Question

我目前正在使用Jaspersoft Studio 6.3.0和jasperreports-6.2.0.jar从Java应用程序生成JasperReports的报告。

我必须使用JRBeanCollectionDataSource创建多个xy-line图表（不仅仅是一行）。

如果我只使用一个xy数据列表List<Coordinates>，它只包含一行的数据，那么我将得到正确的XY线图，但只有一行。但我需要在图表上绘制多条线，并且要绘制的线条数是动态的。

我希望有经验的JasperReports能够轻松解决它。我尝试使用JRBeanCollectionDataSource搜索多个xy-line图表，但他们都使用数据库查询进行相同的示例。

任何人都可以为jasper建议一些好的阅读材料，因为这只是我的开始，在后期我必须生成文档，使用jasper报告，我相信，我将不得不使用jasper提供的大部分功能（图表，表格，静态数据，目录等）。

Bean类：

public class Coordinates {

    public Coordinates(Number xCoordinate, Number yCoordinate) {
        super();
        this.xCoordinate = xCoordinate;
        this.yCoordinate = yCoordinate;
    }

    public Coordinates() {
    }

    private Number xCoordinate;
    private Number yCoordinate;

    public Number getxCoordinate() {
        return xCoordinate;
    }

    public void setxCoordinate(Number xCoordinate) {
        this.xCoordinate = xCoordinate;
    }

    public Number getyCoordinate() {
        return yCoordinate;
    }

    public void setyCoordinate(Number yCoordinate) {
        this.yCoordinate = yCoordinate;
    }

这是我创建报告的方式：我创建了

List<List<Coordinates>> coordinatesList = new ArrayList<>();

这样我就可以在其中保存多行数据。

 JRBeanCollectionDataSource coordiantesListBean = new JRBeanCollectionDataSource(coordinatesList); 

            ClassLoader classloader = Thread.currentThread().getContextClassLoader();
            InputStream projectInputStream = classloader.getResourceAsStream("jasper/xyLineChart.jasper");

            Map<String, Object> parameters = new HashMap<String, Object>();
            parameters.put("XYChartDataSource", coordiantesListBean);

            try {
                JasperPrint jasperPrint = JasperFillManager.fillReport(projectInputStream, parameters,
                        new JREmptyDataSource());
                JasperExportManager.exportReportToPdfFile(jasperPrint,FILE_LOCATION);
            } catch (JRException e) {
                e.printStackTrace();
            }

这是我的xyLineChart.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="test" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="f5d035d9-630a-476c-b3d1-32985d774cb3">
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
    <subDataset name="XYdataset" uuid="276f43e3-9d6c-4df1-85cb-5ea8bef1c28c">
        <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
        <parameter name="XYChartDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource">
            <parameterDescription><![CDATA[]]></parameterDescription>
        </parameter>
        <queryString>
            <![CDATA[]]>
        </queryString>
        <field name="xCoordinate" class="java.lang.Number"/>
        <field name="yCoordinate" class="java.lang.Number"/>
    </subDataset>
    <parameter name="XYChartDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
    <queryString>
        <![CDATA[]]>
    </queryString>
    <summary>
        <band height="283" splitType="Stretch">
            <xyLineChart>
                <chart evaluationTime="Report">
                    <reportElement x="0" y="0" width="555" height="283" uuid="9c9ff114-81b4-433f-bf71-17e21ea1fd3e"/>
                    <chartTitle/>
                    <chartSubtitle/>
                    <chartLegend/>
                </chart>
                <xyDataset>
                    <dataset>
                        <datasetRun subDataset="XYdataset" uuid="a8b4a706-dfaf-4347-9410-3c7018fce5f2">
                            <dataSourceExpression><![CDATA[$P{XYChartDataSource}]]></dataSourceExpression>
                        </datasetRun>
                    </dataset>
                    <xySeries autoSort="true">
                        <seriesExpression><![CDATA["SERIES 1"]]></seriesExpression>
                        <xValueExpression><![CDATA[$F{xCoordinate}]]></xValueExpression>
                        <yValueExpression><![CDATA[$F{yCoordinate}]]></yValueExpression>
                    </xySeries>
                </xyDataset>
                <linePlot>
                    <plot/>
                    <categoryAxisFormat>
                        <axisFormat/>
                    </categoryAxisFormat>
                    <valueAxisFormat>
                        <axisFormat/>
                    </valueAxisFormat>
                </linePlot>
            </xyLineChart>
        </band>
    </summary>
</jasperReport>

Answer 1

实际上，多行代表JasperReports中的多个系列。

为了解决这个问题，我为每个系列创建了一个单独的bean。我不确定这是否是最好的解决方案，但对我有用。

ClassLoader classloader = Thread.currentThread().getContextClassLoader();
        InputStream projectInputStream = classloader.getResourceAsStream("jasper/xyLineChart.jasper");


        Map<String, Object> parameters = new HashMap<String, Object>();

        for(int i = 0 ; i< coordinatesList.size() ; i++){
            coordiantesListBean = new JRBeanCollectionDataSource(coordinatesList.get(i));
            parameters.put("XYChartDataSource", coordiantesListBean);
        }

        try {
            JasperPrint jasperPrint = JasperFillManager.fillReport(projectInputStream, parameters,
                    new JREmptyDataSource());
            JasperExportManager.exportReportToPdfFile(jasperPrint,FILE_LOCATION);
        } catch (JRException e) {
            e.printStackTrace();
        }

我甚至在BEAN类中创建了一个额外的系列变量

public class Coordinates {



    public Coordinates() {
    }

    public Coordinates(Number series, Number xCoordinate, Number yCoordinate) {
        super();
        this.series = series;
        this.xCoordinate = xCoordinate;
        this.yCoordinate = yCoordinate;
    }

    private Number series;
    private Number xCoordinate;
    private Number yCoordinate;

    /** getters & setters **/

}

xyLineChart.jrxml

此处，我添加了新的系列变量
<![CDATA[$F{series}.doubleValue()]]>

<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.3.0.final using JasperReports Library version 6.3.0  -->
<!-- 2016-07-22T09:37:19 -->
<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="test" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="f5d035d9-630a-476c-b3d1-32985d774cb3">
    <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
    <subDataset name="XYdataset" uuid="276f43e3-9d6c-4df1-85cb-5ea8bef1c28c">
        <property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
        <parameter name="XYChartDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource">
            <parameterDescription><![CDATA[]]></parameterDescription>
        </parameter>
        <queryString>
            <![CDATA[]]>
        </queryString>
        <field name="xCoordinate" class="java.lang.Double"/>
        <field name="yCoordinate" class="java.lang.Double"/>
        <field name="series" class="java.lang.Double"/>
    </subDataset>
    <parameter name="XYChartDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
    <queryString>
        <![CDATA[]]>
    </queryString>
    <background>
        <band splitType="Stretch"/>
    </background>
    <summary>
        <band height="283" splitType="Stretch">
            <xyLineChart>
                <chart evaluationTime="Report">
                    <reportElement x="0" y="0" width="555" height="283" uuid="78aa19cc-8293-4bdd-b9af-5c429db047d2"/>
                    <chartTitle/>
                    <chartSubtitle/>
                    <chartLegend/>
                </chart>
                <xyDataset>
                    <dataset>
                        <datasetRun subDataset="XYdataset" uuid="d121d53d-5698-4914-953e-03df6bf2af6e">
                            <dataSourceExpression><![CDATA[$P{XYChartDataSource}]]></dataSourceExpression>
                        </datasetRun>
                    </dataset>
                    <xySeries autoSort="true">
                        <seriesExpression><![CDATA[$F{series}.doubleValue()]]></seriesExpression>
                        <xValueExpression><![CDATA[$F{xCoordinate}.doubleValue()]]></xValueExpression>
                        <yValueExpression><![CDATA[$F{yCoordinate}.doubleValue()]]></yValueExpression>
                    </xySeries>
                </xyDataset>
                <linePlot>
                    <plot/>
                    <categoryAxisFormat>
                        <axisFormat/>
                    </categoryAxisFormat>
                    <valueAxisFormat>
                        <axisFormat/>
                    </valueAxisFormat>
                </linePlot>
            </xyLineChart>
        </band>
    </summary>
</jasperReport>

输出：

JasperReports中单个图表中的多个XY线

1 个答案: