Generating a text file with jasperReporting - jasper-reports

Question

this is my code java to generate a txt file with jasper :
package sms;
import module.User_Excel;
import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.engine.export.JRTextExporter;
import net.sf.jasperreports.engine.export.JRTextExporterParameter;
import net.sf.jasperreports.export.Exporter;
import net.sf.jasperreports.export.SimpleExporterInput;
import net.sf.jasperreports.export.SimpleTextReportConfiguration;
import net.sf.jasperreports.export.SimpleWriterExporterOutput;
import org.springframework.util.ResourceUtils;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class Main_txt {
public static void main(String[] args) throws Exception {
System.out.println( "generating jasper text file [.txt]" );
// Define the parameter for the user name
Map<String, Object> params = new HashMap<String, Object>();
params.put("userName", "salma");
// Compile the JasperReport template
File template = ResourceUtils.getFile("classpath:template_txt.jrxml");
JasperReport report = JasperCompileManager.compileReport(template.getAbsolutePath());
// Fill the JasperPrint object
JasperPrint print = JasperFillManager.fillReport(report, params, new JREmptyDataSource());
// Export the JasperPrint to a text file
Exporter exporter = new JRTextExporter();
exporter.setExporterInput(new SimpleExporterInput(print));
exporter.setExporterOutput(new SimpleWriterExporterOutput("output.txt"));
SimpleTextReportConfiguration configuration = new SimpleTextReportConfiguration();
configuration.setPageWidthInChars(80); // Set the page width to 80 characters
configuration.setCharWidth((float)8); // Set the character width to 8 pixels
exporter.setConfiguration(configuration);
exporter.exportReport();
System.out.println("Report generated successfully!");
}
public static JRDataSource getDataBeanList() {
List<User_Excel> users = new ArrayList<User_Excel>();
users.add(new User_Excel("salma abou", 22, "salma.abou#email.com"));
users.add(new User_Excel("Jane Doe", 25, "jane.doe#email.com"));
return new JRBeanCollectionDataSource(users);
}
private static JasperReport getJasperReport() throws FileNotFoundException, JRException {
File template = ResourceUtils.getFile("classpath:template_txt.jrxml");
return JasperCompileManager.compileReport(template.getAbsolutePath());
}
private static Map<String, Object> getParameters(){
String userName = "salma aboumzrag";
Map<String, Object> parameters = new HashMap<>();
parameters.put("createdBy", "salma");
parameters.put("userName", userName);
return parameters;
}
}
and here is my template :
<?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="HelloUser" pageWidth="595" pageHeight="842" whenNoDataType="AllSectionsNoDetail" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
<parameter name="userName" class="java.lang.String"/>
<title>
<band height="79">
<textField>
<reportElement x="0" y="0" width="100" height="30"/>
<textElement textAlignment="Center" verticalAlignment="Middle">
<font size="24"/>
</textElement>
<textFieldExpression><![CDATA["Hey, " + $P{userName}]]></textFieldExpression>
</textField>
</band>
</title>
</jasperReport>
i need to generate a text file saying Hello {user_name}
Igot ths error :
Exception in thread "main" net.sf.jasperreports.engine.JRRuntimeException: Character height in pixels or page height in characters must be specified and must be greater than zero.
at net.sf.jasperreports.engine.export.JRTextExporter.initReport(JRTextExporter.java:301)
at net.sf.jasperreports.engine.JRAbstractExporter.setCurrentExporterInputItem(JRAbstractExporter.java:616)
at net.sf.jasperreports.engine.export.JRTextExporter.exportReportToWriter(JRTextExporter.java:328)
at net.sf.jasperreports.engine.export.JRTextExporter.exportReport(JRTextExporter.java:206)
at sms.Main_txt.main(Main_txt.java:50)

Answer 1

i have to remove the font size="24" from my template because it- is not compatible with my config