Экспорт JasperReports в формате HTML

Question

Код ниже получает результат byte[], который работает для PDF и XLSX. Для HTML создается исключение.

JasperPrint jasperPrint = JasperFillManager.fillReport(report, 
      params, dataSource != null ? new JRMapArrayDataSource(
        dataSource) : new JREmptyDataSource()); 

    ByteArrayOutputStream out = new ByteArrayOutputStream(); 
    @SuppressWarnings("rawtypes") 
    Exporter exporter; 
    switch (format) { 
    case PDF: 
     exporter = new JRPdfExporter(); 
     break; 
    case XLSX: 
     exporter = new JRXlsxExporter(); 
     break; 
    case HTML: 
     exporter = new HtmlExporter(); 
     break; 
    default: 
     throw new ReportException("Unknown export format"); 
    } 
    exporter.setExporterOutput(new SimpleOutputStreamExporterOutput(out)); 
    exporter.setExporterInput(new SimpleExporterInput(jasperPrint)); 
    exporter.exportReport(); 
    return out.toByteArray(); 

Исключение для HTML находится в exporter.exportReport(); линии, которая говорит

java.lang.ClassCastException: 

net.sf.jasperreports.export.SimpleOutputStreamExporterOutput cannot be cast to net.sf.jasperreports.export.HtmlExporterOutput 
at net.sf.jasperreports.engine.export.HtmlExporter.exportReport(HtmlExporter.java:232) 

ошибка одинакова для v6.0 и версии 5.6. Это использовалось для работы в версии 5.0 (некоторые из классов устарели в версии 5.6).

Как вы экспортируете отчет в различных форматах, включая HTML?

Answer 1

Для HTML и другие форматы:

import net.sf.jasperreports.engine.JRDataSource; 
import net.sf.jasperreports.engine.JRException; 
import net.sf.jasperreports.engine.JasperFillManager; 
import net.sf.jasperreports.engine.JasperPrint; 
import net.sf.jasperreports.engine.export.HtmlExporter; 
import net.sf.jasperreports.engine.export.JRCsvExporter; 
import net.sf.jasperreports.engine.export.JRPdfExporter; 
import net.sf.jasperreports.engine.export.JRXmlExporter; 
import net.sf.jasperreports.export.Exporter; 
import net.sf.jasperreports.export.SimpleExporterInput; 
import net.sf.jasperreports.export.SimpleHtmlExporterOutput; 
import net.sf.jasperreports.export.SimpleOutputStreamExporterOutput; 

public byte[] export(final JasperPrint print) throws JRException { 
    final Exporter exporter; 
    final ByteArrayOutputStream out = new ByteArrayOutputStream(); 
    boolean html = false; 

    switch (getReportFormat()) { 
     case HTML: 
      exporter = new HtmlExporter(); 
      exporter.setExporterOutput(new SimpleHtmlExporterOutput(out)); 
      html = true; 
      break; 

     case CSV: 
      exporter = new JRCsvExporter(); 
      break; 

     case XML: 
      exporter = new JRXmlExporter(); 
      break; 

     case XLSX: 
      exporter = new JRXlsxExporter(); 
      break; 

     case PDF: 
      exporter = new JRPdfExporter(); 
      break; 

     default: 
      throw new JRException("Unknown report format: " + getReportFormat().toString()); 
    } 

    if (!html) { 
     exporter.setExporterOutput(new SimpleOutputStreamExporterOutput(out)); 
    } 

    exporter.setExporterInput(new SimpleExporterInput(print)); 
    exporter.exportReport(); 

    return out.toByteArray(); 
} 

вызова его с помощью:

JasperPrint print = JasperFillManager.fillReport(report, parameters, dataSource); 
byte report[] = export(print); 

Answer 2

Попробуйте это динамическое выполнение отчета

JasperPrint jasperPrint = JasperFillManager.fillReport(report, 
      params, dataSource != null ? new JRMapArrayDataSource(
        dataSource) : new JREmptyDataSource()); 

     ByteArrayOutputStream out = new ByteArrayOutputStream(); 

     @SuppressWarnings("rawtypes") 
     Exporter exporter; 
     switch (format) { 
     case PDF: 
      exporter = new JRPdfExporter(); 
      exporter.setExporterOutput(new SimpleWriterExporterOutput(out)); 
      break; 
     case CSV: 
      exporter = new JRCsvExporter(); 
      exporter.setExporterOutput(new SimpleWriterExporterOutput(out)); 
      break; 
     case XLSX: 
      exporter = new JRXlsxExporter(); 
      exporter.setExporterOutput(new SimpleWriterExporterOutput(out)); 
      break; 
     case HTML: 
      exporter = new HtmlExporter(); 
      exporter.setExporterOutput(new SimpleWriterExporterOutput(out)); 
      break; 
     default: 
      throw new ReportException("Unknown export format"); 
     } 
     exporter.setExporterInput(new SimpleExporterInput(jasperPrint)); 
     exporter.exportReport(); 

Answer 3

для всех типов формата

Maven depeendecies быть включены как ниже

<!-- dynamic/jasper reports --> 
    <dependency> 
     <groupId>net.sourceforge.dynamicreports</groupId> 
     <artifactId>dynamicreports-core</artifactId> 
     <version>4.1.0</version> 
    </dependency> 
    <dependency> 
     <groupId>org.eclipse.birt.runtime.3_7_1</groupId> 
     <artifactId>com.lowagie.text</artifactId> 
     <version>2.1.7</version> 
    </dependency> 

XHTML Код:

<h:commandLink id="csv" onclick="PF('data').hide();" 
    action="#{dashboardInfoBean.downloadCsv}"> 
    <h:graphicImage name="images/img_trans.gif" 
     styleClass="ico csvImg" /> 
</h:commandLink> 
<h:commandLink id="pdf" onclick="PF('data').hide();" 
    action="#{dashboardInfoBean.downloadPdf}"> 
    <h:graphicImage name="images/img_trans.gif" 
     styleClass="ico pdfImg" /> 
</h:commandLink> 
<h:commandLink id="excel" onclick="PF('data').hide();" 
    action="#{dashboardInfoBean.downloadExcel}"> 
    <h:graphicImage name="images/img_trans.gif" 
     styleClass="ico xlsImg" /> 
</h:commandLink> 
<h:commandLink id="xml" onclick="PF('data').hide();" 
    action="#{dashboardInfoBean.downloadXml}"> 
    <h:graphicImage name="images/img_trans.gif" 
     styleClass="ico xmlImg" /> 
</h:commandLink> 
<h:commandLink id="jasper" onclick="PF('data').hide();" 
    action="#{dashboardInfoBean.downloadJasperReport}"> 
    <h:graphicImage name="images/img_trans.gif" 
     styleClass="ico xmlImg" /> 
</h:commandLink>   

Java код:

//set datasource for creating the report 
     report.setDataSource(dataSource); 
     JasperPrint jasperPrint = report.toJasperPrint(); 
     HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse(); 
     ServletOutputStream servletOutputStream = response.getOutputStream(); 

     if(downloadFormat.equalsIgnoreCase("PDF")){ 
      response.setContentType("application/pdf"); 
      response.addHeader("Content-disposition", "attachment; filename=report.pdf"); 
      JasperExportManager.exportReportToPdfStream(jasperPrint, servletOutputStream); 
     } else if(downloadFormat.equalsIgnoreCase("XML")){ 
      //response.setContentType("application/pdf"); 
      response.addHeader("Content-disposition", "attachment; filename=report.xml"); 
      JasperExportManager.exportReportToXmlStream(jasperPrint, servletOutputStream); 
     } else if(downloadFormat.equalsIgnoreCase("CSV")){ 
      response.setContentType("text/plain"); 
      response.addHeader("Content-disposition", "attachment; filename=report.csv"); 
      JRCsvExporter exporter = new JRCsvExporter(); 
      exporter.setParameter(JRCsvExporterParameter.JASPER_PRINT, 
        jasperPrint); 
      exporter.setParameter(JRCsvExporterParameter.OUTPUT_STREAM, 
        servletOutputStream); 
      exporter.setParameter(JRExporterParameter.IGNORE_PAGE_MARGINS, 
        Boolean.TRUE); 
      exporter.exportReport(); 
     } else if(downloadFormat.equalsIgnoreCase("XLS")){ 
      response.setContentType("application/vnd.ms-excel"); 
      response.addHeader("Content-disposition", "attachment; filename=report.xls"); 
      JExcelApiExporter exporterXLS = new JExcelApiExporter(); 
      exporterXLS.setParameter( 
       JRXlsExporterParameter.JASPER_PRINT, 
       jasperPrint); 
      exporterXLS.setParameter( 
       JRXlsExporterParameter.IS_DETECT_CELL_TYPE, 
       Boolean.TRUE); 
      exporterXLS.setParameter( 
       JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND, 
       Boolean.FALSE); 
      exporterXLS.setParameter( 
       JRXlsExporterParameter.IS_REMOVE_EMPTY_SPACE_BETWEEN_ROWS, 
       Boolean.TRUE); 
      exporterXLS.setParameter( 
       JRXlsExporterParameter 
        .IS_REMOVE_EMPTY_SPACE_BETWEEN_COLUMNS, 
       Boolean.TRUE); 
      // exporterXLS.setParameter( 
      // JRXlsExporterParameter.IS_IGNORE_CELL_BORDER, 
      // Boolean.TRUE); 
      exporterXLS.setParameter(JRXlsExporterParameter.OUTPUT_STREAM, 
        servletOutputStream); 
      exporterXLS.exportReport(); 
     } 
     FacesContext.getCurrentInstance().responseComplete();