceExpression>
                                </datasetRun>
                                <jr:listContents height="30" width="200">
                                    <textField>
                                        <reportElement x="0" y="0" width="200" height="30" uuid="3c04f2b1-3287-4a18-afa6-b735af62000a"/>
                                        <box>
                                            <topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                                            <leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                                            <bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                                            <rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
                                        </box>
                                        <textElement verticalAlignment="Middle"/>
                                        <textFieldExpression><![CDATA[$F{text}]]></textFieldExpression>
                                    </textField>
                                </jr:listContents>
                            </jr:list>
                        </componentElement>
                    </jr:listContents>
                </jr:list>
            </componentElement>
        </band>
    </detail>
    <columnFooter>
        <band height="17" splitType="Stretch"/>
    </columnFooter>
    <pageFooter>
        <band height="22" splitType="Stretch"/>
    </pageFooter>
    <summary>
        <band height="14" splitType="Stretch"/>
    </summary>
</jasperReport>

最后这是我正在使用的JSON数据源

[{
    "text": "This is a very very very very very very very long text",
    "children": [
        {
            "text": "This is a short text"
        },
        {
            "text": "This is a short text"
        },
        {
            "text": "This is a short text"
        }
    ]
},
{
    "text": "This is a Second very very very very very very very long text",
    "children": [
        {
            "text": "This is a second short text"
        },
        {
            "text": "This is a second short text"
        },
        {
            "text": "This is a second short text"
        }
    ]
}]
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