jfreechar 柱状图 博客分类： java语言 jfreechart柱状图

版本： jfreechar.1.0.13

package demo;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Paint;
import java.awt.PaintContext;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.ColorModel;

import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.util.PaintList;

public class BarChartDemo8 extends ApplicationFrame
{
  public BarChartDemo8(String paramString)
  {
    super(paramString);
    CategoryDataset localCategoryDataset = createDataset();
    JFreeChart localJFreeChart = createChart(localCategoryDataset);
    ChartPanel localChartPanel = new ChartPanel(localJFreeChart);
    localChartPanel.setPreferredSize(new Dimension(500, 270));
    setContentPane(localChartPanel);
  }

  private static CategoryDataset createDataset()
  {
    String str1 = "First";
    String str2 = "Second";
    String str3 = "Third";
    String str4 = "北京";
    String str5 = "天津";
    String str6 = "上海";
    String str7 = "广州";
    String str8 = "深圳";
    
    
    
    
    DefaultCategoryDataset localDefaultCategoryDataset = new DefaultCategoryDataset();
    localDefaultCategoryDataset.addValue(1.0D, str1, str4);
    localDefaultCategoryDataset.addValue(4.0D, str1, str5);
    localDefaultCategoryDataset.addValue(3.0D, str1, str6);
    localDefaultCategoryDataset.addValue(5.0D, str1, str7);
    localDefaultCategoryDataset.addValue(5.0D, str1, str8);
    
    
  
    
    /*localDefaultCategoryDataset.addValue(5.0D, str2, str4);
    localDefaultCategoryDataset.addValue(7.0D, str2, str5);
    localDefaultCategoryDataset.addValue(6.0D, str2, str6);
    localDefaultCategoryDataset.addValue(8.0D, str2, str7);
    localDefaultCategoryDataset.addValue(4.0D, str2, str8);
    
    localDefaultCategoryDataset.addValue(4.0D, str3, str4);
    localDefaultCategoryDataset.addValue(3.0D, str3, str5);
    localDefaultCategoryDataset.addValue(2.0D, str3, str6);
    localDefaultCategoryDataset.addValue(3.0D, str3, str7);
    localDefaultCategoryDataset.addValue(6.0D, str3, str8);
    */
    
    return localDefaultCategoryDataset;
  }

  private static JFreeChart createChart(CategoryDataset paramCategoryDataset)
  {
      
      Font font = new Font("微软雅黑", Font.PLAIN, 12);  
      
      Font fontTitle = new Font("微软雅黑", Font.BOLD, 14);  
      
      
    /**
     * Creates a bar chart. The chart object returned by this method uses a 
     * CategoryPlot instance as the plot, with a CategoryAxis for the domain axis, 
     * a NumberAxis as the range axis, and a BarRenderer as the renderer.

        Parameters:
                    title : the chart title (null permitted).
                    categoryAxisLabel : the label for the category axis (null permitted).
                    valueAxisLabel : the label for the value axis (null permitted).
                    dataset : the dataset for the chart (null permitted).
                    orientation : the plot orientation (horizontal or vertical) (null not permitted).
                    legend : a flag specifying whether or not a legend is required.
                    tooltips : configure chart to generate tool tips?
                    urls : configure chart to generate URLs?
        Returns:
                    A bar chart.  
     */
    JFreeChart localJFreeChart = 
        ChartFactory.createBarChart("注册会员统计", 
                                    "( 月份 )", 
                                    "数量", 
                                    paramCategoryDataset, 
                                    PlotOrientation.VERTICAL,
                                    false, 
                                    true, 
                                    false);
    
    
    //localJFreeChart.setBackgroundImage();//设置背景图片
    localJFreeChart.setTitle(new TextTitle(localJFreeChart.getTitle().getText(), fontTitle));//设置标题字体样式
    
    
    /**
     * Returns the plot for the chart. 
     * The plot is a class responsible for coordinating the visual representation of the data, 
     * including the axes (if any).
     =============================================================================================*/
    CategoryPlot localCategoryPlot = (CategoryPlot)localJFreeChart.getPlot();
    
    
    
    
    /**
     * Returns the range axis for the plot. 
     * If the range axis for this plot is null, then the method will return the parent plot's 
     * range axis (if there is a parent plot).
     =============================================================================================*/
    NumberAxis localNumberAxis = (NumberAxis)localCategoryPlot.getRangeAxis();
    
    /**Sets the source for obtaining standard tick units for the axis,
     * and sends an AxisChangeEvent to all registered listeners. */
    localNumberAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    localNumberAxis.setUpperMargin(0.15D);
    localNumberAxis.setLabelFont(font);
    
    
    
    
    
    /**
     * Returns a reference to the renderer for the plot.
     * =============================================================================================*/     
    CategoryItemRenderer localCategoryItemRenderer = localCategoryPlot.getRenderer();    
    localCategoryItemRenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
    
    /**Sets a flag that controls the visibility of the item labels for a series.
     */
    localCategoryItemRenderer.setSeriesItemLabelsVisible(0, Boolean.TRUE); //设置柱体顶部显示数字
    localCategoryItemRenderer.setSeriesPaint(0, new Color(0,128,128));     //设置柱体颜色
    
    
    
    
    
    
    /**
     * Returns the domain axis for the plot. 
     * If the domain axis for this plot is null, then the method will return the parent 
     * plot's domain axis (if there is a parent plot).
     =============================================================================================*/
    
    
    
    CategoryAxis localCategoryAxis = localCategoryPlot.getDomainAxis();    
    localCategoryAxis.setLabelFont(font); //设置X轴标志字体
    //localCategoryAxis.setAxisLinePaint();
    //localCategoryAxis.setAxisLineStroke(stroke);
    // localCategoryAxis.setCategoryLabelPositionOffset(0);//设置类别标签距离X轴的高度
    localCategoryAxis.setUpperMargin(0.10);   //设置右边距
    localCategoryAxis.setCategoryMargin(0.55);//设置每个柱体的宽度(0.70 表示: 百分比)
    localCategoryAxis.setTickLabelFont(font);//设置X轴上的分类字体
    localCategoryAxis.setCategoryLabelPositions(CategoryLabelPositions.STANDARD);//设置X轴上的分类倾斜的角度
    
 
    
    return localJFreeChart;
  }

  public static JPanel createDemoPanel()
  {
    JFreeChart localJFreeChart = createChart(createDataset());
    return new ChartPanel(localJFreeChart);
  }

  public static void main(String[] paramArrayOfString)
  {
    BarChartDemo8 localBarChartDemo8 = new BarChartDemo8("JFreeChart: BarChartDemo8.java");
    localBarChartDemo8.pack();
    RefineryUtilities.centerFrameOnScreen(localBarChartDemo8);
    localBarChartDemo8.setVisible(true);
  }
}