我正在尝试将 Pentaho 生成的报告与 Java 应用程序集成。我的报告基于 OLAP 数据并使用 MDX 查询编写。我在其中一个博客上找到了一个示例并将其用作基础。我的代码是:
package org.pentaho.reporting.engine.classic.samples;
import in.nic.spaconsole.ServletContextProvider;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Map;
import java.util.HashMap;
import org.pentaho.reporting.engine.classic.core.DataFactory;
import org.pentaho.reporting.engine.classic.core.MasterReport;
import org.pentaho.reporting.engine.classic.core.ReportProcessingException;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
/**
* Generates a report in the following scenario:
* <ol>
* <li>The report definition file is a .prpt file which will be loaded and parsed
* <li>The data factory is a simple JDBC data factory using HSQLDB
* <li>There are no runtime report parameters used
* </ol>
*/
public class Sample1 extends AbstractReportGenerator
{
/**
* Default constructor for this sample report generator
*/
public Sample1()
{
}
/**
* Returns the report definition which will be used to generate the report. In this case, the report will be
* loaded and parsed from a file contained in this package.
*
* @return the loaded and parsed report definition to be used in report generation.
*/
public MasterReport getReportDefinition(String reportPath)
{
ResourceManager manager = new ResourceManager();
manager.registerDefaults();
try {
Resource res = manager.createDirectly(new URL(reportPath),
MasterReport.class);
MasterReport report = (MasterReport) res.getResource();
return report;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* Returns the data factory which will be used to generate the data used during report generation. In this example,
* we will return null since the data factory has been defined in the report definition.
*
* @return the data factory used with the report generator
*/
public DataFactory getDataFactory()
{
return null;
}
/**
* Returns the set of runtime report parameters. This sample report uses the following three parameters:
* <ul>
* <li><b>Report Title</b> - The title text on the top of the report</li>
* <li><b>Customer Names</b> - an array of customer names to show in the report</li>
* <li><b>Col Headers BG Color</b> - the background color for the column headers</li>
* </ul>
*
* @return <code>null</code> indicating the report generator does not use any report parameters
*/
public Map<String, Object> getReportParameters()
{
final Map parameters = new HashMap<String, Object>();
parameters.put("stday", 28);
parameters.put("styear", 2012);
parameters.put("stmonth", 10);
parameters.put("eday", 28);
parameters.put("eyear", 2012);
parameters.put("emonth", 10);
parameters.put("Sitesearch","india.gov.in");
parameters.put("firstResult",1);
parameters.put("lastResult", 100);
parameters.put("Pagenumber",1);
return parameters;
}
/**
* Simple command line application that will generate a PDF version of the report. In this report,
* the report definition has already been created with the Pentaho Report Designer application and
* it located in the same package as this class. The data query is located in that report definition
* as well, and there are a few report-modifying parameters that will be passed to the engine at runtime.
* <p/>
* The output of this report will be a PDF file located in the current directory and will be named
* <code>SimpleReportGeneratorExample.pdf</code>.
*
* @param args none
* @throws IOException indicates an error writing to the filesystem
* @throws ReportProcessingException indicates an error generating the report
*/
public static void main(String[] args) throws IOException, ReportProcessingException
{
final File outputFilenamehtml = new File(Sample1.class.getSimpleName() + ".html");
final File outputFilenamepdf = new File(Sample1.class.getSimpleName() + ".pdf");
// Generate the report
// new Sample1().generateReport(AbstractReportGenerator.OutputType.PDF, outputFilenamepdf);
// System.err.println("Generated the report [" + outputFilenamepdf.getAbsolutePath() + "]");
// new Sample1().generateReport(AbstractReportGenerator.OutputType.HTML, outputFilenamehtml);
// Output the location of the file
//System.err.println("Generated the report111 [" + outputFilenamehtml.getAbsolutePath() + "]");
}
public void report(String Path) throws IllegalArgumentException, ReportProcessingException, IOException {
// TODO Auto-generated method stub
// final File outputFilenamehtml = new File(Sample1.class.getSimpleName() + ".html");
final File outputFilenamepdf = new File(Sample1.class.getSimpleName() + ".pdf");
// Generate the report
new Sample1().generateReport(AbstractReportGenerator.OutputType.PDF, outputFilenamepdf,Path);
System.err.println("Generated the report [" + outputFilenamepdf.getAbsolutePath() + "]");
// new Sample1().generateReport(AbstractReportGenerator.OutputType.HTML, outputFilenamehtml,Path);
// Output the location of the file
// System.err.println("Generated the report111 [" + outputFilenamehtml.getAbsolutePath() + "]");
}
}
Abstractreportgenerator.java
/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2009 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.samples;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import org.pentaho.reporting.engine.classic.core.ClassicEngineBoot;
import org.pentaho.reporting.engine.classic.core.DataFactory;
import org.pentaho.reporting.engine.classic.core.MasterReport;
import org.pentaho.reporting.engine.classic.core.ReportProcessingException;
import org.pentaho.reporting.engine.classic.core.layout.output.AbstractReportProcessor;
import org.pentaho.reporting.engine.classic.core.modules.output.pageable.base.PageableReportProcessor;
import org.pentaho.reporting.engine.classic.core.modules.output.pageable.pdf.PdfOutputProcessor;
import org.pentaho.reporting.engine.classic.core.modules.output.table.base.FlowReportProcessor;
import org.pentaho.reporting.engine.classic.core.modules.output.table.base.StreamReportProcessor;
import org.pentaho.reporting.engine.classic.core.modules.output.table.html.AllItemsHtmlPrinter;
import org.pentaho.reporting.engine.classic.core.modules.output.table.html.FileSystemURLRewriter;
import org.pentaho.reporting.engine.classic.core.modules.output.table.html.HtmlOutputProcessor;
import org.pentaho.reporting.engine.classic.core.modules.output.table.html.HtmlPrinter;
import org.pentaho.reporting.engine.classic.core.modules.output.table.html.StreamHtmlOutputProcessor;
import org.pentaho.reporting.engine.classic.core.modules.output.table.xls.FlowExcelOutputProcessor;
import org.pentaho.reporting.libraries.repository.ContentLocation;
import org.pentaho.reporting.libraries.repository.DefaultNameGenerator;
import org.pentaho.reporting.libraries.repository.stream.StreamRepository;
/**
* This is the base class used with the report generation examples. It contains the actual <code>embedding</code>
* of the reporting engine and report generation. All example embedded implementations will need to extend this class
* and perform the following:
* <ol>
* <li>Implement the <code>getReportDefinition()</code> method and return the report definition (how the report
* definition is generated is up to the implementing class).
* <li>Implement the <code>getTableDataFactory()</code> method and return the data factory to be used (how
* this is created is up to the implementing class).
* <li>Implement the <code>getReportParameters()</code> method and return the set of report parameters to be used.
* If no report parameters are required, then this method can simply return <code>null</code>
* </ol>
*/
public abstract class AbstractReportGenerator
{
/**
* The supported output types for this sample
*/
public static enum OutputType
{
PDF, EXCEL, HTML
}
/**
* Performs the basic initialization required to generate a report
*/
public AbstractReportGenerator()
{
// Initialize the reporting engine
ClassicEngineBoot.getInstance().start();
}
/**
* Returns the report definition used by this report generator. If this method returns <code>null</code>,
* the report generation process will throw a <code>NullPointerException</code>.
*
* @return the report definition used by thus report generator
*/
public abstract MasterReport getReportDefinition(String Path);
/**
* Returns the data factory used by this report generator. If this method returns <code>null</code>,
* the report generation process will use the data factory used in the report definition.
*
* @return the data factory used by this report generator
*/
public abstract DataFactory getDataFactory();
/**
* Returns the set of parameters that will be passed to the report generation process. If there are no parameters
* required for report generation, this method may return either an empty or a <code>null</code> <code>Map</code>
*
* @return the set of report parameters to be used by the report generation process, or <code>null</code> if no
* parameters are required.
*/
public abstract Map<String, Object> getReportParameters();
/**
* Generates the report in the specified <code>outputType</code> and writes it into the specified
* <code>outputFile</code>.
*
* @param outputType the output type of the report (HTML, PDF, HTML)
* @param outputStream2 the file into which the report will be written
* @throws IllegalArgumentException indicates the required parameters were not provided
* @throws IOException indicates an error opening the file for writing
* @throws ReportProcessingException indicates an error generating the report
*/
public void generateReport(final OutputType outputType,File outputFile,String Path)
throws IllegalArgumentException, IOException, ReportProcessingException
{
if (outputFile == null)
{
throw new IllegalArgumentException("The output file was not specified");
}
OutputStream outputStream = null;
try
{
// Open the output stream
outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));
// Generate the report to this output stream
generateReport(outputType, outputStream,Path);
}
finally
{
if (outputStream != null)
{
outputStream.close();
}
}
}
/**
* Generates the report in the specified <code>outputType</code> and writes it into the specified
* <code>outputStream</code>.
* <p/>
* It is the responsibility of the caller to close the <code>outputStream</code>
* after this method is executed.
*
* @param outputType the output type of the report (HTML, PDF, HTML)
* @param outputStream the stream into which the report will be written
* @throws IllegalArgumentException indicates the required parameters were not provided
* @throws ReportProcessingException indicates an error generating the report
*/
public void generateReport(final OutputType outputType, OutputStream outputStream,String Path)
throws IllegalArgumentException, ReportProcessingException
{
if (outputStream == null)
{
throw new IllegalArgumentException("The output stream was not specified");
}
// Get the report and data factory
final MasterReport report = getReportDefinition(Path);
final DataFactory dataFactory = getDataFactory();
// Set the data factory for the report
if (dataFactory != null)
{
report.setDataFactory(dataFactory);
}
// Add any parameters to the report
final Map<String, Object> reportParameters = getReportParameters();
if (null != reportParameters)
{
for (String key : reportParameters.keySet())
{
report.getParameterValues().put(key, reportParameters.get(key));
}
}
// Prepare to generate the report
AbstractReportProcessor reportProcessor = null;
try
{
// Greate the report processor for the specified output type
switch (outputType)
{
case PDF:
{
final PdfOutputProcessor outputProcessor =
new PdfOutputProcessor(report.getConfiguration(), outputStream, report.getResourceManager());
reportProcessor = new PageableReportProcessor(report, outputProcessor);
break;
}
case EXCEL:
{
final FlowExcelOutputProcessor target =
new FlowExcelOutputProcessor(report.getConfiguration(), outputStream, report.getResourceManager());
reportProcessor = new FlowReportProcessor(report, target);
break;
}
case HTML:
{
final StreamRepository targetRepository = new StreamRepository(outputStream);
final ContentLocation targetRoot = targetRepository.getRoot();
final HtmlOutputProcessor outputProcessor = new StreamHtmlOutputProcessor(report.getConfiguration());
final HtmlPrinter printer = new AllItemsHtmlPrinter(report.getResourceManager());
printer.setContentWriter(targetRoot, new DefaultNameGenerator(targetRoot, "index", "html"));
printer.setDataWriter(null, null);
printer.setUrlRewriter(new FileSystemURLRewriter());
outputProcessor.setPrinter(printer);
reportProcessor = new StreamReportProcessor(report, outputProcessor);
break;
}
}
// Generate the report
reportProcessor.processReport();
}
finally
{
if (reportProcessor != null)
{
reportProcessor.close();
}
}
}
}
and I have a controller that ivokes this sample1.java
@POST
@Path("/get/reportDisplay")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.TEXT_HTML)
public Response exportReport(final ReportBean reportBean,
@Context final HttpServletRequest request,
@Context final HttpServletResponse response,
@Context final ServletContext context) throws IOException,
ParseException, InstantiationException, IllegalAccessException,
ClassNotFoundException, SQLException, JRException, IllegalArgumentException,ReportProcessingException {
String reportPath ="file://" +context.getRealPath("anor_admin.prpt");
Sample1 sample=new Sample1();
sample.report(reportPath);
return Response.status(200).build();
}
//End of Methods
} //End of class
但我收到错误并且无法预览我的报告。请帮我解决这个问题。
最佳答案
我已成功将报表引擎嵌入到 Web 应用程序中，但我必须修复一些类路径错误才能使其正常工作。
确保您的 war 包含来自pentaho-library的report-engine-classic.core.jar和lib*.jar。 如果您使用图表，则需要额外的依赖项。
您遇到了什么类型的错误？
关于java - 将 Pentaho Reporting 与 Java Web 应用程序集成，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19832851/