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摘要: 在servlet中使用jfreereport直接产生pdf文件报表
//- GenPDFByJfreereportTemplateServlet.java
package acme.web.servlets;
import java.io.IOException;
import java.net.URL;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jfree.report.Boot;
import org.jfree.report.JFreeReport;
import org.jfree.report.demo.SwingIconsDemoTableModel;
import org.jfree.report.modules.output.pageable.base.PageableReportProcessor;
import org.jfree.report.modules.output.pageable.pdf.PDFOutputTarget;
import org.jfree.report.modules.parser.base.ReportGenerator;
import org.jfree.report.util.Log;
import org.jfree.report.util.ReportConfiguration;
import org.jfree.xml.ElementDefinitionException;
/**
* @version 1.0
* @author Lee S
*/
public class GenPDFByJfreereportTemplateServlet extends HttpServlet implements Servlet
{
/**
* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
resp.setContentType("application/pdf");
ServletOutputStream out = resp.getOutputStream();
try
{
// initialize JFreeReport
Boot.start();
ReportConfiguration.getGlobalConfig().setLogLevel("Error");
// update the log system to use the new settings ...
Log.getJFreeReportLog().init();
final URL in =
getClass().getResource("/acme/web/resources/swing-icons.xml");
if (in == null)
{
throw new Exception("swing-icons.xml can't be found.");
}
final JFreeReport report = parseReport(in);
report.setData(new SwingIconsDemoTableModel());
PDFOutputTarget target =
new PDFOutputTarget(out, report.getDefaultPageFormat());
target.configure(report.getReportConfiguration());
target.open();
PageableReportProcessor proc = new PageableReportProcessor(report);
proc.setOutputTarget(target);
proc.processReport();
target.close();
}
catch (Exception ex)
{
System.err.println("Generate PDF failed: " + ex);
}
finally
{
try
{
out.close();
}
catch (Exception e)
{
System.err.println("Output PDF failed: " + e);
}
}
}
/**
* @see javax.servlet.http.HttpServlet#void (javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
doGet(req, resp);
}
/**
* Reads the report from the swing-icons.xml report template.
*
* @param templateURL The template location.
*
* @return A report.
* @throws ElementDefinitionException if the report generator encountered an error.
* @throws IOException if there was an IO error while reading from the URL.
*/
private JFreeReport parseReport(final URL templateURL)
throws IOException, ElementDefinitionException
{
final ReportGenerator generator = ReportGenerator.getInstance();
return generator.parseReport(templateURL);
}
}
<?xml version="1.0" encoding="UTF-8"?>
report-definition
PUBLIC "-//JFreeReport//DTD report definition//EN//extended"
"http://jfreereport.sourceforge.net/extreport.dtd">
Java, java, J2SE, j2se, J2EE, j2ee, J2ME, j2me, ejb, ejb3, JBOSS, jboss, spring, hibernate, jdo, struts, webwork, ajax, AJAX, mysql, MySQL, Oracle, Weblogic, Websphere, scjp, scjd
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