這裏有一種方法，假設serialNo是某種數值而不是字符串。
- sql查詢結果的數據集必須按
serialNo排序，如上所示。
- 使用以下組表達式創建
Report Group：$V{GroupCount} == new BigDecimal(0) ? $F{serialNo}:$F{serialNo}.subtract($V{GroupCount})。這將在serialNo序列中每次出現間隙時創建一個新組。
- 創建一個變量
GroupCount，該變量計算當前組中連續的serialNo值的數量。該變量用於跟蹤下一個預期值serialNo的值。
- 創建一個變量
StartRange，該變量將保存給定範圍的連續serialNo值的起始值。該值應在新組的開始時重置，並具有以下值：$V{GroupCount}.intValue() == 1 ? $F{ID}:$V{StartRange}。
- 將
serialNo字段的Evaluation Time值設置爲ReportGroup。把下面的值放在它裏面：$V{StartRange}+" - " + $F{serialNo}。
- 將
Detail頻段的Print When Expression更改爲以下網址：new Boolean($V{GroupCount}.intValue() == 1)。
我已在下面發佈完整的jrxml代碼。
<?xml version="1.0" encoding="utf-8"?>
<!-- Created with iReport - A designer for JasperReports -->
<!DOCTYPE jasperReport PUBLIC "//JasperReports//DTD Report Design//EN"
"http://jasperreports.sourceforge.net/dtds/jasperreport.dtd">
<jasperReport name="Group_By_Consecutive" columnCount="1" printOrder="Vertical" orientation="Portrait" pageWidth="595" pageHeight="842" columnWidth="535" columnSpacing="0" leftMargin="30" rightMargin="30" topMargin="20" bottomMargin="20" whenNoDataType="NoPages" isTitleNewPage="false" isSummaryNewPage="false">
<property name="ireport.scriptlethandling" value="0" />
<property name="ireport.encoding" value="UTF-8" />
<import value="java.util.*" />
<import value="net.sf.jasperreports.engine.*" />
<import value="net.sf.jasperreports.engine.data.*" />
<queryString>
<![CDATA[select 1 as id, 'Name 1' as name from dual union all
select 2 as id, 'Name 2' as name from dual union all
select 3 as id, 'Name 3' as name from dual union all
select 4 as id, 'Name 4' as name from dual union all
select 6 as id, 'Name 6' as name from dual union all
select 7 as id, 'Name 7' as name from dual union all
select 8 as id, 'Name 8' as name from dual union all
select 9 as id, 'Name 9' as name from dual union all
select 10 as id, 'Name 10' as name from dual union all
select 11 as id, 'Name 11' as name from dual union all
select 14 as id, 'Name 14' as name from dual union all
select 15 as id, 'Name 15' as name from dual union all
select 16 as id, 'Name 16' as name from dual union all
select 17 as id, 'Name 17' as name from dual union all
select 23 as id, 'Name 23' as name from dual union all
select 24 as id, 'Name 24' as name from dual union all
select 25 as id, 'Name 25' as name from dual union all
select 26 as id, 'Name 26' as name from dual union all
select 27 as id, 'Name 27' as name from dual union all
select 28 as id, 'Name 28' as name from dual]]>
</queryString>
<field name="ID" class="java.math.BigDecimal" />
<field name="NAME" class="java.lang.String" />
<variable name="GroupCount" class="java.math.BigDecimal" resetType="Group" resetGroup="Consecutive" calculation="Count">
<variableExpression>
<![CDATA[$F{ID}]]>
</variableExpression>
<initialValueExpression>
<![CDATA[new BigDecimal(0)]]>
</initialValueExpression>
</variable>
<variable name="StartRange" class="java.math.BigDecimal" resetType="Report" calculation="Nothing">
<variableExpression>
<![CDATA[$V{GroupCount}.intValue() == 1 ? $F{ID}:$V{StartRange}]]>
</variableExpression>
</variable>
<group name="Consecutive">
<groupExpression>
<![CDATA[$V{GroupCount} == new BigDecimal(0) ? $F{ID}:$F{ID}.subtract($V{GroupCount})]]>
</groupExpression>
<groupHeader>
<band height="0" isSplitAllowed="true"></band>
</groupHeader>
<groupFooter>
<band height="0" isSplitAllowed="true"></band>
</groupFooter>
</group>
<background>
<band height="0" isSplitAllowed="true"></band>
</background>
<title>
<band height="0" isSplitAllowed="true"></band>
</title>
<pageHeader>
<band height="0" isSplitAllowed="true"></band>
</pageHeader>
<columnHeader>
<band height="18" isSplitAllowed="true">
<staticText>
<reportElement x="0" y="0" width="200" height="18" key="staticText-1" />
<box></box>
<textElement>
<font />
</textElement>
<text>
<![CDATA[serialNo]]>
</text>
</staticText>
<staticText>
<reportElement x="200" y="0" width="100" height="18" key="staticText-3" />
<box></box>
<textElement>
<font />
</textElement>
<text>
<![CDATA[Name]]>
</text>
</staticText>
<staticText>
<reportElement x="300" y="0" width="100" height="18" key="staticText-4" />
<box></box>
<textElement>
<font />
</textElement>
<text>
<![CDATA[MetaData(Ignore)]]>
</text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="18" isSplitAllowed="true">
<printWhenExpression>
<![CDATA[new Boolean($V{GroupCount}.intValue() == 1)]]>
</printWhenExpression>
<textField isStretchWithOverflow="false" isBlankWhenNull="false" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self">
<reportElement x="200" y="0" width="100" height="18" key="textField" />
<box></box>
<textElement>
<font />
</textElement>
<textFieldExpression class="java.lang.String">
<![CDATA[$F{NAME}]]>
</textFieldExpression>
</textField>
<textField isStretchWithOverflow="false" pattern="##0.00" isBlankWhenNull="false" evaluationTime="Group" evaluationGroup="Consecutive" hyperlinkType="None" hyperlinkTarget="Self">
<reportElement x="0" y="0" width="200" height="18" key="textField" />
<box></box>
<textElement>
<font />
</textElement>
<textFieldExpression class="java.lang.String">
<![CDATA[$V{StartRange}+" - " + $F{ID}]]>
</textFieldExpression>
</textField>
<textField isStretchWithOverflow="false" pattern="##0.00" isBlankWhenNull="false" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self">
<reportElement x="300" y="0" width="100" height="18" key="textField" />
<box></box>
<textElement>
<font />
</textElement>
<textFieldExpression class="java.math.BigDecimal">
<![CDATA[$V{GroupCount}]]>
</textFieldExpression>
</textField>
</band>
</detail>
<columnFooter>
<band height="0" isSplitAllowed="true"></band>
</columnFooter>
<pageFooter>
<band height="0" isSplitAllowed="true"></band>
</pageFooter>
<summary>
<band height="0" isSplitAllowed="true"></band>
</summary>
</jasperReport>
在orcale中有一種方法可以創建一個查詢，以便爲您提供這樣的結果。除了它會列出SerialNo爲98729,98730,98731 – Sibster
你是對的，必須有一種方法實現我想要使用查詢，但我想通過使用jasper報告解決方案 - iReport。 –
您可能可以使用ireport中的數據透視表執行此操作。 – Sibster