jasper-reports - 使用 Order by 表达式在交叉表排序列/行组中排序

Question

我知道这里已经有一个类似的线程，但这对我不起作用。

背景:Jaspersoft Studio 6

我有一个这样的数据集:



在此数据集上创建了这样的交叉表:



如何将列组排序为 prod c、prod a、prod b 而不是当前？

我试着把这个表达式按列组的表达式排序。

$F{product}.equals("prod c")? 1 : $F{product}.equals("prod a")? 2:3

但它说



编辑:添加源，这是没有排序的版本，它运行良好，没有错误，但当然没有排序。

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.2.0.final using JasperReports Library version 6.2.0  -->
<!-- 2016-06-08T14:14:48 -->
<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="test3" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="0a3345e5-7859-4366-9ccf-b215cf60a3b0">
    <property name="com.jaspersoft.studio.data.sql.tables" value=""/>
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        </box>
    </style>
    <queryString>
        <![CDATA[select 'channel a' as "sales channel", 'prod a' as product, 1 as amount
union all select 'channel a' as salesChannel, 'prod b' as product, 1 as amount
union all select 'channel a' as salesChannel, 'prod c' as product, 1 as amount
union all select 'channel b' as salesChannel, 'prod a' as product, 1 as amount
union all select 'channel b' as salesChannel, 'prod b' as product, 1 as amount
union all select 'channel b' as salesChannel, 'prod c' as product, 1 as amount]]>
    </queryString>
    <field name="sales channel" class="java.lang.String"/>
    <field name="product" class="java.lang.String"/>
    <field name="amount" class="java.lang.Integer"/>
    <background>
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                    <property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
                </reportElement>
                <rowGroup name="sales channel1" width="60" totalPosition="End">
                    <bucket class="java.lang.String">
                        <bucketExpression><![CDATA[$F{sales channel}]]></bucketExpression>
                    </bucket>
                    <crosstabRowHeader>
                        <cellContents mode="Opaque" style="Crosstab_CH">
                            <textField>
                                <reportElement x="0" y="0" width="60" height="20" uuid="27883596-a403-4b9a-a3d5-d18adced1ec1"/>
                                <textFieldExpression><![CDATA[$V{sales channel1}]]></textFieldExpression>
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                                <reportElement x="0" y="0" width="60" height="20" forecolor="#FFFFFF" uuid="7e48fc9b-d619-4b04-8b50-4fbd6174509e"/>
                                <text><![CDATA[Total sales channel1]]></text>
                            </staticText>
                        </cellContents>
                    </crosstabTotalRowHeader>
                </rowGroup>
                <columnGroup name="product1" height="20" totalPosition="End">
                    <bucket class="java.lang.String">
                        <bucketExpression><![CDATA[$F{product}]]></bucketExpression>
                    </bucket>
                    <crosstabColumnHeader>
                        <cellContents mode="Opaque" style="Crosstab_CH">
                            <textField>
                                <reportElement x="0" y="0" width="60" height="20" uuid="81d54f8e-11ab-4841-9aef-ef224899c337"/>
                                <textFieldExpression><![CDATA[$V{product1}]]></textFieldExpression>
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                                <text><![CDATA[Total product1]]></text>
                            </staticText>
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                </columnGroup>
                <measure name="amount_MEASURE1" class="java.lang.Integer" calculation="Count">
                    <measureExpression><![CDATA[$F{amount}]]></measureExpression>
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                        <textField>
                            <reportElement x="0" y="0" width="60" height="20" uuid="cdbc8bf6-e55f-4e69-9505-d40d01870add"/>
                            <textFieldExpression><![CDATA[$V{amount_MEASURE1}]]></textFieldExpression>
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                </crosstabCell>
                <crosstabCell width="60" height="20" columnTotalGroup="product1">
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                        <textField>
                            <reportElement x="0" y="0" width="60" height="20" forecolor="#FFFFFF" uuid="3543f652-7dee-43fd-84ba-514613b8ac03"/>
                            <textFieldExpression><![CDATA[$V{amount_MEASURE1}]]></textFieldExpression>
                        </textField>
                    </cellContents>
                </crosstabCell>
                <crosstabCell width="60" height="20" rowTotalGroup="sales channel1">
                    <cellContents mode="Opaque" style="Crosstab_CT">
                        <textField>
                            <reportElement x="0" y="0" width="60" height="20" forecolor="#FFFFFF" uuid="9657bd6f-c862-4462-b88f-6ea0e049a3ad"/>
                            <textFieldExpression><![CDATA[$V{amount_MEASURE1}]]></textFieldExpression>
                        </textField>
                    </cellContents>
                </crosstabCell>
                <crosstabCell width="60" height="20" rowTotalGroup="sales channel1" columnTotalGroup="product1">
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                        <textField>
                            <reportElement x="0" y="0" width="60" height="20" forecolor="#FFFFFF" uuid="8311db87-f185-447a-b692-ce878b7fdff5"/>
                            <textFieldExpression><![CDATA[$V{amount_MEASURE1}]]></textFieldExpression>
                        </textField>
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            </crosstab>
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    </summary>
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Answer 1

正如@tobi6 在他的帖子中提到的，您可以在 orderByExpression 中使用 Measures(您还可以使用带有 $V{} 表达式的 Buckets，但这可能很难)

在您的情况下，最简单的方法是添加带有排序规则的新 Measure。

<measure name="productForSort" class="java.lang.Integer">
    <measureExpression><![CDATA[$F{product}.equals("prod b") ? 1 : $F{product}.equals("prod c") ? 2 : 3]]></measureExpression>
</measure>

之后，您可以在 orderByExpression 表达式中使用此 Measure:

<bucket class="java.lang.String">
    <bucketExpression><![CDATA[$F{product}]]></bucketExpression>
    <orderByExpression><![CDATA[$V{productForSort}]]></orderByExpression>
</bucket>

对于我的测试 csv 数据源:

sales channel, product, amount
channel a, prod c, 5
channel a, prod a, 1
channel b, prod a, 3
channel a, prod b, 1
channel b, prod b, 1

结果是这样的:



如您所见，“产品 b”将首先出现。

笔记:

问题类似(重复)一个非常棒的帖子 Jasper Reports crosstab sorting with comparatorExpression .您可以在这篇文章中找到更多信息。

我的回答与 solution 类似来自@PetterFriberg。但在这种情况下，我们可以省略 Comparator 的使用

另外两个答案也不错，特别是@AndreasDietrich 的 R&D