我想创建一个订单商品列表;对于每个项目,我想显示“项目ID”和“地址行”字段;前一个字段的数据来自项目上的子元素,但后者的数据必须使用项目中引用的唯一ID从项目父项的兄弟中获取。
我已经创建了一个简化的xml数据源并报告,以说明问题。 xml数据定义如下:
<data>
<productorder>
<item>
<id>10001</id>
<installationAddressId>1</installationAddressId>
</item>
<item>
<id>10002</id>
<installationAddressId>3</installationAddressId>
</item>
</productorder>
<address>
<id>1</id>
<addressLine>Street 1, 12345 Berlin Germany</addressLine>
</address>
<address>
<id>2</id>
<addressLine>Street 2, 12345 Berlin Germany</addressLine>
</address>
<address>
<id>3</id>
<addressLine>Street 3, 12345 Berlin Germany</addressLine>
</address>
</data>
简单(不正确)的报告是:
<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="SimpleOrderItemReport" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="0d316a3a-9d1c-4483-bf7d-d1bd9165e0cb">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="SimpleOrderItemReportDataAdapter"/>
<subDataset name="OrderItemList" uuid="c1a7dc7b-2bc3-4f1f-bab9-ae6e3b207739">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="SimpleOrderItemReportDataAdapter"/>
<queryString language="xPath">
<![CDATA[/data/productorder/item]]>
</queryString>
<field name="id_1" class="java.lang.String">
<fieldDescription><![CDATA[id]]></fieldDescription>
</field>
<field name="installationAddressId_1" class="java.lang.String">
<fieldDescription><![CDATA[installationAddressId]]></fieldDescription>
</field>
<field name="addressLine" class="java.lang.String">
<fieldDescription><![CDATA[../../address/addressLine]]></fieldDescription>
</field>
</subDataset>
<queryString language="xPath">
<![CDATA[/data]]>
</queryString>
<detail>
<band height="125" splitType="Stretch">
<componentElement>
<reportElement x="124" y="19" width="390" height="30" uuid="84a1e8b2-13df-4391-9cdd-39a9d4d79434"/>
<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">
<datasetRun subDataset="OrderItemList" uuid="0d232993-a132-45ff-813c-d00d8a685d9e">
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JRXmlDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("/data/productorder/item")]]></dataSourceExpression>
</datasetRun>
<jr:listContents height="30" width="390">
<textField>
<reportElement x="40" y="0" width="40" height="30" uuid="2b9a8530-32e3-4ecb-8dc4-3d8d9d30b191"/>
<textElement textAlignment="Left" verticalAlignment="Top"/>
<textFieldExpression><![CDATA[$F{id_1}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="190" y="0" width="200" height="30" uuid="d570993d-201b-4a43-9147-73036dd0cf11"/>
<textElement textAlignment="Left" verticalAlignment="Top"/>
<textFieldExpression><![CDATA[$F{addressLine}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="0" y="0" width="40" height="30" uuid="b96b0be3-fa58-42f1-8270-004a08a7c3df"/>
<textElement verticalAlignment="Top"/>
<text><![CDATA[Item ID:]]></text>
</staticText>
<staticText>
<reportElement x="90" y="0" width="100" height="30" uuid="f85e298c-e3e0-42e3-bd0d-fc7c7808c2f1"/>
<textElement verticalAlignment="Top"/>
<text><![CDATA[Address Line:]]></text>
</staticText>
</jr:listContents>
</jr:list>
</componentElement>
</band>
</detail>
</jasperReport>
对于上面提供的xml数据,我想在报告中看到以下两行:
我似乎无法找到可实现此目标的字段描述或xpath查询。有谁知道怎么做才能得到我想要的结果?
答案 0 :(得分:1)
如果将JasperReports与Xalan一起用作XPath执行者(并且这是默认配置,请参阅net.sf.jasperreports.xpath.executer.factory),您可以使用XSLT current
函数来引用当前节点。 / p>
在您的情况下,该字段应如下所示:
<field name="addressLine" class="java.lang.String">
<fieldDescription><![CDATA[../../address[id = current()/installationAddressId]/addressLine]]></fieldDescription>
</field>