asperreports中的JRBeanCollectionDa

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如何使用Jasperreports中的JRBeanCollectionDatasource创建相同类型但具有不同数据的多个图表

本文介绍了如何使用Jasperreports中的JRBeanCollectionDatasource创建相同类型但具有不同数据的多个图表的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我必须使用相同的图表报告模板创建具有不同数据集的多个XY线图，我还必须使用JRBeanCollectionDatasource。

I have to create multiple XY-line charts with different dataset using same chart report template and I also have to use JRBeanCollectionDatasource for it.

要求：

1）应使用JRBeanCollectionDatasource完成。

1) Should be done using JRBeanCollectionDatasource.

2）必须使用相同的图表报告模板以创建多个图表。

2) Have to use the same chart report template to create multiple charts.

3）图表数量不固定（这里我有问题在java中为报告参数命名）。因为在ReportParametersMap中，它们只能有唯一的键名。

3) Number of charts are not fixed (Here I have problem giving names to Report Parameter in java). Because in ReportParametersMap, they can only have unique key name .

Java：

Coordinates.java

Coordinates.java

private Number series;
private Number xCoordinate;
private Number yCoordinate;
//Getters & Setters

GenerateReport.java

GenerateReport.java

我是使用报表簿和报表簿的每个报表模板都被视为子报表。所以我将 XYChartDataSource （java.util.List）传递给主报表，我将使用
将此参数映射到子报表new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource（$ P {XYChartDataSource}）作为数据源表达式。

I am working with Report Book and each report template of the report book is considered as a sub-report. So I am passing XYChartDataSource(java.util.List) to master report book and I would map this parameter with the subreport by using new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{XYChartDataSource}) as a Datasource Expression.

并在子报表中，我在MainDataset中创建了一个参数 XYChartDataSource （java.util.List）并创建了字段（series，xCoordinate，yCoordinate）

and in Subreport, I have created a parameter XYChartDataSource(java.util.List) and created fields (series,xCoordinate,yCoordinate) in MainDataset ( used in chart)

List<List<Coordinates>> allchartData = new ArrayList<>();
List<Coordinates> chartData = new ArrayList<>();

chartData.add(new Coordinates(2.08, xCoordinate, yCoordinate));
chartData.add(new Coordinates(2.08, xCoordinate, yCoordinate));
chartData.add(new Coordinates(2.08, xCoordinate, yCoordinate));
allchartData.add(chartData);
.
.
.
chartData.add(new Coordinates(2.12, xCoordinate, yCoordinate));
chartData.add(new Coordinates(2.12, xCoordinate, yCoordinate));
chartData.add(new Coordinates(2.12, xCoordinate, yCoordinate));
allchartData.add(chartData);
.
.
.


for (int i = 0; i < baselineChartData.size(); i++) {
            parameters.put("XYChartDataSource", allchartData.get(i));
    }

main_report_book.jrxml 

<parameter name="XYChartDataSource" class="java.util.List"/>

        <part uuid="5e668430-9acd-4835-be21-f4e2902ce33d">
            <p:subreportPart xmlns:p="http://jasperreports.sourceforge.net/jasperreports/parts" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/parts http://jasperreports.sourceforge.net/xsd/parts.xsd">
                <subreportParameter name="REPORT_DATA_SOURCE">
                    <subreportParameterExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{XYChartDataSource})]]></subreportParameterExpression>
                </subreportParameter>
                <subreportExpression><![CDATA[$P{SUBREPORT_DIR}+"/sub_chart.jasper"]]></subreportExpression>
            </p:subreportPart>
        </part>

sub_chart.jrxml 

<parameter name="XYChartDataSource" class="java.util.List"/>
<field name="xCoordinate" class="java.lang.Double"/>
<field name="yCoordinate" class="java.lang.Double"/>
<field name="series" class="java.lang.Double"/>
    <summary>
        <band height="405">
            <xyLineChart>
                <chart evaluationTime="Report" bookmarkLevel="1">
                    <reportElement x="30" y="98" width="525" height="230" uuid="627d87d6-b675-409c-accb-b2bb3ffb9c80">
                        <property name="net.sf.jasperreports.chart.domain.axis.tick.interval" value="1"/>
                    </reportElement>
                    <chartTitle/>
                    <chartSubtitle/>
                    <chartLegend position="Right"/>
                </chart>
                <xyDataset>
                    <xySeries autoSort="true">
                        <seriesExpression><![CDATA[$F{series}]]></seriesExpression>
                        <xValueExpression><![CDATA[$F{xCoordinate}]]></xValueExpression>
                        <yValueExpression><![CDATA[$F{yCoordinate}]]></yValueExpression>

                    </xySeries>
                </xyDataset>
                <linePlot isShowShapes="false">
                    <plot/>
                    <categoryAxisFormat>
                        <axisFormat/>
                    </categoryAxisFormat>
                    <valueAxisFormat>
                        <axisFormat/>
                    </valueAxisFormat>
                </linePlot>
            </xyLineChart>






            </textField>
        </band>
    </summary>

当前输出：
仅打印一张图表，使用常规方法。

Current Output:only one chart is being printed, using the regular method.

预期输出：

这里我显示了两个图表（实际输出可能更多），需要从相同的报告模板生成报告：

Here I am showing two charts(could be more in actual output) , which needs to be generated from same report template in the SAME PDF REPORT:

推荐答案

你的问题在这里：

for (int i = 0; i < baselineChartData.size(); i++) {
        parameters.put("XYChartDataSource", allchartData.get(i));
}

您的参数XYChartDataSource将包含列表中的最后一个条目，每次循环时都会替换）

Your parameter "XYChartDataSource" will contain last entry in your List, you replace each time in loop see Map.put(K key,V value))

我们需要的是整个列表 

parameters.put("XYChartDataSource", allchartData);

但是现在我们无法直接访问列表<坐标>

However now we can't access directly the List<Coordinates>

在不更改当前子报表的解决方案是在中间插入另一个子报表，它将迭代 List< List<协调>> 详细信息区。

On solution to not change your current subreport is to insert another subreport in the middle which will iterate your List<List<Coordinates>> in detail band.

结构将


  1. 传递列表< List< Coordinates>> allchartData 作为此新子报表的数据源（sub_charts.jrxml）

  1. Pass List<List<Coordinates>> allchartData as datasource to this new subreport (sub_charts.jrxml)

定义字段 _THIS 在子报表中是列表<坐标> （因此它正在迭代您的列表<列表<坐标>> ）

Define the field _THIS which is List<Coordinates> in subreport (hence it's iterating your List<List<Coordinates>>)

详细信息包括当前的sub_chart.jrxml并传递 $ F {_THIS} 作为数据源

In detail band include current sub_chart.jrxml and pass $F{_THIS} as datasource

sub_charts.jrxml 

<?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="sub_charts" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="bc8c76ba-0b85-4522-bf67-4c62ae87202b">
    <field name="_THIS" class="java.util.List">
        <fieldDescription>_THIS</fieldDescription>
    </field>
    <detail>
        <band height="63" splitType="Stretch">
            <subreport>
                <reportElement x="0" y="0" width="550" height="60" uuid="b0e761bf-fe02-4a0a-bafb-32d6831b7a13"/>
                 <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{_THIS})]]></dataSourceExpression>
                 <subreportExpression><![CDATA[$P{SUBREPORT_DIR}+"/sub_chart.jasper"]]></subreportExpression>
            </subreport>
        </band>
    </detail>
</jasperReport>

请记住在 main_report_book.jrxml 中调用这个新的子报告。

Remember to call this new subreport in your main_report_book.jrxml.

<subreportExpression><![CDATA[$P{SUBREPORT_DIR}+"/sub_charts.jasper"]]></subreportExpression>

OP 为这个答案做了这个伟大的图形表示。

The OP Dhruvil Thaker did this great graphical representation of this answer.

这篇关于如何使用Jasperreports中的JRBeanCollectionDatasource创建相同类型但具有不同数据的多个图表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

09-02 19:34
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