在servlet中使用jfreereport直接产生pdf文件报表

//- GenPDFByJfreereportTemplateServlet.javapackage acme.web.servlets;#region//- GenPDFByJfreereportTemplateServlet.javapackage 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;
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);
   }


}
#endregion

//- swing-icons.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE report-definition   PUBLIC

"-//JFreeReport//DTD report definition//EN//extended"

"http://jfreereport.sourceforge.net/extreport.dtd"><!--

***************************************************************** --><!-- *  Swing-Icons.XML

                                             * --><!-- *  A sample report definition used as

an introduction to        * --><!-- *  JFreeReport.

       * --><!-- ***************************************************************** --

><report-definition name="First Report">  <!-- ************************ -->  <!-- * PARSER

CONFIGURATION * -->  <!-- ************************ -->  <parser-config>    <object-factory

class="org.jfree.report.modules.parser.ext.factory.objects.DefaultClassFactory"/>

<element-factory

class="org.jfree.report.modules.parser.ext.factory.elements.DefaultElementFactory"/>

<stylekey-factory

class="org.jfree.report.modules.parser.ext.factory.stylekey.DefaultStyleKeyFactory"/>

<stylekey-factory

class="org.jfree.report.modules.parser.ext.factory.stylekey.PageableLayoutStyleKeyFactory"/>

   <template-factory

class="org.jfree.report.modules.parser.ext.factory.templates.DefaultTemplateCollection"/>
<datasource-factory

class="org.jfree.report.modules.parser.ext.factory.datasource.DefaultDataSourceFactory"/>
  </parser-config>

  <!-- ************************ -->
  <!-- * REPORT CONFIGURATION * -->
  <!-- ************************ -->
  <report-config>
    <defaultpageformat orientation="portrait"
      pageformat="LETTER"
      topmargin="72"
      bottommargin="72"
      leftmargin="72"
      rightmargin="72"/>
  </report-config>

  <!-- ********** -->
  <!-- * STYLES * -->
  <!-- ********** -->
  <styles>
    <style name="medium-line">
      <compound-key name="min-size">
        <basic-object name="height">0.0</basic-object>
        <basic-object name="width">-100.0</basic-object>
      </compound-key>
      <basic-key name="paint">black</basic-key>
      <basic-key name="stroke" class="java.awt.BasicStroke">0.5</basic-key>
      <basic-key name="draw-shape">true</basic-key>
      <basic-key name="scale">true</basic-key>
    </style>

    <style name="background-rectangle">
      <compound-key name="absolute_pos">
        <basic-object name="x">0.0</basic-object>
        <basic-object name="y">0.0</basic-object>
      </compound-key>
      <compound-key name="min-size">
        <basic-object name="height">-100.0</basic-object>
        <basic-object name="width">-100.0</basic-object>
      </compound-key>
      <basic-key name="fill-shape">true</basic-key>
      <basic-key name="scale">true</basic-key>
    </style>
  </styles>

  <!-- ********************** -->
  <!-- * REPORT DESCRIPTION * -->
  <!-- ********************** -->
  <report-description>

    <!-- ================= -->
    <!-- = REPORT HEADER = -->
    <!-- ================= -->
    <report-header name="report-header-band">
      <style>
        <compound-key name="min-size">
          <basic-object name="height">112.0</basic-object>
          <basic-object name="width">0.0</basic-object>
        </compound-key>
      </style>

      <default-style>
        <basic-key name="font">SansSerif</basic-key>
<basic-key name="font-size">10</basic-key>
        <basic-key name="valignment">bottom</basic-key>
      </default-style>

      <element name="title1" type="text/plain">
        <style>
          <compound-key name="absolute_pos">
            <basic-object name="x">0.0</basic-object>
            <basic-object name="y">2.0</basic-object>
          </compound-key>
          <compound-key name="min-size">
            <basic-object name="height">18.0</basic-object>
            <basic-object name="width">-100.0</basic-object>
          </compound-key>
          <basic-key name="alignment">center</basic-key>
          <basic-key name="font-size">18</basic-key>
          <basic-key name="font-bold">true</basic-key>
        </style>
        <template references="label">
          <basic-object name="content">Java Look and Feel Graphics Repository</basic-object>
        </template>
      </element>

      <element name="description1" type="text/plain">
        <style>
          <compound-key name="absolute_pos">
            <basic-object name="x">0.0</basic-object>
            <basic-object name="y">32.0</basic-object>
          </compound-key>
          <compound-key name="min-size">
            <basic-object name="height">10.0</basic-object>
            <basic-object name="width">-100.0</basic-object>
          </compound-key>
        </style>

        <template references="label">
          <basic-object name="content">This report lists the icons contained in the Java

Look and Feel Graphics Repository.</basic-object>
        </template>
      </element>

      <element name="description2" type="text/plain">
        <style>
          <compound-key name="absolute_pos">
            <basic-object name="x">0.0</basic-object>
            <basic-object name="y">44.0</basic-object>
</compound-key>
          <compound-key name="min-size">
            <basic-object name="height">10.0</basic-object>
            <basic-object name="width">-100.0</basic-object>
          </compound-key>
        </style>
        <template references="label">
          <basic-object name="content">For more information about the repository, refer

to:</basic-object>
        </template>
      </element>

      <element name="url1" type="text/plain">
        <style>
          <compound-key name="absolute_pos">
            <basic-object name="x">0.0</basic-object>
            <basic-object name="y">68.0</basic-object>
          </compound-key>
          <compound-key name="min-size">
            <basic-object name="height">10.0</basic-object>
            <basic-object name="width">-100.0</basic-object>
          </compound-key>
          <basic-key name="alignment">center</basic-key>
          <basic-key name="font">Monospaced</basic-key>
          <basic-key name="font-size">9</basic-key>
        </style>
        <template references="label">
          <basic-object

name="content">http://developer.java.sun.com/developer/techDocs/hi/repository/</basic-

object>
        </template>
      </element>

      <element name="description3" type="text/plain">
        <style>
          <compound-key name="absolute_pos">
            <basic-object name="x">0.0</basic-object>
            <basic-object name="y">92.0</basic-object>
          </compound-key>
          <compound-key name="min-size">
            <basic-object name="height">10.0</basic-object>
            <basic-object name="width">-100.0</basic-object>
          </compound-key>
        </style>
        <template references="label">
          <basic-object name="content">The design of this report is described in the

JFreeReport PDF documentation.</basic-object>
 </template>
      </element>

    </report-header>

    <!-- ================= -->
    <!-- = REPORT FOOTER = -->
    <!-- ================= -->
    <report-footer name="report-footer-band">

      <style>
        <compound-key name="min-size">
          <basic-object name="height">30.0</basic-object>
          <basic-object name="width">0.0</basic-object>
        </compound-key>
      </style>

      <default-style>
        <basic-key name="font">SansSerif</basic-key>
        <basic-key name="font-size">12</basic-key>
        <basic-key name="font-bold">true</basic-key>
        <basic-key name="valignment">bottom</basic-key>
      </default-style>

      <element name="rect1" type="shape/generic">
        <style>
          <extends name="background-rectangle"/>
          <basic-key name="paint">#ccffcc</basic-key>
        </style>
        <template references="rectangle"/>
      </element>

      <element type="shape/generic">
        <style>
          <extends name="medium-line"/>
          <compound-key name="absolute_pos">
            <basic-object name="x">0.0</basic-object>
            <basic-object name="y">0.0</basic-object>
          </compound-key>
        </style>
        <template references="horizontal-line"/>
      </element>

      <element type="shape/generic">
        <style>
          <extends name="medium-line"/>
          <compound-key name="absolute_pos">
            <basic-object name="x">0.0</basic-object>
            <basic-object name="y">30.0</basic-object>
          </compound-key>
        </style>
        <template references="horizontal-line"/>
      </element>

      <element name="reportTotalLabel" type="text/plain">
        <style>
          <compound-key name="absolute_pos">
 <basic-object name="x">0.0</basic-object>
            <basic-object name="y">10.0</basic-object>
          </compound-key>
          <compound-key