以HTML格式导出JasperReports [英] Export JasperReports in HTML format

问题描述

以下代码获得 byte [] 结果，适用于PDF和XLSX。对于HTML，会引发异常。

  JasperPrint jasperPrint = JasperFillManager.fillReport（report，
 params，dataSource！= null？new JRMapArrayDataSource（
 dataSource）：new JREmptyDataSource（））; 
 
 ByteArrayOutputStream out = new ByteArrayOutputStream（）; 
 @SuppressWarnings（rawtypes）
出口商出口商; 
开关（格式）{
案例PDF：
 exporter = new JRPdfExporter（）; 
休息; 
 case XLSX：
 exporter = new JRXlsxExporter（）; 
休息; 
 case HTML：
 exporter = new HtmlExporter（）; 
休息; 
默认值：
抛出新的ReportException（未知的导出格式）; 
} 
 exporter.setExporterOutput（new SimpleOutputStreamExporterOutput（out））; 
 exporter.setExporterInput（new SimpleExporterInput（jasperPrint））; 
 exporter.exportReport（）; 
返回out.toByteArray（）; 
  

HTML的例外是 exporter.exportReport（）; 行表示

  java.lang.ClassCastException：
 
 net.sf.jasperreports .export.SimpleOutputStreamExporterOutput无法转换为net.sf.jasperreports.export.HtmlExporterOutput 
 at net.sf.jasperreports.engine.export.HtmlExporter.exportReport（HtmlExporter.java:232）
  

v6.0和v5.6的错误相同。这曾经在v5.0中工作（某些类在v5.6中已弃用）。

如何以各种格式导出报告，包括HTML？<对于HTML和其他格式：

  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（最终JasperPrint print）抛出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; 
休息; 
 
 case CSV：
 exporter = new JRCsvExporter（）; 
休息; 
 
 case XML：
 exporter = new JRXmlExporter（）; 
休息; 
 
案例XLSX：
 exporter = new JRXlsxExporter（）; 
休息; 
 
案例PDF：
 exporter = new JRPdfExporter（）; 
休息; 
 
默认值：
抛出新的JRException（未知报告格式：+ getReportFormat（）。toString（））; 
} 
 
 if（！html）{
 exporter.setExporterOutput（new SimpleOutputStreamExporterOutput（out））; 
} 
 
 exporter.setExporterInput（new SimpleExporterInput（print））; 
 exporter.exportReport（）; 
 
返回out.toByteArray（）; 
} 
  

使用以下方式调用：

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

The code below gets a byte[] result, which works for PDF and XLSX. For HTML, an exception is raised.

    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();

The exception for HTML is at exporter.exportReport(); line which says

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)

The error is the same for v6.0 and v5.6. This used to work in v5.0 (some of the classes were deprecated in v5.6).

How do you export a report in various formats, including HTML?

解决方案

For HTML and other formats:

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();
}

Call it using:

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

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