使用 JsonDataSource

编程问答 2022-05-17

问题描述

我有 3 个 .jrxml（主报表、子报表和子报表中的子报表）并从 JSON 获取数据。我发送的子报告 jasper 文件的路径类似参数（第一个子报告 - sub_jasper_report，第二个子报告 - sub_jasper_report2）

JSON

{
  "name1": "",  "joints": [
    {
      "name2": "1",      "zones": [
        {
          "name3": "1"
        },        {
          "name3": "2"
        }
      ]
    },    {
      "name2": "2",        {
          "name3": "2"
        }
      ]
    }
  ]
}

主报告中的子报告（我在子报告中发送数组关节并且它有效）

<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource) $P{REPORT_DATA_SOURCE}).subDataSource("joints")]]></dataSourceExpression>
<subreportExpression><![CDATA[$P{sub_jasper_report}]]></subreportExpression>

在第一个子报表字段中，“名称”工作正常。但是第一个子报告也有子报告（区域），我也尝试发送。

<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource) $P{REPORT_DATA_SOURCE}).subDataSource("joints.zones")]]></dataSourceExpression>
<subreportExpression><![CDATA[$P{sub_jasper_report2}]]></subreportExpression>

但是在第二个子报告（子报告的子报告）中，“名称”不起作用。

看起来我不仅要在主报告中发送参数（.jrxl 的路径），还要在第一个子报告中发送参数。但我不知道如何。

主报告

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.16.0.final using JasperReports Library version 6.16.0-48579d909b7943b64690c65c71e07e0b80981928  -->
<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="RK_GOST_RUS" pageWidth="842" pageHeight="595" orientation="Landscape" columnWidth="758" leftMargin="56" rightMargin="28" topMargin="28" bottomMargin="28" uuid="2fecaf74-39aa-42a2-9e1d-4ef078bb2bc2">
    <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"/>
    <parameter name="sub_jasper_report" class="net.sf.jasperreports.engine.JasperReport" isForPrompting="false">
        <parameterDescription><![CDATA[Subreport]]></parameterDescription>
    </parameter>
    <queryString>
        <![CDATA[]]>
    </queryString>
    <field name="A9" class="java.lang.String">
        <fieldDescription><![CDATA[name1]]></fieldDescription>
    </field>
    <detail>
        <band height="10" splitType="Stretch">
            <subreport>
                <reportElement x="0" y="0" width="758" height="10" uuid="74977f92-bc0b-4e05-8335-a22d78db9898">
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                </reportElement>
                <dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource) $P{REPORT_DATA_SOURCE}).subDataSource("joints")]]></dataSourceExpression>
                <subreportExpression><![CDATA[$P{sub_jasper_report}]]></subreportExpression>
            </subreport>
            <textField textAdjust="ScaleFont">
                <reportElement stretchType="ContainerHeight" x="350" y="114" width="408" height="22" uuid="6aec8b48-d3b7-443f-8ac7-3ee2fa611aee">
                    <property name="com.jaspersoft.studio.unit.width" value="px"/>
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                </reportElement>
                <box padding="1">
                    <bottomPen lineWidth="0.5"/>
                    <rightPen lineWidth="0.5"/>
                </box>
                <textElement textAlignment="Left" verticalAlignment="Middle">
                    <font fontName="Liberation Serif" size="7" isBold="true" isUnderline="true"/>
                </textElement>
                <textFieldExpression><![CDATA[$F{A9}]]></textFieldExpression>
            </textField>
        </band>
        <band height="119">
    </detail>
</jasperReport>

第一个子报表

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.16.0.final using JasperReports Library version 6.16.0-48579d909b7943b64690c65c71e07e0b80981928  -->
<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="RK_GOST_RUS_SUB1" pageWidth="842" pageHeight="595" orientation="Landscape" columnWidth="758" leftMargin="56" rightMargin="28" topMargin="28" bottomMargin="28" uuid="2fecaf74-39aa-42a2-9e1d-4ef078bb2bc2">
    <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"/>
    <parameter name="sub_jasper_report" class="net.sf.jasperreports.engine.JasperReport" isForPrompting="false">
        <parameterDescription><![CDATA[Subreport]]></parameterDescription>
    </parameter>
    <queryString>
        <![CDATA[]]>
    </queryString>
    <field name="A9" class="java.lang.String">
        <fieldDescription><![CDATA[name2]]></fieldDescription>
    </field>
    <detail>
        <band height="10" splitType="Stretch">
            <subreport>
                <reportElement x="0" y="0" width="758" height="10" uuid="74977f92-bc0b-4e05-8335-a22d78db9898">
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                </reportElement>
                <dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource) $P{REPORT_DATA_SOURCE}).subDataSource("zones")]]></dataSourceExpression>
                <subreportExpression><![CDATA[$P{sub_jasper_report}]]></subreportExpression>
            </subreport>
            <textField textAdjust="ScaleFont">
                <reportElement stretchType="ContainerHeight" x="350" y="114" width="408" height="22" uuid="6aec8b48-d3b7-443f-8ac7-3ee2fa611aee">
                    <property name="com.jaspersoft.studio.unit.width" value="px"/>
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                </reportElement>
                <box padding="1">
                    <bottomPen lineWidth="0.5"/>
                    <rightPen lineWidth="0.5"/>
                </box>
                <textElement textAlignment="Left" verticalAlignment="Middle">
                    <font fontName="Liberation Serif" size="7" isBold="true" isUnderline="true"/>
                </textElement>
                <textFieldExpression><![CDATA[$F{A9}]]></textFieldExpression>
            </textField>
        </band>
        <band height="119">
    </detail>
</jasperReport>

第二个子报告

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.16.0.final using JasperReports Library version 6.16.0-48579d909b7943b64690c65c71e07e0b80981928  -->
<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="RK_GOST_RUS_SUB1" pageWidth="842" pageHeight="595" orientation="Landscape" columnWidth="758" leftMargin="56" rightMargin="28" topMargin="28" bottomMargin="28" uuid="2fecaf74-39aa-42a2-9e1d-4ef078bb2bc2">
    <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="A9" class="java.lang.String">
        <fieldDescription><![CDATA[name3]]></fieldDescription>
    </field>
    <detail>
        <band height="10" splitType="Stretch">
            <textField textAdjust="ScaleFont">
                <reportElement stretchType="ContainerHeight" x="350" y="114" width="408" height="22" uuid="6aec8b48-d3b7-443f-8ac7-3ee2fa611aee">
                    <property name="com.jaspersoft.studio.unit.width" value="px"/>
                    <property name="com.jaspersoft.studio.unit.height" value="px"/>
                </reportElement>
                <box padding="1">
                    <bottomPen lineWidth="0.5"/>
                    <rightPen lineWidth="0.5"/>
                </box>
                <textElement textAlignment="Left" verticalAlignment="Middle">
                    <font fontName="Liberation Serif" size="7" isBold="true" isUnderline="true"/>
                </textElement>
                <textFieldExpression><![CDATA[$F{A9}]]></textFieldExpression>
            </textField>
        </band>
        <band height="119">
    </detail>
</jasperReport>

程序中的功能，都适用于一个子报表，但不适用于子报表中的子报表。我通过字段描述从json中获取数据并将F（字段）放在“文本字段”中。

fun createJasper(
        jasperName: String,parameter: Map<String,Any>,json: ByteArray,): JasperPrint? {
        
        val jasperReport = JRLoader.loadObject(javaClass.classLoader.getResourceAsStream(jasperName)) as JasperReport
        
        return JasperFillManager.fillReport(
            jasperReport,parameter,// Path to Subreports
            if (json.isEmpty()) JREmptyDataSource() else JsonDataSource(ByteArrayInputStream(json))
        )
    }

解决方法

哦，我只需要将参数从主报表发送到子报表。并且仍然只使用参数

<subreportParameter name="sub_jasper_report">
    <subreportParameterExpression><![CDATA[$P{sub_jasper_report}]]></subreportParameterExpression>
</subreportParameter>
<subreportParameter name="sub_jasper_report2">
    <subreportParameterExpression><![CDATA[$P{sub_jasper_report2}]]></subreportParameterExpression>
</subreportParameter>
<subreportParameter name="sub_jasper_report3">
    <subreportParameterExpression><![CDATA[$P{sub_jasper_report3}]]></subreportParameterExpression>
</subreportParameter>
jasper-reportsjsonsubreport

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