在Eclipse RCP中使用JFreeChart指南

14年前

这是一篇文章介绍了如何在Eclipse Rich Client Platform (RCP)应用程序使用JFreeChart制图组件。用到了JFreeChart SWT实现，最新的Eclipse3.6(Helios)开发工具和JFreeChart1.0.13版本。

1.生成饼状图：

import java.awt.Font;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.ViewPart;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.experimental.chart.swt.ChartComposite;

public class View extends ViewPart {

 public void createPartControl(Composite parent) {
  JFreeChart chart = createChart(createDataset());
  new ChartComposite(parent, SWT.NONE,
    chart, true);
 }

 public void setFocus() {
 }

 /**
  * Creates the Dataset for the Pie chart
  */
 private PieDataset createDataset() {
  DefaultPieDataset dataset = new DefaultPieDataset();
  dataset.setValue("One", new Double(43.2));
  dataset.setValue("Two", new Double(10.0));
  dataset.setValue("Three", new Double(27.5));
  dataset.setValue("Four", new Double(17.5));
  dataset.setValue("Five", new Double(11.0));
  dataset.setValue("Six", new Double(19.4));
  return dataset;
 }

 /**
  * Creates the Chart based on a dataset
  */
 private JFreeChart createChart(PieDataset dataset) {

  JFreeChart chart = ChartFactory.createPieChart("Pie Chart Demo 1", // chart
    // title
    dataset, // data
    true, // include legend
    true, false);

  PiePlot plot = (PiePlot) chart.getPlot();
  plot.setSectionOutlinesVisible(false);
  plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 12));
  plot.setNoDataMessage("No data available");
  plot.setCircular(false);
  plot.setLabelGap(0.02);
  return chart;

 }
}

2.生成柱状图

import java.awt.Color;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.ViewPart;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.experimental.chart.swt.ChartComposite;

public class View extends ViewPart {

 private CategoryDataset createDataset() {
  DefaultCategoryDataset dataset = new DefaultCategoryDataset();

  // row keys...
  String series1 = "First";
  String series2 = "Second";

  // column keys...
  String category1 = "Label 1";
  String category2 = "Label 2";
  String category3 = "Label  3";

  dataset.addValue(1.0, series1, category1);
  dataset.addValue(4.0, series1, category2);
  dataset.addValue(3.0, series1, category3);

  dataset.addValue(5.0, series2, category1);
  dataset.addValue(7.0, series2, category2);
  dataset.addValue(6.0, series2, category3);

  return dataset;
 }

 /**
  * Creates a chart.
  * 
  * @param dataset
  *            dataset.
  * 
  * @return A chart.
  */
 private JFreeChart createChart(CategoryDataset dataset) {

  JFreeChart chart = ChartFactory.createBarChart("Bar Chart", // chart
    // title
    "Labels", // domain axis label
    "Values", // range axis label
    dataset, // data
    PlotOrientation.VERTICAL, // orientation
    true, // include legend
    true, // tooltips?
    false // URLs?
    );

  CategoryPlot plot = (CategoryPlot) chart.getPlot();
  plot.setBackgroundPaint(Color.lightGray);
  plot.setDomainGridlinePaint(Color.white);
  plot.setDomainGridlinesVisible(true);
  plot.setRangeGridlinePaint(Color.white);
  return chart;

 }

 public void createPartControl(Composite parent) {
  JFreeChart chart = createChart(createDataset());
  final ChartComposite frame = new ChartComposite(parent, SWT.NONE,
    chart, true);
 }

 public void setFocus() {
 }
}