子报表未在主报表中呈现

Subreport not rendering in main report

我已经创建了一个 Jasper 报告,我正在尝试将该报告集成到主报告中。我能够按原样填充子报表中的数据,但是如果我将它集成到主报表中,我将无法呈现我在子报表中呈现的数据。事实上,我在集成子报表的地方将其空白。

我还给出了 REPORT_CONNECTION 的连接表达式,并给出了子报告表达式,其中包含同一项目和同一 CLASSPATH 中的 jasper 文件的位置(通过 "Table1Jasper.jasper" 这是我的子报表 Jasper 的名称)。我找不到问题,我哪里出错了。 下面是我正在处理的报告的代码片段。

This is my subreport JRXML:

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.2.0.final using JasperReports Library version 6.2.0  -->
<!-- 2015-12-29T14:51:49 -->
<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="Table1Jasper" pageWidth="250" pageHeight="842" columnWidth="250" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="168d5180-08f7-4e70-a176-9757e902e707">
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="TableOneTestFactory"/>
    <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="a" class="java.lang.String"/>
    <field name="b" class="java.lang.Integer"/>
    <background>
        <band splitType="Stretch"/>
    </background>
    <title>
        <band height="31" splitType="Stretch">
            <staticText>
                <reportElement mode="Opaque" x="10" y="0" width="230" height="30" forecolor="#6E4A85" backcolor="#E9E1ED" uuid="c96bbba0-dd6f-4572-92ea-19b5a6165ce4"/>
                <box>
                    <topPen lineWidth="1.0" lineStyle="Double"/>
                    <leftPen lineWidth="1.0" lineStyle="Double"/>
                    <bottomPen lineWidth="1.0" lineStyle="Double"/>
                    <rightPen lineWidth="1.0" lineStyle="Double"/>
                </box>
                <textElement textAlignment="Center" verticalAlignment="Middle">
                    <font size="14" isBold="true"/>
                </textElement>
                <text><![CDATA[TABLE ONES' FIELDS']]></text>
            </staticText>
        </band>
    </title>
    <columnHeader>
        <band height="60" splitType="Stretch">
            <staticText>
                <reportElement mode="Opaque" x="23" y="30" width="100" height="30" backcolor="#39FA50" uuid="611cad70-6062-4bc6-863c-bb4dbb4d5d55"/>
                <box>
                    <topPen lineWidth="0.5" lineStyle="Solid"/>
                    <leftPen lineWidth="0.5" lineStyle="Solid"/>
                    <bottomPen lineWidth="0.5" lineStyle="Solid"/>
                    <rightPen lineWidth="0.5" lineStyle="Solid"/>
                </box>
                <textElement textAlignment="Center" verticalAlignment="Middle">
                    <font size="12" isBold="true"/>
                </textElement>
                <text><![CDATA[a]]></text>
            </staticText>
            <staticText>
                <reportElement mode="Opaque" x="123" y="30" width="100" height="30" backcolor="#39FA50" uuid="77893362-087e-4df0-9ca3-48acf820741f"/>
                <box>
                    <topPen lineWidth="0.5" lineStyle="Solid"/>
                    <leftPen lineWidth="0.5" lineStyle="Solid"/>
                    <bottomPen lineWidth="0.5" lineStyle="Solid"/>
                    <rightPen lineWidth="0.5" lineStyle="Solid"/>
                </box>
                <textElement textAlignment="Center" verticalAlignment="Middle">
                    <font size="12" isBold="true"/>
                </textElement>
                <text><![CDATA[b]]></text>
            </staticText>
        </band>
    </columnHeader>
    <detail>
        <band height="29" splitType="Stretch">
            <textField>
                <reportElement mode="Opaque" x="23" y="-1" width="100" height="30" backcolor="#C28C8C" uuid="05928dbf-95d4-491b-9ef5-905a1fa18b2a"/>
                <box>
                    <topPen lineWidth="0.5" lineStyle="Solid"/>
                    <leftPen lineWidth="0.5" lineStyle="Solid"/>
                    <bottomPen lineWidth="0.5" lineStyle="Solid"/>
                    <rightPen lineWidth="0.5" lineStyle="Solid"/>
                </box>
                <textElement textAlignment="Center" verticalAlignment="Middle"/>
                <textFieldExpression><![CDATA[$F{a}]]></textFieldExpression>
            </textField>
            <textField>
                <reportElement mode="Opaque" x="123" y="-1" width="100" height="30" backcolor="#C28C8C" uuid="54082691-6a9e-4c28-b960-b729bdae9458"/>
                <box>
                    <topPen lineWidth="0.5" lineStyle="Solid"/>
                    <leftPen lineWidth="0.5" lineStyle="Solid"/>
                    <bottomPen lineWidth="0.5" lineStyle="Solid"/>
                    <rightPen lineWidth="0.5" lineStyle="Solid"/>
                </box>
                <textElement textAlignment="Center" verticalAlignment="Middle"/>
                <textFieldExpression><![CDATA[$F{b}]]></textFieldExpression>
            </textField>
        </band>
    </detail>
</jasperReport>

This is my Main report JRXML, where I am integrating my subreport.

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.2.0.final using JasperReports Library version 6.2.0  -->
<!-- 2015-12-29T14:14:23 -->
<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="MainReport" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="a0a24146-f700-4edb-8746-7825a1fa923d">
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="TableOneTestFactory"/>
    <queryString>
        <![CDATA[]]>
    </queryString>
    <background>
        <band splitType="Stretch"/>
    </background>
    <title>
        <band height="79" splitType="Stretch">
            <staticText>
                <reportElement mode="Opaque" x="0" y="0" width="560" height="30" forecolor="#000000" backcolor="#834EED" uuid="5f92ae14-f194-4e5e-bf26-8f11a9335900"/>
                <box>
                    <topPen lineWidth="1.0" lineStyle="Double"/>
                    <leftPen lineWidth="1.0" lineStyle="Double"/>
                    <bottomPen lineWidth="1.0" lineStyle="Double"/>
                    <rightPen lineWidth="1.0" lineStyle="Double"/>
                </box>
                <textElement textAlignment="Center" verticalAlignment="Middle">
                    <font size="20" isBold="true"/>
                </textElement>
                <text><![CDATA[Main Report]]></text>
            </staticText>
        </band>
    </title>
    <columnHeader>
        <band height="61" splitType="Stretch"/>
    </columnHeader>
    <detail>
        <band height="329" splitType="Stretch">
            <subreport>
                <reportElement x="0" y="90" width="560" height="60" uuid="021bbef9-3a86-48a1-a15f-64627101521f"/>
                <connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
                <subreportExpression><![CDATA["Table1Jasper.jasper"]]></subreportExpression>
            </subreport>
        </band>
    </detail>
    <columnFooter>
        <band height="45" splitType="Stretch"/>
    </columnFooter>
    <pageFooter>
        <band height="54" splitType="Stretch"/>
    </pageFooter>
    <summary>
        <band height="42" splitType="Stretch"/>
    </summary>
</jasperReport>

请帮我找到我的问题,请给我一个解决方案。

你可以使用相对路径到你的子报表,你需要使用绝对路径.

这通常是通过使用参数(使用默认表达式)来实现的。

例子

<parameter name="SUBREPORT_DIR" class="java.lang.String" isForPrompting="false">
    <defaultValueExpression><![CDATA["C:\The\Path\To\Subreport\"]]></defaultValueExpression>
</parameter>

并且调用子报表时

<subreportExpression><![CDATA[$P{SUBREPORT_DIR} + "Table1Jasper.jasper"]]></subreportExpression>

参数的使用可以帮助您部署应用程序,例如,您可以在 java 中评估应用程序的相对路径,并将其作为绝对路径传递给参数映射中的报告。

java中的示例(在参数映射中设置参数)。

parameterMap.put("SUBREPORT_DIR", new File("theRelativeSubReportDir").getAbsolutePath() + File.separator);

并且...请记住,当您更改子报表时,您始终需要重新编译成 .jasper