使用jfreechart的具有上限线的java堆叠条形图
我试图生成一个堆叠条形图，每个类别都有一个上限。上限因每个类别而异，并用水平线表示
我能够生成堆叠条形图，但被水平线击中，以指示上限
这是示例图表
这是我生成堆叠条形图的代码
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Paint;
import java.awt.Stroke;
import java.io.IOException;
import java.io.OutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.LegendItem;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.axis.SubCategoryAxis;
import org.jfree.chart.plot.CategoryMarker;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.ValueMarker;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.category.GroupedStackedBarRenderer;
import org.jfree.data.KeyToGroupMap;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.GradientPaintTransformType;
import org.jfree.ui.Layer;
import org.jfree.ui.StandardGradientPaintTransformer;
public class StackedBarServlet extends HttpServlet{
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
response.setContentType("image/png");
OutputStream outputStream = response.getOutputStream();
final CategoryDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
int width = 800;
int height = 350;
ChartUtilities.writeChartAsPNG(outputStream, chart, width, height);
}
private CategoryDataset createDataset() {
DefaultCategoryDataset result = new DefaultCategoryDataset();
result.addValue(20.3, "Product 1 (US)", "Jan 04");
result.addValue(27.2, "Product 1 (US)", "Feb 04");
result.addValue(19.7, "Product 1 (US)", "Mar 04");
result.addValue(20.3, "Product 1 (US)", "Apr 04");
result.addValue(27.2, "Product 1 (US)", "May 04");
result.addValue(19.7, "Product 1 (US)", "Jun 04");
result.addValue(20.3, "Product 1 (US)", "Jul 04");
result.addValue(27.2, "Product 1 (US)", "Aug 04");
result.addValue(19.7, "Product 1 (US)", "Sep 04");
result.addValue(20.3, "Product 1 (US)", "Oct 04");
result.addValue(27.2, "Product 1 (US)", "Nov 04");
result.addValue(19.7, "Product 1 (US)", "Dec 04");
result.addValue(20.3, "Product 1 (US)", "Bab 04");
result.addValue(27.2, "Product 1 (US)", "Lal 04");
result.addValue(19.7, "Product 1 (US)", "Sha 04");
result.addValue(20.3, "Product 1 (UK)", "Jan 04");
result.addValue(27.2, "Product 1 (UK)", "Feb 04");
result.addValue(19.7, "Product 1 (UK)", "Mar 04");
result.addValue(20.3, "Product 1 (UK)", "Apr 04");
result.addValue(27.2, "Product 1 (UK)", "May 04");
result.addValue(19.7, "Product 1 (UK)", "Jun 04");
result.addValue(20.3, "Product 1 (UK)", "Jul 04");
result.addValue(27.2, "Product 1 (UK)", "Aug 04");
result.addValue(19.7, "Product 1 (UK)", "Sep 04");
result.addValue(20.3, "Product 1 (UK)", "Oct 04");
result.addValue(27.2, "Product 1 (UK)", "Nov 04");
result.addValue(19.7, "Product 1 (UK)", "Dec 04");
result.addValue(20.3, "Product 1 (UK)", "Bab 04");
result.addValue(27.2, "Product 1 (UK)", "Lal 04");
result.addValue(19.7, "Product 1 (UK)", "Sha 04");
result.addValue(20.3, "Product 1 (IND)", "Jan 04");
result.addValue(27.2, "Product 1 (IND)", "Feb 04");
result.addValue(19.7, "Product 1 (IND)", "Mar 04");
result.addValue(20.3, "Product 1 (IND)", "Apr 04");
result.addValue(27.2, "Product 1 (IND)", "May 04");
result.addValue(19.7, "Product 1 (IND)", "Jun 04");
result.addValue(20.3, "Product 1 (IND)", "Jul 04");
result.addValue(27.2, "Product 1 (IND)", "Aug 04");
result.addValue(19.7, "Product 1 (IND)", "Sep 04");
result.addValue(20.3, "Product 1 (IND)", "Oct 04");
result.addValue(27.2, "Product 1 (IND)", "Nov 04");
result.addValue(19.7, "Product 1 (IND)", "Dec 04");
result.addValue(20.3, "Product 1 (IND)", "Bab 04");
result.addValue(27.2, "Product 1 (IND)", "Lal 04");
result.addValue(19.7, "Product 1 (IND)", "Sha 04");
result.addValue(20.3, "Product 1 (EUROPE)", "Jan 04");
result.addValue(27.2, "Product 1 (EUROPE)", "Feb 04");
result.addValue(19.7, "Product 1 (EUROPE)", "Mar 04");
result.addValue(20.3, "Product 1 (EUROPE)", "Apr 04");
result.addValue(27.2, "Product 1 (EUROPE)", "May 04");
result.addValue(19.7, "Product 1 (EUROPE)", "Jun 04");
result.addValue(20.3, "Product 1 (EUROPE)", "Jul 04");
result.addValue(27.2, "Product 1 (EUROPE)", "Aug 04");
result.addValue(19.7, "Product 1 (EUROPE)", "Sep 04");
result.addValue(20.3, "Product 1 (EUROPE)", "Oct 04");
result.addValue(27.2, "Product 1 (EUROPE)", "Nov 04");
result.addValue(19.7, "Product 1 (EUROPE)", "Dec 04");
result.addValue(20.3, "Product 1 (EUROPE)", "Bab 04");
result.addValue(27.2, "Product 1 (EUROPE)", "Lal 04");
result.addValue(19.7, "Product 1 (EUROPE)", "Sha 04");
return result;
}
private JFreeChart createChart(final CategoryDataset dataset) {
final JFreeChart chart = ChartFactory.createStackedBarChart(
"Stacked Bar", // chart title
"Category", // domain axis label
"Value", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // the plot orientation
true, // legend
true, // tooltips
false // urls
);
GroupedStackedBarRenderer renderer = new GroupedStackedBarRenderer();
KeyToGroupMap map = new KeyToGroupMap("G1");
map.mapKeyToGroup("Product 1 (US)", "G1");
map.mapKeyToGroup("Product 1 (Europe)", "G1");
map.mapKeyToGroup("Product 1 (Asia)", "G1");
map.mapKeyToGroup("Product 1 (Middle East)", "G1");
renderer.setSeriesToGroupMap(map);
renderer.setItemMargin(0.0);
Paint p1 = new GradientPaint(
0.0f, 0.0f, new Color(0x22, 0x22, 0xFF), 0.0f, 0.0f, new Color(0x88, 0x88, 0xFF)
);
renderer.setSeriesPaint(0, p1);
renderer.setSeriesPaint(4, p1);
renderer.setSeriesPaint(8, p1);
Paint p2 = new GradientPaint(
0.0f, 0.0f, new Color(0x22, 0xFF, 0x22), 0.0f, 0.0f, new Color(0x88, 0xFF, 0x88)
);
renderer.setSeriesPaint(1, p2);
renderer.setSeriesPaint(5, p2);
renderer.setSeriesPaint(9, p2);
Paint p3 = new GradientPaint(
0.0f, 0.0f, new Color(0xFF, 0x22, 0x22), 0.0f, 0.0f, new Color(0xFF, 0x88, 0x88)
);
renderer.setSeriesPaint(2, p3);
renderer.setSeriesPaint(6, p3);
renderer.setSeriesPaint(10, p3);
Paint p4 = new GradientPaint(
0.0f, 0.0f, new Color(0xFF, 0xFF, 0x22), 0.0f, 0.0f, new Color(0xFF, 0xFF, 0x88)
);
renderer.setSeriesPaint(3, p4);
renderer.setSeriesPaint(7, p4);
renderer.setSeriesPaint(11, p4);
renderer.setGradientPaintTransformer(
new StandardGradientPaintTransformer(GradientPaintTransformType.HORIZONTAL)
);
SubCategoryAxis domainAxis = new SubCategoryAxis("Product");
domainAxis.setCategoryMargin(0.15);
CategoryPlot plot = (CategoryPlot) chart.getPlot();
plot.setDomainAxis(domainAxis);
plot.setRenderer(renderer);
plot.setFixedLegendItems(createLegendItems());
/*
* This is used to draw a vertical line
*/
/* Stroke stroke = new BasicStroke(2.0f);
ValueMarker marker = new ValueMarker(100); // position is the value on the axis
marker.setPaint(Color.black);
marker.setStroke(stroke);
CategoryPlot plot1 = chart.getCategoryPlot();
plot1.addRangeMarker(marker,Layer.FOREGROUND); */
return chart;
}
private LegendItemCollection createLegendItems() {
LegendItemCollection result = new LegendItemCollection();
LegendItem item1 = new LegendItem("US", new Color(0x22, 0x22, 0xFF));
LegendItem item2 = new LegendItem("Europe", new Color(0x22, 0xFF, 0x22));
LegendItem item3 = new LegendItem("Asia", new Color(0xFF, 0x22, 0x22));
LegendItem item4 = new LegendItem("Middle East", new Color(0xFF, 0xFF, 0x22));
result.add(item1);
result.add(item2);
result.add(item3);
result.add(item4);
return result;
}
}
当我使用addRangeMarker时，它会给我一条连续的水平线。但在我的例子中，我需要为每个类别分别设置多条水平线
下面是带有addRangeMarker的示例图像
提前谢谢
# 1 楼答案
您需要创建第二个数据集，其中包含要用水平黑线显示的值。将该数据集与^{} 一起添加到绘图中