helloworld.java

Java的Web报表库

/**
 * ========================================
 * JFreeReport : a free Java report library
 * ========================================
 *
 * Project Info:  http://www.jfree.org/jfreereport/index.html
 * Project Lead:  Thomas Morgner;
 *
 * (C) Copyright 2000-2003, by Simba Management Limited and Contributors.
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * ---------------
 * HelloWorld.java
 * ---------------
 * (C)opyright 2002, 2003, by Simba Management Limited.
 *
 * Original Author:  David Gilbert (for Simba Management Limited);
 * Contributor(s):   -;
 *
 * $Id: HelloWorld.java,v 1.10.2.2 2003/08/24 14:18:07 taqua Exp $
 *
 * Changes
 * -------
 * 10-Dec-2002 : Version 1 (DG);
 *
 */

package com.jrefinery.report.demo;

import java.awt.Color;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.Rectangle2D;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;

import com.jrefinery.report.ElementAlignment;
import com.jrefinery.report.ItemFactory;
import com.jrefinery.report.JFreeReport;
import com.jrefinery.report.ReportProcessingException;
import com.jrefinery.report.TextElement;
import com.jrefinery.report.preview.PreviewDialog;
import com.jrefinery.report.util.Log;

/**
 * A very simple JFreeReport demo.  The purpose of this demo is to illustrate the basic steps
 * required to connect a report definition with some data and display a report preview on-screen.
 *
 * In this example, the report definition is created in code.  It is also possible to read a
 * report definition from an XML file...that is demonstrated elsewhere.
 *
 * @author David Gilbert
 */
public class HelloWorld
{
  /**
   * Window close handler.
   */
  protected class CloseHandler extends WindowAdapter
  {
    /**
     * Handles the window closing event.
     *
     * @param event  the window event.
     */
    public void windowClosing(final WindowEvent event)
    {
      System.exit(0);
    }
  }

  /**
   * Creates and displays a simple report.
   */
  public HelloWorld()
  {

    final TableModel data = createData();
    final JFreeReport report = createReportDefinition();
    report.setData(data);
    try
    {
      final PreviewDialog preview = new PreviewDialog(report);
      preview.addWindowListener(new CloseHandler());
      preview.pack();
      preview.setVisible(true);
    }
    catch (ReportProcessingException e)
    {
      Log.error("Failed to generate report ", e);
    }

  }

  /**
   * Creates a small dataset to use in a report.  JFreeReport always reads data from a
   * <code>TableModel</code> instance.
   *
   * @return a dataset.
   */
  private TableModel createData()
  {

    final Object[] columnNames = new String[]{"Column1", "Column2"};
    final DefaultTableModel result = new DefaultTableModel(columnNames, 1);
    result.setValueAt("Hello", 0, 0);
    result.setValueAt("World!", 0, 1);
    return result;

  }

  /**
   * Creates a report definition.
   *
   * @return a report definition.
   */
  private JFreeReport createReportDefinition()
  {

    final JFreeReport report = new JFreeReport();
    report.setName("A Very Simple Report");

    final TextElement t1 = ItemFactory.createStringElement(
        "T1",
        new Rectangle2D.Double(0.0, 0.0, 150.0, 20.0),
        Color.black,
        ElementAlignment.LEFT.getOldAlignment(),
        ElementAlignment.MIDDLE.getOldAlignment(),
        null, // font
        "-", // null string
        "Column1"
    );

    report.getItemBand().addElement(t1);

    final TextElement t2 = ItemFactory.createStringElement(
        "T2",
        new Rectangle2D.Double(200.0, 0.0, 150.0, 20.0),
        Color.black,
        ElementAlignment.LEFT.getOldAlignment(),
        ElementAlignment.MIDDLE.getOldAlignment(),
        null, // font
        "-", // null string
        "Column2"
    );

    report.getItemBand().addElement(t2);
    return report;

  }

  /**
   * The starting point for the "Hello World" demo application.
   *
   * @param args  ignored.
   */
  public static void main(final String[] args)
  {
    //final HelloWorld app = 
    new HelloWorld();
  }

}