JasperReports：导出一个包含公式的 xls/ods 文件

Question

最近，我不得不使用 JasperReports 以 ods /xls 格式导出一些报告。

导出工作正常，但我没能找到在导出的列之间添加一些 excel 公式的方法（让我们通过说一些列的总和来简化它，如下所述）。

当用户修改 excel 文件中的 A 列时，C 列也会被修改（基本 excel 公式，没有新内容...）

根据一些评论和回答，我已经做了这些

<detail>
<band height="134" splitType="Stretch">
    <componentElement>
            <reportElement x="-20" y="0" width="120" height="60" uuid="884b6c49-9006-464d-982e-e2a5f2cb3e3e">
                <property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
            </reportElement>
            <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="Empty Dataset1" uuid="b60c3bee-0624-4a6a-bbb1-e706521c0a9a">
                    <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource(java.util.Arrays.asList($F{dto}.getNbLgtA()))]]></dataSourceExpression>
                </datasetRun>
                <jr:column width="40" uuid="1dbb56d0-f25f-410b-9e02-d08b7fe84388">
                    <property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne1"/>
                    <jr:tableHeader height="30">
                        <staticText>
                            <reportElement x="0" y="0" width="40" height="30" uuid="ff8f394e-39ea-4d08-898f-601e92e6d1f3"/>
                            <text><![CDATA[A]]></text>
                        </staticText>
                    </jr:tableHeader>
                    <jr:detailCell height="30">
                        <staticText>
                            <reportElement x="0" y="0" width="40" height="30" uuid="c0c2b023-2d00-4080-88a3-a73f19fe9cda"/>
                            <text><![CDATA[1]]></text>
                        </staticText>
                    </jr:detailCell>
                </jr:column>
                <jr:column width="40" uuid="33f41b08-3d77-4076-9712-9514211dd3af">
                    <property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne2"/>
                    <jr:tableHeader height="30">
                        <staticText>
                            <reportElement x="0" y="0" width="40" height="30" uuid="ad2b74aa-95bf-43d7-83a4-6528f344b410"/>
                            <text><![CDATA[B]]></text>
                        </staticText>
                    </jr:tableHeader>
                    <jr:detailCell height="30">
                        <staticText>
                            <reportElement x="0" y="0" width="40" height="30" uuid="6d121f9e-e92d-45ba-9a48-82bf8b1245e0"/>
                            <text><![CDATA[2]]></text>
                        </staticText>
                    </jr:detailCell>
                </jr:column>
                <jr:column width="40" uuid="42d367d1-2be7-46bf-838b-ba4c1c6f3399">
                    <property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne3"/>
                    <jr:tableHeader height="30">
                        <staticText>
                            <reportElement x="0" y="0" width="40" height="30" uuid="63e3dd54-0297-463f-b061-4c536baf62a8"/>
                            <text><![CDATA[C]]></text>
                        </staticText>
                    </jr:tableHeader>
                    <jr:detailCell height="30">
                        <property name="net.sf.jasperreports.export.xls.formula" value="SUM(A2, B2)"/>
                    </jr:detailCell>
                </jr:column>
            </jr:table>
        </componentElement>
    </band>
</detail>

但是没用。

Answer 1

在这里您可以找到一些关于使用 Excel 公式的有用信息： http://jasperreports.sourceforge.net/sample.reference/xlsformula/index.html#xlsformula

例如下面是使用SUM公式的例子（表达式要用引号括起来）：

    <propertyExpression name="net.sf.jasperreports.export.xls.formula">
    <![CDATA["SUM(A1,B1)"]]>
    </propertyExpression>

您需要确保将报告的 isDetectCellType 属性设置为 true 才能使公式生效。一个完整的工作示例（使用空数据源）如下：

    <detail>
    <band height="134" splitType="Stretch">
        <componentElement>
            <reportElement x="-20" y="0" width="120" height="60" uuid="884b6c49-9006-464d-982e-e2a5f2cb3e3e">
                <property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
            </reportElement>
            <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="Empty Dataset1" uuid="b60c3bee-0624-4a6a-bbb1-e706521c0a9a">
                    <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.JREmptyDataSource()]]></dataSourceExpression>
                </datasetRun>
                <jr:column width="40" uuid="1dbb56d0-f25f-410b-9e02-d08b7fe84388">
                    <property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne1"/>
                    <jr:tableHeader height="30">
                        <staticText>
                            <reportElement x="0" y="0" width="40" height="30" uuid="ff8f394e-39ea-4d08-898f-601e92e6d1f3"/>
                            <text><![CDATA[A]]></text>
                        </staticText>
                    </jr:tableHeader>
                    <jr:detailCell height="30">
                        <textField pattern="">
                            <reportElement x="0" y="0" width="40" height="30" uuid="b989d9e8-64d8-467f-a8a0-7b92a1746a0d"/>
                            <textFieldExpression><![CDATA[1]]></textFieldExpression>
                        </textField>
                    </jr:detailCell>
                </jr:column>
                <jr:column width="40" uuid="33f41b08-3d77-4076-9712-9514211dd3af">
                    <property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne2"/>
                    <jr:tableHeader height="30">
                        <staticText>
                            <reportElement x="0" y="0" width="40" height="30" uuid="ad2b74aa-95bf-43d7-83a4-6528f344b410"/>
                            <text><![CDATA[B]]></text>
                        </staticText>
                    </jr:tableHeader>
                    <jr:detailCell height="30">
                        <textField pattern="">
                            <reportElement x="0" y="0" width="40" height="30" uuid="3448c5dc-f887-415d-9833-4a22ea5b06c8"/>
                            <textFieldExpression><![CDATA[2]]></textFieldExpression>
                        </textField>
                    </jr:detailCell>
                </jr:column>
                <jr:column width="40" uuid="42d367d1-2be7-46bf-838b-ba4c1c6f3399">
                    <property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne3"/>
                    <jr:tableHeader height="30">
                        <staticText>
                            <reportElement x="0" y="0" width="40" height="30" uuid="63e3dd54-0297-463f-b061-4c536baf62a8"/>
                            <text><![CDATA[C]]></text>
                        </staticText>
                    </jr:tableHeader>
                    <jr:detailCell height="30">
                        <textField pattern="">
                            <reportElement x="0" y="0" width="40" height="30" uuid="63e3ed54-0567-463f-b0c1-4c676baf62a8">
                                <propertyExpression name="net.sf.jasperreports.export.xls.formula"><![CDATA["SUM(A" +($V{PAGE_COUNT}+2) + ",B" + ($V{PAGE_COUNT}+2) +")"]]></propertyExpression>
                            </reportElement>
                            <textFieldExpression><![CDATA[3]]></textFieldExpression>
                        </textField>
                    </jr:detailCell>
                </jr:column>
            </jr:table>
        </componentElement>
    </band>
</detail>

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