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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with JasperReports. If not, see .
*/
package net.sf.jasperreports.j2ee.servlets;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.export.JRXlsAbstractExporter;
import net.sf.jasperreports.engine.export.JRXlsExporterContext;
import net.sf.jasperreports.engine.util.FileBufferedOutputStream;
import net.sf.jasperreports.export.SimpleExporterInput;
import net.sf.jasperreports.export.SimpleOutputStreamExporterOutput;
import net.sf.jasperreports.export.SimpleXlsReportConfiguration;
import net.sf.jasperreports.export.XlsExporterConfiguration;
import net.sf.jasperreports.export.XlsReportConfiguration;
/**
* @author Ionut Nedelcu ([email protected])
*/
public abstract class AbstractXlsServlet extends BaseHttpServlet
{
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
@Override
public void service(
HttpServletRequest request,
HttpServletResponse response
) throws IOException, ServletException
{
List jasperPrintList = BaseHttpServlet.getJasperPrintList(request);
if (jasperPrintList == null)
{
throw new ServletException("No JasperPrint documents found on the HTTP session.");
}
Boolean isBuffered = Boolean.valueOf(request.getParameter(BaseHttpServlet.BUFFERED_OUTPUT_REQUEST_PARAMETER));
if (isBuffered)
{
FileBufferedOutputStream fbos = new FileBufferedOutputStream();
JRXlsAbstractExporter exporter = getXlsExporter();
exporter.setExporterInput(SimpleExporterInput.getInstance(jasperPrintList));
exporter.setExporterOutput(new SimpleOutputStreamExporterOutput(fbos));
SimpleXlsReportConfiguration configuration = new SimpleXlsReportConfiguration();
configuration.setOnePagePerSheet(false);
configuration.setWhitePageBackground(false);
exporter.setConfiguration(configuration);
try
{
exporter.exportReport();
fbos.close();
if (fbos.size()> 0)
{
response.setContentType(getResponseContentType());
setResponseHeader(response);
response.setContentLength(fbos.size());
ServletOutputStream outputStream = response.getOutputStream();
try
{
fbos.writeData(outputStream);
fbos.dispose();
outputStream.flush();
}
finally
{
if (outputStream != null)
{
try
{
outputStream.close();
}
catch (IOException ex)
{
}
}
}
}
}
catch (JRException e)
{
throw new ServletException(e);
}
finally
{
fbos.close();
fbos.dispose();
}
// else
// {
// response.setContentType("text/html");
// PrintWriter out = response.getWriter();
// out.println("");
// out.println("");
// out.println("Empty response.");
// out.println("");
// out.println("");
// }
}
else
{
response.setContentType(getResponseContentType());
setResponseHeader(response);
JRXlsAbstractExporter exporter = getXlsExporter();
exporter.setExporterInput(SimpleExporterInput.getInstance(jasperPrintList));
OutputStream outputStream = response.getOutputStream();
exporter.setExporterOutput(new SimpleOutputStreamExporterOutput(outputStream));
SimpleXlsReportConfiguration configuration = new SimpleXlsReportConfiguration();
configuration.setOnePagePerSheet(false);
configuration.setWhitePageBackground(false);
exporter.setConfiguration(configuration);
try
{
exporter.exportReport();
}
catch (JRException e)
{
throw new ServletException(e);
}
finally
{
if (outputStream != null)
{
try
{
outputStream.close();
}
catch (IOException ex)
{
}
}
}
}
}
/**
*
*/
protected abstract JRXlsAbstractExporter getXlsExporter();
protected String getResponseContentType(){
return "application/xls";
}
protected void setResponseHeader(HttpServletResponse response){
response.setHeader("Content-Disposition", "inline; filename=\"file.xls\"");
}
}