horizontalbarimagemapservlet.java

jCharts是一个100％基于Java的制图工具

/***********************************************************************************************
 * File Info: $Id: HorizontalBarImageMapServlet.java,v 1.3 2003/03/14 03:23:23 nathaniel_auvil Exp $
 * Copyright (C) 2002
 * Author: Nathaniel G. Auvil
 * Contributor(s):
 *
 * Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
 *
 * Redistribution and use of this software and associated documentation ("Software"), with or
 * without modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and notices.
 * 	Redistributions must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * 	conditions and the following disclaimer in the documentation and/or other materials
 * 	provided with the distribution.
 *
 * 3. The name "jCharts" or "Nathaniel G. Auvil" must not be used to endorse or promote
 * 	products derived from this Software without prior written permission of Nathaniel G.
 * 	Auvil.  For written permission, please contact [e-mail]
 *
 * 4. Products derived from this Software may not be called "jCharts" nor may "jCharts" appear
 * 	in their names without prior written permission of Nathaniel G. Auvil. jCharts is a
 * 	registered trademark of Nathaniel G. Auvil.
 *
 * 5. Due credit should be given to the jCharts Project (http://jcharts.sourceforge.net/).
 *
 * THIS SOFTWARE IS PROVIDED BY Nathaniel G. Auvil AND CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * jCharts OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 ************************************************************************************************/

package org.jCharts.demo.simpleServlet;


import org.jCharts.axisChart.AxisChart;
import org.jCharts.chartData.*;
import org.jCharts.chartData.interfaces.IAxisDataSeries;
import org.jCharts.imageMap.ImageMap;
import org.jCharts.properties.*;
import org.jCharts.properties.util.ChartFont;
import org.jCharts.types.ChartType;

import javax.servlet.ServletException;
import javax.servlet.http.*;
import java.awt.*;
import java.io.IOException;


public class HorizontalBarImageMapServlet extends HttpServlet
{
	//---all of my charts serviced by this Servlet will have the same properties.
	private BarChartProperties barChartProperties;

	//---all of my charts serviced by this Servlet will have the same properties.
	protected LegendProperties legendProperties;
	protected AxisProperties axisProperties;
	protected ChartProperties chartProperties;

	protected int width = 550;
	protected int height = 360;


	/**********************************************************************************************
	 *
	 **********************************************************************************************/
	public void init()
	{
		this.legendProperties = new LegendProperties();
		this.chartProperties = new ChartProperties();
		this.axisProperties = new AxisProperties( true );
		ChartFont axisScaleFont = new ChartFont( new Font( "Georgia Negreta cursiva", Font.PLAIN, 13 ), Color.black );
		axisProperties.getXAxisProperties().setScaleChartFont( axisScaleFont );
		axisProperties.getYAxisProperties().setScaleChartFont( axisScaleFont );

		ChartFont axisTitleFont = new ChartFont( new Font( "Arial Narrow", Font.PLAIN, 14 ), Color.black );
		axisProperties.getXAxisProperties().setTitleChartFont( axisTitleFont );
		axisProperties.getYAxisProperties().setTitleChartFont( axisTitleFont );

		ChartFont titleFont = new ChartFont( new Font( "Georgia Negreta cursiva", Font.PLAIN, 14 ), Color.black );
		this.chartProperties.setTitleFont( titleFont );

		this.barChartProperties = new BarChartProperties();
	}


	/**********************************************************************************************
	 *
	 *
	 **********************************************************************************************/
	public void service( HttpServletRequest httpServletRequest,
								HttpServletResponse httpServletResponse ) throws ServletException, IOException
	{
		try
		{
			String[] xAxisLabels = {"1995", "1996", "1997", "1998", "1999", "2000", "2001", "2002", "2003", "2004"};
			String xAxisTitle = "Years";
			String yAxisTitle = "Problems";
			String title = "Micro$oft At Work";
			IAxisDataSeries dataSeries = new DataSeries( xAxisLabels, xAxisTitle, yAxisTitle, title );

			double[][] data = new double[][]{{1500, 6880, 4510, 2600, 1200, 1580, 8000, 4555, 4000, 6120}};
			String[] legendLabels = {"Bugs"};
			Paint[] paints = new Paint[]{Color.blue.darker()};
			dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, legendLabels, paints, ChartType.BAR, this.barChartProperties ) );

			AxisChart axisChart = new AxisChart( dataSeries, this.chartProperties, this.axisProperties, this.legendProperties, this.width, this.height );

			//---this call will render the chart to an internal BufferedImage, creating all the image map coordinates
			axisChart.renderWithImageMap();

			//---get the ImageMap information from the chart
			ImageMap imageMap = axisChart.getImageMap();

			//---set the ImageMap into the HttpServletRequest so can get it out in JSP
			httpServletRequest.setAttribute( ChartServlet.IMAGE_MAP, imageMap );

			//---set the Chart into the HttpSession so we can stream it in another request
			httpServletRequest.getSession( true ).setAttribute( ChartServlet.CHART, axisChart );
		}
		catch( ChartDataException chartDataException )
		{
			chartDataException.printStackTrace();
		}
		catch( PropertyException propertyException )
		{
			propertyException.printStackTrace();
		}


		this.getServletContext().getRequestDispatcher( "/imageMapChart.jsp" ).forward( httpServletRequest, httpServletResponse );
	}

}