java - 在 iReports 和 Jasper 和 java bean 数据源中使用表格功能

Question

我现在花了 12 个小时的大部分时间试图弄清楚如何让图表和表格在 jasper 中工作。这篇文章是关于表格的(对于我的图表问题，这可能是同一个问题，see here)

我想使用 iReports 调色板中的表格工具制作一个包含两列的表格。我有一个 List(以前是一个 ArrayList，但我现在正在尝试一个 List，因为我看过的其中一个教程使用了它，而且它们没有问题) ProtoReport 数据对象列表中的 String。 ProtoReport List 是我包装在 JRBeanCollectionDataSource 中并传递给 JasperFill 的列表。我希望 tableData List 填充我的表的其中一列。当我根据我对 Jasper 的有限经验让我认为我应该设置它时，我收到以下错误:

net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file:
1. net.sf.jasperreports.engine.JRBeanCollectionDataSource cannot be resolved to a type
            value = new net.sf.jasperreports.engine.JRBeanCollectionDataSource(((java.util.List)field_tableData.getValue())); //$JR_EXPR_ID=12$
                        <---------------------------------------------------->
2. net.sf.jasperreports.engine.JRBeanCollectionDataSource cannot be resolved to a type
            value = new net.sf.jasperreports.engine.JRBeanCollectionDataSource(((java.util.List)field_tableData.getOldValue())); //$JR_EXPR_ID=12$
                        <---------------------------------------------------->
3. net.sf.jasperreports.engine.JRBeanCollectionDataSource cannot be resolved to a type
            value = new net.sf.jasperreports.engine.JRBeanCollectionDataSource(((java.util.List)field_tableData.getValue())); //$JR_EXPR_ID=12$
                        <---------------------------------------------------->
3 errors

at net.sf.jasperreports.engine.design.JRAbstractCompiler.compileReport(JRAbstractCompiler.java:204)
at net.sf.jasperreports.engine.JasperCompileManager.compile(JasperCompileManager.java:240)
at net.sf.jasperreports.engine.JasperCompileManager.compile(JasperCompileManager.java:173)
at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:448)
at org.reportprotojava.protosheet.Program.main(Program.java:134)

这是我的 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="ReportPrototype.jrxml" pageWidth="595" pageHeight="842" columnWidth="495" leftMargin="57" rightMargin="43" topMargin="43" bottomMargin="43" uuid="10825c57-f953-4166-bf03-8ecabe8a8f47">
<property name="ireport.zoom" value="0.75"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="128"/>
<style name="table">
    <box>
        <pen lineWidth="1.0" lineColor="#000000"/>
    </box>
</style>
<style name="table_TH" mode="Opaque" backcolor="#F0F8FF">
    <box>
        <topPen lineWidth="0.5" lineColor="#000000"/>
        <bottomPen lineWidth="0.5" lineColor="#000000"/>
    </box>
</style>
<style name="table_CH" mode="Opaque" backcolor="#BFE1FF">
    <box>
        <topPen lineWidth="0.5" lineColor="#000000"/>
        <bottomPen lineWidth="0.5" lineColor="#000000"/>
    </box>
</style>
<style name="table_TD" mode="Opaque" backcolor="#FFFFFF">
    <box>
        <topPen lineWidth="0.5" lineColor="#000000"/>
        <bottomPen lineWidth="0.5" lineColor="#000000"/>
    </box>
</style>
<style name="table 1">
    <box>
        <pen lineWidth="1.0" lineColor="#000000"/>
    </box>
</style>
<style name="table 1_TH" mode="Opaque" backcolor="#F0F8FF">
    <box>
        <pen lineWidth="0.5" lineColor="#000000"/>
    </box>
</style>
<style name="table 1_CH" mode="Opaque" backcolor="#BFE1FF">
    <box>
        <pen lineWidth="0.5" lineColor="#000000"/>
    </box>
</style>
<style name="table 1_TD" mode="Opaque" backcolor="#FFFFFF">
    <box>
        <pen lineWidth="0.5" lineColor="#000000"/>
    </box>
    <conditionalStyle>
        <conditionExpression><![CDATA[new Boolean($V{REPORT_COUNT}.intValue()%2==0)]]></conditionExpression>
        <style backcolor="#EFF7FF"/>
    </conditionalStyle>
</style>
<style name="table 2">
    <box>
        <pen lineWidth="1.0" lineColor="#000000"/>
    </box>
</style>
<style name="table 2_TH" mode="Opaque" backcolor="#F0F8FF">
    <box>
        <pen lineWidth="0.5" lineColor="#000000"/>
    </box>
</style>
<style name="table 2_CH" mode="Opaque" backcolor="#BFE1FF">
    <box>
        <pen lineWidth="0.5" lineColor="#000000"/>
    </box>
</style>
<style name="table 2_TD" mode="Opaque" backcolor="#FFFFFF">
    <box>
        <pen lineWidth="0.5" lineColor="#000000"/>
    </box>
    <conditionalStyle>
        <conditionExpression><![CDATA[new Boolean($V{REPORT_COUNT}.intValue()%2==0)]]></conditionExpression>
        <style backcolor="#EFF7FF"/>
    </conditionalStyle>
</style>
<subDataset name="ChartData" uuid="fc9ec0af-3e1a-40a7-8eb4-9ad30a266dee"/>
<subDataset name="Table Dataset 1" uuid="70531f85-19bf-4bd7-b801-6ed08b189b34">
    <field name="tableData" class="java.util.List"/>
</subDataset>
<queryString language="SQL">
    <![CDATA[]]>
</queryString>
<field name="title" class="java.lang.String"/>
<field name="logoLocation" class="java.lang.String"/>
<field name="picLocation" class="java.lang.String"/>
<field name="paragraphText" class="java.lang.String"/>
<field name="tableData" class="java.util.List"/>
<detail>
    <band height="756" splitType="Stretch">
        <textField isStretchWithOverflow="true" pattern="">
            <reportElement uuid="519c6bb5-72f9-4c25-8e91-47865ae0c9df" mode="Opaque" x="38" y="42" width="378" height="45" forecolor="#000099"/>
            <textElement textAlignment="Center" verticalAlignment="Middle" markup="html">
                <font size="26"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{title}]]></textFieldExpression>
        </textField>
        <image onErrorType="Icon">
            <reportElement uuid="3759a707-32a4-49ef-a9c6-b0ad7136f738" x="216" y="273" width="279" height="246"/>
            <imageExpression><![CDATA[$F{picLocation}]]></imageExpression>
        </image>
        <image onErrorType="Icon">
            <reportElement uuid="f989f871-32ea-4f13-ae3f-3f487cde76dd" x="295" y="0" width="200" height="42"/>
            <imageExpression><![CDATA[$F{logoLocation}]]></imageExpression>
        </image>
        <xyLineChart>
            <chart>
                <reportElement uuid="ae87fc13-b92e-4a2a-b218-d395343f6028" x="0" y="537" width="495" height="203"/>
                <chartTitle/>
                <chartSubtitle/>
                <chartLegend/>
            </chart>
            <xyDataset>
                <dataset>
                    <datasetRun subDataset="ChartData" uuid="de7fb84d-17ea-4e5e-82bf-2015e72e4982"/>
                </dataset>
            </xyDataset>
            <linePlot>
                <plot/>
            </linePlot>
        </xyLineChart>
        <textField>
            <reportElement uuid="565b981c-ca6f-4eab-ab3e-683b1e2b4d03" stretchType="RelativeToTallestObject" mode="Opaque" x="0" y="103" width="495" height="144" backcolor="#CCCCCC"/>
            <textElement markup="html">
                <font size="6"/>
            </textElement>
            <textFieldExpression><![CDATA[$F{paragraphText}]]></textFieldExpression>
        </textField>
        <componentElement>
            <reportElement uuid="8eb2d942-e4be-4b86-b409-9e1b91f6b4c4" key="table 2" style="table 2" x="13" y="273" width="180" height="246"/>
            <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="Table Dataset 1" uuid="40906b08-698d-4979-ae31-7f1689859954">
                    <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.JRBeanCollectionDataSource($F{tableData})]]></dataSourceExpression>
                </datasetRun>
                <jr:column uuid="f1282add-60a7-49d7-b66d-c8bd912dc161" width="90">
                    <jr:tableHeader style="table 2_TH" height="30"/>
                    <jr:detailCell style="table 2_TD" height="20">
                        <textField>
                            <reportElement uuid="5c95b1c4-bfb0-4364-83da-28d78e2d0555" x="0" y="0" width="90" height="20"/>
                            <textElement/>
                            <textFieldExpression><![CDATA[""+$F{tableData}]]></textFieldExpression>
                        </textField>
                    </jr:detailCell>
                </jr:column>
                <jr:column uuid="ec2f8c0c-e950-4b74-9d1e-851f68deedf3" width="90">
                    <jr:tableHeader style="table 2_TH" height="30"/>
                    <jr:detailCell style="table 2_TD" height="20"/>
                </jr:column>
            </jr:table>
        </componentElement>
    </band>
</detail>

这是我的 ProtoReport 类的初学者(getters、setters 等截断):

public class ProtoReport {


private String outputFileName;
private String title;
private String logoLocation;
private String paragraphText;
private List<String> tableData;
private String picLocation;
private int[][] graphData;  //TODO decide how to store chart data
private ChartData chartData;
private String path;




//default constructor
public ProtoReport() {

    // Initialize object fields
    outputFileName = "PrototypeReport";
    title = "Prototype Report";
    paragraphText = "Default text";

    tableData = null;
    chartData = new ChartData();

    //set path to working directory
    path = System.getProperty("user.dir");

    //default to assumed report location 
    //(ie same folder as .jrxml and .jasper files)
    logoLocation = path + "\\reports\\logo.jpg";
    picLocation = path + "\\reports\\pic.jpg";

}

//constructor
public ProtoReport(String title, String logoLocation, 
                        String picLocation, ChartData chartData) {

        // Initialize object fields
        outputFileName = "PrototypeReport";
        this.title = title;
        paragraphText = "Default text";

        //tableData = new ArrayList<String>();
        tableData = null;
        this.chartData = chartData;

        //set path to working directory
        path = System.getProperty("user.dir");

        //picture locations
        this.logoLocation = logoLocation;
        this.picLocation = picLocation;

    }



//Getters and Setters

//Self referencing method for use in iReport field description
    public ProtoReport getMe()
     {
      return this;
     }

最后，我的 Main 的相关部分:

public static void main(String[] args) {

    List<ProtoReport> listOfReports = new ArrayList<ProtoReport>();

    ProtoReport protoReport1 = new ProtoReport();
    ProtoReport protoReport2 = new ProtoReport();

//test table.. since nothing else will work...
    List<String> testTable = new ArrayList<String>();
    testTable.add("First entry test");
    testTable.add("Second entry test");
    protoReport1.setTableData(testTable);

    protoReport1.getTableData().add("First entry");
    protoReport1.getTableData().add("Second entry");
 listOfReports.add(protoReport1);

//and wrap the ArrayList in a JRBeanCollectionDataSource
    JRBeanCollectionDataSource beanBurritoWrap = new JRBeanCollectionDataSource(listOfReports);

    //build the jasper report
    JasperReport jasperReport;
    JasperPrint jasperPrint;
    HashMap<String, Object> hashMap = new HashMap<>();
    boolean reportCreated;

    try {

        jasperReport = JasperCompileManager.compileReport(jrxmlLocation);
        jasperPrint = JasperFillManager.fillReport(jasperReport, hashMap, beanBurritoWrap);
        JasperExportManager.exportReportToPdfFile(jasperPrint, outputFileName);
        reportCreated=true;
    }
    catch (JRException e) {
          e.printStackTrace();
          reportCreated=false;
    }

由于这与我的图表所遇到的问题类似，我怀疑它们的原因相同。我一直在尽我所能阅读有关如何使用这些功能的所有内容，但有些内容就是无法点击……如何在 iReport 中设置连接以使用 tableData 中的字符串填充我的表格？我是否需要每列的字符串列表，或者是否有更聪明的方法来完成所有这些(请记住，我想用 POJO 来完成这一切，即没有 sql 数据库)。

Answer 1

你在jrxml中提到的包名是错误的。是net.sf.jasperreports.engine.data.JRBeanCollectionDataSource .