请问怎么在生成的柱图、饼图上加入每块的值?比如生成的柱图有武汉、黄石、天门三根柱子,柱子的值分别是3000,1200,800,我要这三个值显示在三个柱子上(不是在最下面写,而是直接标在柱体上),该怎么做?
急!!!
急!!!
解决方案 »
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我自己反编译了源码,解决了问题,现在发到这里来:package com.dm.test.chart;import java.awt.*;
import java.text.NumberFormat;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.annotations.CategoryTextAnnotation;
import org.jfree.chart.axis.CategoryAnchor;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.*;public class BarChart3DDemo4 extends ApplicationFrame
{
static class CustomBarRenderer3D extends BarRenderer3D
{
public Paint getItemPaint(int i, int j)
{
CategoryDataset categorydataset = getPlot().getDataset();
double d = categorydataset.getValue(i, j).doubleValue();
if(d >= 0.69999999999999996D)
return Color.green;
else
return Color.red;
} public CustomBarRenderer3D()
{
}
}
public BarChart3DDemo4(String s)
{
super(s);
CategoryDataset categorydataset = createDataset();
JFreeChart jfreechart = createChart(categorydataset);
ChartPanel chartpanel = new ChartPanel(jfreechart);
chartpanel.setPreferredSize(new Dimension(500, 270));
setContentPane(chartpanel);
} private static CategoryDataset createDataset()
{
DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
defaultcategorydataset.addValue(0.77000000000000002D, "Series 1", "Robert");
defaultcategorydataset.addValue(0.93000000000000005D, "Series 1", "Mary");
defaultcategorydataset.addValue(0.58999999999999997D, "Series 1", "John");
defaultcategorydataset.addValue(0.75D, "Series 1", "Ellen");
defaultcategorydataset.addValue(0.63D, "Series 1", "Jack");
defaultcategorydataset.addValue(0.94999999999999996D, "Series 1", "David");
defaultcategorydataset.addValue(0.70999999999999996D, "Series 1", "Mark");
defaultcategorydataset.addValue(0.65000000000000002D, "Series 1", "Andy");
return defaultcategorydataset;
} private static JFreeChart createChart(CategoryDataset categorydataset)
{
JFreeChart jfreechart = ChartFactory.createBarChart3D("Student Grades", "Students", "Grade", categorydataset, PlotOrientation.VERTICAL, false, true, false);
CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();
CustomBarRenderer3D custombarrenderer3d = new CustomBarRenderer3D();
custombarrenderer3d.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());
custombarrenderer3d.setBaseItemLabelsVisible(true);
custombarrenderer3d.setItemLabelAnchorOffset(10D);
custombarrenderer3d.setPositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_CENTER));
categoryplot.setRenderer(custombarrenderer3d);
ValueMarker valueer = new ValueMarker(0.69999999999999996D, new Color(200, 200, 255), new BasicStroke(1.0F), new Color(200, 200, 255), new BasicStroke(1.0F), 1.0F);
categoryplot.addRangeMarker(valueer, Layer.BACKGROUND);
custombarrenderer3d.setItemLabelsVisible(true);
custombarrenderer3d.setMaximumBarWidth(0.050000000000000003D);
CategoryTextAnnotation categorytextannotation = new CategoryTextAnnotation("Minimum grade to pass", "Robert", 0.70999999999999996D);
categorytextannotation.setCategoryAnchor(CategoryAnchor.START);
categorytextannotation.setFont(new Font("SansSerif", 0, 12));
categorytextannotation.setTextAnchor(TextAnchor.BOTTOM_LEFT);
categoryplot.addAnnotation(categorytextannotation);
NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();
numberaxis.setNumberFormatOverride(NumberFormat.getPercentInstance());
numberaxis.setUpperMargin(0.10000000000000001D);
return jfreechart;
} public static JPanel createDemoPanel()
{
JFreeChart jfreechart = createChart(createDataset());
return new ChartPanel(jfreechart);
} public static void main(String args[])
{
BarChart3DDemo4 barchart3ddemo4 = new BarChart3DDemo4("3D Bar Chart Demo 4");
barchart3ddemo4.pack();
RefineryUtilities.centerFrameOnScreen(barchart3ddemo4);
barchart3ddemo4.setVisible(true);
}
}