Jfreechart http://blog.csdn.net/yjfhg/archive/2006/09/05/1179856.aspx

Posted on 2009-06-22 11:37 hanwei 阅读(342) 评论(0) 编辑收藏所属分类: JfreeChart

以前上级让整理的,花了挺多工夫,现在估计已经落后了.供初学者参考.

1. download JFreeChart ZIP
download jfreechart-1.0.0-rc3.zip

from http://www.jfree.org/jfreechart/index.html

2. jfreechart config and install
 1. Extract the file jfreechart-1.0.0-rc3.zip to some place:package source is the souce code of jfreechart;jfreechart-0.9.21-demo.jar is the example ,you can run it directly;package lib is which we need ,copy them to the package lib of the structs.
 2. Add codes as below to WEB-INF"web.xml :
 <servlet>
 <servlet-name>DisplayChart</servlet-name>
 <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
 </servlet>
 <servlet-mapping>
 <servlet-name>DisplayChart</servlet-name>
 <url-pattern>/servlet/DisplayChart</url-pattern>
 </servlet-mapping>
3 .programming

⑴constitute DataSet :

Create dateset such as DefaultPieDataset DefaultCategoryDataset, XYSeriesCollection and so on,and then fill data in them.

⑵ create jfreechart plot :

Create plot such as XYPlot, PiePlot3D, CategoryPlot and so on.

⑶ create JFreeChart :

There are two ways.one is through build a jfreechart class by plot.The other is to create by using Class ChartFactory,this way can omit step 2.

⑷ show chart: save Chart As pictures and come out the URLs of the pictures.And the show them through image property.

package yjf.biz.jchart;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.xy.DefaultTableXYDataset;
import org.jfree.data.xy.CategoryTableXYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.chart.*;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.urls.TimeSeriesURLGenerator;
import org.jfree.ui.TextAnchor;
import java.util.Locale;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Locale;
import java.awt.Insets;
import java.awt.Font;
import java.awt.Color;
import java.awt.geom.Ellipse2D;
import java.io.PrintWriter;
import javax.servlet.http.HttpSession;
import java.text.SimpleDateFormat;
import java.text.NumberFormat;
import java.text.DecimalFormat;

public class generatechart {

public static String generateXYChart(HttpSession session,PrintWriter pw) {

            String filename = null;
         try {
                  ArrayList site = new ArrayList();
                    site.add("aaa");
                        ....

Iterator iter = site.listIterator();
 CategoryTableXYDataset xydataset= new CategoryTableXYDataset();
 SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd",Locale.UK);
 while (iter.hasNext())
 {
 String section = (String)iter.next();
 //dataset自添加
 if ( dataset.getRowCount()>0)
 {
 for (int i=0;i<dataset.getRowCount();i++)
 {
 xydataset.add((sdf.parse(dataset.getCells(i,0))).getTime(),
 Double.valueOf((String)dataset.getCells(i,1)).doubleValue(),section);

System.out.print((sdf.parse(dataset.getCells(i,0))).getTime()+"$"+dataset.getCells(i,0)+"*"+
Double.valueOf((String)dataset.getCells(i,1)).doubleValue()+" ");

              }
             }
            else{}
            }

             // Create tooltip and URL generators
           StandardXYToolTipGenerator ttg = new StandardXYToolTipGenerator(
                                                StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT,
                                                sdf, NumberFormat.getInstance());
           TimeSeriesURLGenerator urlg = new TimeSeriesURLGenerator(
                                             sdf, "barchart3D.jsp", "series", "hitDate");

JFreeChart chart = ChartFactory.createTimeSeriesChart("TimeSeriesChart", "date", "smt_nt",xydataset,true, true,false);
 XYPlot plot=chart.getXYPlot();

 StandardXYItemRenderer renderer = new StandardXYItemRenderer(
 StandardXYItemRenderer.LINES + StandardXYItemRenderer.SHAPES,
 ttg, urlg);
 plot.setRenderer(renderer);

 chart.setBackgroundPaint(java.awt.Color.white);

 filename = ServletUtilities.saveChartAsPNG(chart,780,500, null, session);
 // Write the image map to the PrintWriter
 }
 catch (Exception e) {
 System.out.println("Exception - " + e.toString());
 e.printStackTrace(System.out);
 filename = "public_error_500x300.png";
 }
 return filename;
 }

 public String generatePieChart(String title, HttpSession session)
 {
 DefaultPieDataset piedata = new DefaultPieDataset();
 String filename = null;
 try {
 //dataset自添加
 if ( dataset.getRowCount()>0)
 {
 for (int i=0;i<dataset.getRowCount();i++)
 {
 piedata.setValue(dataset.getCells(i,0),Double.valueOf((String)dataset.getCells(i,1)).doubleValue());
 }
 }
 else{}

 PiePlot3D plot = new PiePlot3D(piedata);
 plot.setDepthFactor(0.05);
 plot.setLabelGenerator(new StandardPieItemLabelGenerator(StandardPieItemLabelGenerator.DEFAULT_TOOLTIP_FORMAT));
 plot.setLabelGenerator(new StandardPieItemLabelGenerator("{0}/{1}k/{2}"));
 JFreeChart chart = new JFreeChart(title, JFreeChart.DEFAULT_TITLE_FONT,plot, true);
 filename = ServletUtilities.saveChartAsPNG(chart, 750, 500, null,session);

}
 catch (Exception e)
 {
 System.out.println("Exception - " + e.toString());
 e.printStackTrace(System.out);
 filename = "public_error_500x300.png";
 }
 return filename;
}

public String generateStackedBarChart3D1(HttpSession session)
{
 DefaultCategoryDataset stackedDateset= new DefaultCategoryDataset();
 String filename = null;
try {
 //dataset自添加
 if ( dataset.getRowCount()>0)
 {
 for (int i=0;i<dataset.getRowCount();i++)
 {
 stackedDateset.addValue(Double.valueOf((String)dataset.getCells(i,2)).
 doubleValue(),dataset.getCells(i,1),dataset.getCells(i,0));
 }
 }
 else{}

JFreeChart chart = ChartFactory.createStackedBarChart3D("StackedBarChart3D1", "date", "smt_nt",stackedDateset, PlotOrientation.VERTICAL,true, true,true);

filename = ServletUtilities.saveChartAsPNG(chart,750,500, null,session);

}
catch (Exception e)
{
 System.out.println("Exception - " + e.toString());
 e.printStackTrace(System.out);
 filename = "public_error_500x300.png";
}
return filename;
}

public String generateBarChart3D(HttpSession session)
{
 DefaultCategoryDataset stacked1Dateset= new DefaultCategoryDataset();
 String filename = null;
 try {
 //dataset自添加
 if ( dataset.getRowCount()>0)
 {
 for (int i=0;i<dataset.getRowCount();i++)
 {
 stacked1Dateset.addValue(Double.valueOf((String)dataset.getCells(i,2)).
 doubleValue(),dataset.getCells(i,1),dataset.getCells(i,0));
 }
 }
 else{}

 JFreeChart chart = ChartFactory.createBarChart3D("BarChart3D1", "date", "smt_nt",stacked1Dateset, PlotOrientation.VERTICAL,true, true,true);

 filename = ServletUtilities.saveChartAsPNG(chart,750,500, null,session);
 }
 catch (Exception e)
 {
 System.out.println("Exception - " + e.toString());
 e.printStackTrace(System.out);
 filename = "public_error_500x300.png";
 }
 return filename;
}

public String generateStackedBarChart3D2(HttpSession session)
{
 String filename = null;
 DefaultCategoryDataset stacked1Dateset= new DefaultCategoryDataset();
 try {

 if ( dataset.getRowCount()>0)
 {
 for (int i=0;i<dataset.getRowCount();i++)
 {
 stacked1Dateset.addValue(Double.valueOf((String)dataset.
 getCells(i,2)).doubleValue(),dataset.getCells(i,1),dataset.getCells(i,0));
 }
 }
 else{}

 JFreeChart chart = ChartFactory.createStackedBarChart3D
 ("StackedBarChart3D1", "date", "smt_nt",stacked1Dateset, PlotOrientation.VERTICAL,true, true,true);

 filename = ServletUtilities.saveChartAsPNG(chart,750,500, null,session);

 }
 catch (Exception e)
 {
 System.out.println("Exception - " + e.toString());
 e.printStackTrace(System.out);
 filename = "public_error_500x300.png";
 }
 return filename;
}

}

jsp:
<%

generatechart chart = new generatechart();

String piechart = chart.generatePieChart("PieChart",session);

String piechartURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + piechart;

String barchart3D = chart.generateBarChart3D(session);

String barchart3DURL = request.getContextPath() + "/servlet/DisplayChart?filename=" +barchart3D;

String stackedbarchart3D1 = chart.generateStackedBarChart3D1(session);

String stackedbarchart3D1URL = request.getContextPath() + "/servlet/DisplayChart?filename=" +stackedbarchart3D1;

String stackedbarchart3D2 = chart.generateStackedBarChart3D2(session);

String stackedbarchart3D2URL = request.getContextPath() + "/servlet/DisplayChart?filename=" + stackedbarchart3D2;

String linechart = chart.generateXYChart(session,new PrintWriter(out));

String linechartURL= request.getContextPath() + "/servlet/DisplayChart?filename=" + linechart;

%>

<HTML>

<HEAD>

 <TITLE>yjf/jchart/jfreechart</TITLE>

</HEAD>

<BODY>



 <img src="<%= piechartURL %>" width=750 height=500 border=0 ">





 <img src="<%= barchart3DURL%>" width=750 height=500 border=0 ">





 <img src="<%= stackedbarchart3D1URL %>" width=750 height=500 border=0 ">





 <img src="<%=stackedbarchart3D2URL%>" width=750 height=500 border=0 ">





 <img src="<%= linechartURL%>" width=700 height=500 border=0 usemap="#<%=linechart%>">

发表于 @ 2006年09月05日 13:45:00|评论(0 )