我正在尝试使用由 JAVA 函数传递的 JSONDatasource 创建 JasperReport。
这是我发送给 jasper 的 JSON
{
"Person": {
"FirstName": "John",
"LastName": "Smith",
"Contacts": [
{
"Type": "Cell",
"Number": "555-555-5555"
},
{
"Type": "Home",
"Number": "666-666-6666"
}
]
}
}
我正在尝试在表格中显示电话号码。我可以很好地显示其他字段。但不知道如何显示该表。
这是我定义 Jasper 字段的方式
<field name="FirstName" class="java.lang.String">
<property name="net.sf.jasperreports.json.field.expression" value="Person.FirstName"/>
</field>
<field name="LastName" class="java.lang.String">
<<property name="net.sf.jasperreports.json.field.expression" value="Person.LastName"/>
</field>
<field name="Contacts" class="java.lang.String">
<property name="net.sf.jasperreports.json.field.expression" value="Person.Contacts"/>
</field>
随着JSON语言，您只能通过以下方式访问联系人嵌套数组subDataset，您可以用它填充 Table 组件。这是一个完整的示例（我已删除生成的样式以保持示例紧凑）：
<?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="Report" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="81afe112-ee1b-4443-8d1c-cb6d9ab95dd8">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="stackoverflow/JSON_array_table/DataAdapter.xml"/>
<subDataset name="ContactsSubdataset" uuid="4563e834-a9e5-43b5-9f0a-824948c73c73">
<field name="Type" class="java.lang.String">
<property name="net.sf.jasperreports.json.field.expression" value="Type"/>
</field>
<field name="Number" class="java.lang.String">
<property name="net.sf.jasperreports.json.field.expression" value="Number"/>
</field>
</subDataset>
<queryString language="json">
<![CDATA[]]>
</queryString>
<field name="FirstName" class="java.lang.String">
<property name="net.sf.jasperreports.json.field.expression" value="Person.FirstName"/>
</field>
<field name="LastName" class="java.lang.String">
<property name="net.sf.jasperreports.json.field.expression" value="Person.LastName"/>
</field>
<detail>
<band height="300" splitType="Stretch">
<staticText>
<reportElement x="0" y="0" width="80" height="30" uuid="d59811d6-a4e9-4871-a64b-f332d049e551"/>
<text><![CDATA[First Name:]]></text>
</staticText>
<staticText>
<reportElement x="0" y="30" width="80" height="30" uuid="ef25edff-1c33-4ec4-8dd1-21766039e6e3"/>
<text><![CDATA[Last Name:]]></text>
</staticText>
<staticText>
<reportElement x="0" y="60" width="80" height="30" uuid="e74bfa48-5040-4655-b419-f4f8e9f7e871"/>
<text><![CDATA[Contacts:]]></text>
</staticText>
<textField>
<reportElement x="80" y="0" width="200" height="30" uuid="49d1558c-396f-4864-b71f-41b6c7d677c2"/>
<textFieldExpression><![CDATA[$F{FirstName}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="80" y="30" width="200" height="30" uuid="8ddaca45-a124-4c67-b2a8-50f7188097f9"/>
<textFieldExpression><![CDATA[$F{LastName}]]></textFieldExpression>
</textField>
<componentElement>
<reportElement x="80" y="60" width="200" height="60" uuid="105c3994-b8a8-4085-81ef-4a0e55efc7c6"/>
<jr:table 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="ContactsSubdataset" uuid="5459bdfb-6835-4007-8e56-566716c8c29c">
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("Person.Contacts")]]></dataSourceExpression>
</datasetRun>
<jr:column width="100" uuid="b3d4c078-f65a-4213-9644-83b85b425703">
<jr:columnHeader height="30">
<staticText>
<reportElement x="0" y="0" width="100" height="30" uuid="4b972b67-2f1a-4843-857e-c735dfc59c82"/>
<text><![CDATA[Type]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell height="30">
<textField>
<reportElement x="0" y="0" width="100" height="30" uuid="e618a748-3273-476d-95c5-4d232260bf0a"/>
<textFieldExpression><![CDATA[$F{Type}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="100" uuid="5b01cf7c-71bc-474a-9858-ef58479efcdc">
<jr:columnHeader height="30">
<staticText>
<reportElement x="0" y="0" width="100" height="30" uuid="394f2626-8c49-491d-a09c-ef7f90132741"/>
<text><![CDATA[Number]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell height="30">
<textField>
<reportElement x="0" y="0" width="100" height="30" uuid="40ddb342-5be4-43bf-9fb2-a1fda76f53af"/>
<textFieldExpression><![CDATA[$F{Number}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
</jasperReport>
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