JasperReports连接

Question

I'm trying to export my dataTable, for that I'm using JasperReport, but it doesn't work. I got this error:

net.sf.jasperreports.engine.JRException: Error retrieving field value from bean

Can you help me please.

  <?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="null" language="groovy" pageWidth="842" pageHeight="595" orientation="Landscape" columnWidth="802" 
          leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" >
<style name="Title" fontName="Times New Roman" fontSize="50" isBold="true" pdfFontName="Times-Bold"/>
<style name="SubTitle" forecolor="#736343" fontName="Arial" fontSize="18"/>
<style name="Column header" forecolor="#666666" fontName="Arial" fontSize="12" isBold="true"/>
<style name="Detail" fontName="Arial" fontSize="12"/>
<style name="Row" mode="Transparent">
    <conditionalStyle>
        <conditionExpression><![CDATA[$V{REPORT_COUNT}%2 == 0]]></conditionExpression>
        <style backcolor="#E6DAC3"/>
    </conditionalStyle>
</style>
<queryString language="HQL">
    <![CDATA[SELECT
 article.`CODE_ARTICLE` AS article_CODE_ARTICLE,
 article.`DESIGNATIONAL` AS article_DESIGNATIONAL,
 article.`DESIGNATIONFR` AS article_DESIGNATIONFR
FROM
 `article` article]]>
</queryString>
<field name="article_CODE_ARTICLE" class="java.lang.String"/>
<field name="article_DESIGNATIONAL" class="java.lang.String"/>
<field name="article_DESIGNATIONFR" class="java.lang.String"/>
<background>
    <band splitType="Stretch"/>
</background>
<title>
    <band height="136" splitType="Stretch">

        <staticText>
            <reportElement style="Title" x="270" y="0" width="263" height="62"/>
            <textElement verticalAlignment="Middle">
                <font pdfFontName="Times-Roman"/>
            </textElement>
            <text><![CDATA[Articles]]></text>
        </staticText>



    </band>
</title>
<pageHeader>
    <band splitType="Stretch"/>
</pageHeader>
<columnHeader>
    <band height="16" splitType="Stretch">
        <line>
            <reportElement positionType="FixRelativeToBottom" x="0" y="15" width="802" height="1" />
            <graphicElement>
                <pen lineWidth="0.5" lineColor="#999999"/>
            </graphicElement>
        </line>
        <staticText>
            <reportElement style="Column header" x="0" y="0" width="267" height="15" forecolor="#736343" />
            <text><![CDATA[article_CODE_ARTICLE]]></text>
        </staticText>
        <staticText>
            <reportElement style="Column header" x="267" y="0" width="267" height="15" forecolor="#736343" />
            <text><![CDATA[article_DESIGNATIONAL]]></text>
        </staticText>
        <staticText>
            <reportElement style="Column header" x="534" y="0" width="267" height="15" forecolor="#736343" />
            <text><![CDATA[article_DESIGNATIONFR]]></text>
        </staticText>
    </band>
</columnHeader>
<detail>
    <band height="15" splitType="Stretch">
        <frame>
            <reportElement style="Row" mode="Opaque" x="0" y="0" width="802" height="15"/>
            <textField isStretchWithOverflow="true">
                <reportElement style="Detail" x="0" y="0" width="267" height="15"/>
                <textFieldExpression><![CDATA[$F{article_CODE_ARTICLE}]]></textFieldExpression>
            </textField>
            <textField isStretchWithOverflow="true">
                <reportElement style="Detail" x="267" y="0" width="267" height="15"/>
                <textFieldExpression><![CDATA[$F{article_DESIGNATIONAL}]]></textFieldExpression>
            </textField>
            <textField isStretchWithOverflow="true">
                <reportElement style="Detail" x="534" y="0" width="267" height="15"/>
                <textFieldExpression><![CDATA[$F{article_DESIGNATIONFR}]]></textFieldExpression>
            </textField>
        </frame>
    </band>
</detail>
<columnFooter>
    <band height="6" splitType="Stretch">
        <line>
            <reportElement positionType="FixRelativeToBottom" x="0" y="3" width="802" height="1" />
            <graphicElement>
                <pen lineWidth="0.5" lineColor="#999999"/>
            </graphicElement>
        </line>
    </band>
</columnFooter>
<pageFooter>
    <band height="25" splitType="Stretch">
        <frame>
            <reportElement mode="Opaque" x="-21" y="1" width="843" height="24" forecolor="#D0B48E" backcolor="#F2EBDF" />
            <textField evaluationTime="Report">
                <reportElement style="Column header" x="783" y="1" width="40" height="20" forecolor="#736343" />
                <textElement verticalAlignment="Middle">
                    <font size="10" isBold="false"/>
                </textElement>
                <textFieldExpression><![CDATA[" " + $V{PAGE_NUMBER}]]></textFieldExpression>
            </textField>
            <textField>
                <reportElement style="Column header" x="703" y="1" width="80" height="20" forecolor="#736343" />
                <textElement textAlignment="Right" verticalAlignment="Middle">
                    <font size="10" isBold="false"/>
                </textElement>
                <textFieldExpression><![CDATA["Page "+$V{PAGE_NUMBER}+" of"]]></textFieldExpression>
            </textField>
            <textField pattern="EEEEE dd MMMMM yyyy">
                <reportElement style="Column header" x="22" y="1" width="197" height="20" forecolor="#736343"/>
                <textElement verticalAlignment="Middle">
                    <font size="10" isBold="false"/>
                </textElement>
                <textFieldExpression><![CDATA[new java.util.Date()]]></textFieldExpression>
            </textField>
        </frame>
    </band>
</pageFooter>
<summary>
    <band splitType="Stretch"/>
</summary>

and this is my function:

 public void test(){
      JasperReport jasperReport;
JasperPrint jasperPrint;
try
{
  jasperReport = JasperCompileManager.compileReport(
      "C:/soprocess/ExportModel/report1.jrxml");
        JRBeanCollectionDataSource beanColDataSource =
  new JRBeanCollectionDataSource(articleDAO.findAll());
  jasperPrint = JasperFillManager.fillReport(
      jasperReport, new HashMap(),beanColDataSource);
  JasperExportManager.exportReportToPdfFile(
      jasperPrint, "C:/soprocess/ExportModel/simple_report.pdf");
}
catch (JRException e)
{
  e.printStackTrace();
}

Answer 1

The

net.sf.jasperreports.engine.JRException: Error retrieving field value from bean

Is thrown when jasper report can't access a public getter with the name of your field in the bean that you are passing as datasource.

You need to have in the bean passed by articleDAO.findAll() method's similar to

public String getArticle_CODE_ARTICLE(){//your code}
public String getArticle_DESIGNATIONAL(){//your code}
public String getArticle_DESIGNATIONFR(){//your code}

since you have these fields

<field name="article_CODE_ARTICLE" class="java.lang.String"/>
<field name="article_DESIGNATIONAL" class="java.lang.String"/>
<field name="article_DESIGNATIONFR" class="java.lang.String"/>

Note that:

<queryString language="HQL">
<![CDATA[SELECT
article.`CODE_ARTICLE` AS article_CODE_ARTICLE,
article.`DESIGNATIONAL` AS article_DESIGNATIONAL,
article.`DESIGNATIONFR` AS article_DESIGNATIONFR
FROM
 `article` article]]>
</queryString>

is not considered since you are passing a JRBeanCollectionDataSource , if you like it to be considered you need to pass the Hibernate Connection instead (along with other configurations for jasper report to understand your mapping) .