jfreeChart圆柱状图详细设置

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圆形柱状图，直接看代码（有详细注释）

BarChart3DCase.java

package com.graph.myself;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.io.File;
import java.text.DecimalFormat;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.labels.StandardCategoryToolTipGenerator;
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.data.general.DatasetUtilities;
import org.jfree.ui.GradientPaintTransformType;
import org.jfree.ui.StandardGradientPaintTransformer;
import org.jfree.ui.TextAnchor;
import com.graph.myself.CylinderRenderer;

/**
 * 3D直方图例子
 * @author zengfantian 
 *
 */
public class BarChart3DCase {
	
	/**
	 * 获取数据集
	 * 
	 * @return CategoryDataset
	 */
	private  CategoryDataset getDataSet() {
		
		CategoryDataset dataset = new DefaultCategoryDataset();
		// 同一种类型的数据放在一个数组元素中
		final double[][] data = new double[][] { 
				{ 967, 1164, 1463, 1793, 1933 },
				{ 2164, 3063, 3955, 4031, 6749 },
				{ 1028, 1357, 1203, 1392, 2316 } };
		// 横向说明
		final String[] rowKeys = { "发明", "实用新型", "外观设计" };
		// 横向坐标值
		final String[] columnKeys = { "2006年", "2007年", "2008年", "2009年", "2010年" };
		
		//用DatasetUtilities来构建所需要的数据对象
		dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys,data);
		return dataset;
	}
	
	/**
	 * 创建图表JfreeChart对象
	 * @param dataset 数据集
	 * @param title 图表标题
	 * @return 图表JFreeChart
	 */
	private  JFreeChart createChart(CategoryDataset dataset,String title) {
		
		//用ChartFactory来构建所需的Chart对象
		JFreeChart chart = ChartFactory.createStackedBarChart3D(
				title,  //图表标题
				"",//横向标签 
				"",//纵向标签 
				dataset, //数据集
				PlotOrientation.VERTICAL, // 图表方向：水平、垂直, 
				true,//是否显示图例(对于简单的柱状图必须是false) 
				true, //
				false //是否生成URL链接
				);
		
		chart = this.setChart(chart);
	    
		return chart;
	}
	
	/**
	 * 对X轴的设置
	 * 
	 * @param domainAxis
	 */
	private  void setXDomainAxis(CategoryAxis domainAxis) {

		Font labelFont = new Font("宋体", Font.CENTER_BASELINE, 12);
		domainAxis.setLowerMargin(0.1);// 设置距离图片左端距离此时为10%
		domainAxis.setUpperMargin(0.1);// 设置距离图片右端距离此时为百分之10

		domainAxis.setLabelFont(labelFont);// X轴标题
		domainAxis.setTickLabelFont(labelFont);// X轴数值

		domainAxis.setCategoryLabelPositionOffset(10);// 图表横轴与标签的距离(10像素)
		domainAxis.setCategoryMargin(0.2);// 横轴标签之间的距离20%

		// domainAxis.setMaximumCategoryLabelLines(1);
		// domainAxis.setMaximumCategoryLabelWidthRatio(0);

		domainAxis.setLabelFont(labelFont);// 轴标题
		domainAxis.setTickLabelFont(labelFont);// 轴数值

		// Lable（Math.PI/3.0）倾斜度
		// domainAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 3.0));

		domainAxis.setMaximumCategoryLabelWidthRatio(0.6f);// 横轴上的 Lable 是否完整显示
	}

	
	/**
	  * 对Y轴的设置
	  *
	  * @param ValueAxis
	  */
	 private  void setYDomainAxis(ValueAxis valueAxis) {
	  Font labelFont = new Font("宋体", Font.CENTER_BASELINE, 12);
	  
	  valueAxis.setUpperMargin(0.1);// 设置最高的一个柱与图片顶端的距离(最高柱的10%)
	  valueAxis.setLowerMargin(0.15);// 设置最低的一个 Item 与图片底端的距离

	  valueAxis.setLabelFont(labelFont);// Y轴标题
	  valueAxis.setTickLabelFont(labelFont);// Y轴数值
	  // Lable水平显示
	  valueAxis.setLabelAngle(1.5);
	 
	 }
	

	/**
	 * 设置图表的颜色(渲染图表) 
	 * 每根柱子的详细设置(三维设置)
	 * 
	 * @param categoryPlot
	 */
	private void setRender(CategoryPlot plot) {

		// BarRenderer3D renderer = new BarRenderer3D(); //柱状渲染器
		CylinderRenderer renderer = new CylinderRenderer();//圆形渲染器
		renderer.setGradientPaintTransformer(new StandardGradientPaintTransformer(GradientPaintTransformType.CENTER_HORIZONTAL));
		renderer.setBaseOutlineStroke(new BasicStroke(0.3F));
		renderer.setBaseToolTipGenerator(new StandardCategoryToolTipGenerator());

		renderer.setBaseOutlinePaint(Color.red);// 边框颜色
		renderer.setSeriesPaint(0, new Color(155, 151, 255));// 设置柱的颜色

		renderer.setSeriesOutlinePaint(0, Color.BLACK);// 边框颜色
		renderer.setSeriesPaint(1, new Color(159, 49, 94));// 设置柱的颜色

		renderer.setSeriesOutlinePaint(0, Color.BLACK);// 边框颜色
		renderer.setSeriesPaint(2, new Color(253, 255, 199));// 设置柱的颜色

		renderer.setSeriesOutlinePaint(1, Color.red);// 边框为红色
		renderer.setItemMargin(0.1);// 组内柱子间隔为组宽的10%

		// 显示每个柱的数值，并修改该数值的字体属性
		renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
		// 注意：此句很关键，若无此句，那数字的显示会被覆盖，给人数字没有显示出来的问题(3D的才需啊这句，2D的上面那句足矣)
		renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(
				ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_CENTER));
		renderer.setBaseItemLabelPaint(Color.BLUE);// 设置数值颜色，默认黑色

		renderer.setIncludeBaseInRange(true);
		renderer.setBaseItemLabelFont((new Font("黑体", Font.CENTER_BASELINE, 12)));// 12号黑体

		renderer.setBaseItemLabelPaint(Color.black);// 字体为黑色
		renderer.setBaseItemLabelsVisible(true);

		// 设置柱子宽度
		renderer.setMaximumBarWidth(0.05);
		// 设置柱子高度
		renderer.setMinimumBarLength(0.2);

		// 设置柱子边框可见
		// renderer.setDrawBarOutline(true);

		// 使用我们设计的效果
		plot.setRenderer(renderer);

	}
	 
	 /**
	  * 设置图表属性
	  * @param chart 需要设置的图表
	  * @return JFreeChart设置好的图表
	  */
	 private JFreeChart setChart(JFreeChart chart){
		   //设置消除字体的锯齿渲染
			//chart.getRenderingHints().put(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF); 
		   // 设置Title和Legend的字体(不然会乱码)
		    chart.getTitle().setFont(new Font("宋体", Font.CENTER_BASELINE, 20));
			chart.getLegend().setItemFont(new Font("宋体", Font.CENTER_BASELINE, 12));
			
			// 获得图表区域对象
			CategoryPlot plot = chart.getCategoryPlot();
			
			//设置横虚线可见
			plot.setRangeGridlinesVisible(true);
			// 设置虚线色彩
			plot.setRangeGridlinePaint(Color.gray);
		    // 设置柱图背景色
		    plot.setBackgroundPaint(Color.white);
		    // 设置纵横坐标的显示位置
		    plot.setDomainAxisLocation(AxisLocation.BOTTOM_OR_LEFT);
		    plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);
		   
		    // 数据轴精度
		    NumberAxis vn = (NumberAxis) plot.getRangeAxis();
		    // 设置刻度必须从0开始 
		    vn.setAutoRangeIncludesZero(true);
		    // 数据轴数据标签的显示格式
		    DecimalFormat df = new DecimalFormat("#0");
		    vn.setNumberFormatOverride(df); 

		    // 设置图表的横轴（X轴）
		    CategoryAxis domainAxis = plot.getDomainAxis();
		    this.setXDomainAxis(domainAxis);
			
		    // 设置图表的纵轴（Y轴）
		    ValueAxis valueAxis = plot.getRangeAxis();
		    this.setYDomainAxis(valueAxis);
			
		    // 设置图表的颜色
		    this.setRender(plot);
		    
		    return chart;
	 }
	 
	 /**
	  * 将图表保存到指定的路径
	  * @param filePath 图片文件保存路径
	  * @param chart 需要保存的图表
	  * @param width 图片的宽度
	  * @param height 图片高度
	  */
	 @SuppressWarnings("unused")
	private void saveChartAsJPG(String filePath, JFreeChart chart, int width,int height) {
		try {
			File file = new File(filePath);
			ChartUtilities.saveChartAsJPEG(file, chart, width, height);
			System.out.println("图表已生成到：" + filePath);
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	 }

	 /**
	  * 在窗体中显示生成的图表
	  * @param chart 需要显示的图表
	  * @param frameTitle 窗体标题
	  */
	 private void displayChart(JFreeChart chart,String frameTitle) {
		// 将生成的报表放到预览窗口中
		ChartFrame preview = new ChartFrame(frameTitle, chart);
		preview.pack();
		preview.setLocationRelativeTo(null);
		preview.setVisible(true);
	 }
	
	 
	/**
	 * 测试函数
	 * @param args
	 */
	public static void main(String[] args) {
		BarChart3DCase barChartcase = new BarChart3DCase();
		CategoryDataset dataset = barChartcase.getDataSet();
		JFreeChart chart = barChartcase.createChart(dataset,"“十一五”时期天津市三种类型专利授权量");
		barChartcase.displayChart(chart,"“十一五”时期天津市三种类型专利授权量");
		//barChartcase.saveChartAsJPG("C:/jfreechartdemo/s.jpg", chart, 400, 300);
	}

}

 

 

CylinderRenderer.java（该类jfreechart的官方demo源码中有）

 

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 

package com.graph.myself;

import java.awt.GradientPaint;
import java.awt.Graphics2D;
import java.awt.geom.*;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.CategoryItemEntity;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.labels.CategoryToolTipGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.chart.renderer.category.CategoryItemRendererState;
import org.jfree.chart.urls.CategoryURLGenerator;
import org.jfree.data.category.CategoryDataset;
import org.jfree.ui.GradientPaintTransformer;

public class CylinderRenderer extends BarRenderer3D
{

	public CylinderRenderer()
	{
	}

	public CylinderRenderer(double d, double d1)
	{
		super(d, d1);
	}

	public void drawItem(Graphics2D graphics2d, CategoryItemRendererState categoryitemrendererstate, Rectangle2D rectangle2d, CategoryPlot categoryplot, CategoryAxis categoryaxis, ValueAxis valueaxis, CategoryDataset categorydataset, 
			int i, int j, int k)
	{
		Number number = categorydataset.getValue(i, j);
		if (number == null)
			return;
		double d = number.doubleValue();
		java.awt.geom.Rectangle2D.Double double1 = new java.awt.geom.Rectangle2D.Double(rectangle2d.getX(), rectangle2d.getY() + getYOffset(), rectangle2d.getWidth() - getXOffset(), rectangle2d.getHeight() - getYOffset());
		PlotOrientation plotorientation = categoryplot.getOrientation();
		double d1 = calculateBarW0(categoryplot, plotorientation, double1, categoryaxis, categoryitemrendererstate, i, j);
		double ad[] = calculateBarL0L1(d);
		if (ad == null)
			return;
		org.jfree.ui.RectangleEdge rectangleedge = categoryplot.getRangeAxisEdge();
		float f = (float)valueaxis.valueToJava2D(ad[0], double1, rectangleedge);
		float f1 = (float)valueaxis.valueToJava2D(ad[1], double1, rectangleedge);
		float f2 = Math.min(f, f1);
		float f3 = Math.abs(f1 - f);
		GeneralPath generalpath = new GeneralPath();
		java.awt.geom.Ellipse2D.Double double2 = null;
		if (plotorientation == PlotOrientation.HORIZONTAL)
		{
			generalpath.moveTo((float)((double)f2 + getXOffset() / 2D), (float)d1);
			generalpath.lineTo((float)((double)(f2 + f3) + getXOffset() / 2D), (float)d1);
			java.awt.geom.Arc2D.Double double3 = new java.awt.geom.Arc2D.Double(f2 + f3, d1, getXOffset(), categoryitemrendererstate.getBarWidth(), 90D, 180D, 0);
			generalpath.append(double3, true);
			generalpath.lineTo((float)((double)f2 + getXOffset() / 2D), (float)(d1 + categoryitemrendererstate.getBarWidth()));
			double3 = new java.awt.geom.Arc2D.Double(f2, d1, getXOffset(), categoryitemrendererstate.getBarWidth(), 270D, -180D, 0);
			generalpath.append(double3, true);
			generalpath.closePath();
			double2 = new java.awt.geom.Ellipse2D.Double(f2 + f3, d1, getXOffset(), categoryitemrendererstate.getBarWidth());
		} else
		{
			generalpath.moveTo((float)d1, (float)((double)f2 - getYOffset() / 2D));
			generalpath.lineTo((float)d1, (float)((double)(f2 + f3) - getYOffset() / 2D));
			java.awt.geom.Arc2D.Double double4 = new java.awt.geom.Arc2D.Double(d1, (double)(f2 + f3) - getYOffset(), categoryitemrendererstate.getBarWidth(), getYOffset(), 180D, 180D, 0);
			generalpath.append(double4, true);
			generalpath.lineTo((float)(d1 + categoryitemrendererstate.getBarWidth()), (float)((double)f2 - getYOffset() / 2D));
			double4 = new java.awt.geom.Arc2D.Double(d1, (double)f2 - getYOffset(), categoryitemrendererstate.getBarWidth(), getYOffset(), 0.0D, -180D, 0);
			generalpath.append(double4, true);
			generalpath.closePath();
			double2 = new java.awt.geom.Ellipse2D.Double(d1, (double)f2 - getYOffset(), categoryitemrendererstate.getBarWidth(), getYOffset());
		}
		Object obj = getItemPaint(i, j);
		if (getGradientPaintTransformer() != null && (obj instanceof GradientPaint))
		{
			GradientPaint gradientpaint = (GradientPaint)obj;
			obj = getGradientPaintTransformer().transform(gradientpaint, generalpath);
		}
		graphics2d.setPaint(((java.awt.Paint) (obj)));
		graphics2d.fill(generalpath);
		if (obj instanceof GradientPaint)
			graphics2d.setPaint(((GradientPaint)obj).getColor2());
		if (double2 != null)
			graphics2d.fill(double2);
		if (isDrawBarOutline() && categoryitemrendererstate.getBarWidth() > 3D)
		{
			graphics2d.setStroke(getItemOutlineStroke(i, j));
			graphics2d.setPaint(getItemOutlinePaint(i, j));
			graphics2d.draw(generalpath);
			if (double2 != null)
				graphics2d.draw(double2);
		}
		org.jfree.chart.labels.CategoryItemLabelGenerator categoryitemlabelgenerator = getItemLabelGenerator(i, j);
		if (categoryitemlabelgenerator != null && isItemLabelVisible(i, j))
			drawItemLabel(graphics2d, categorydataset, i, j, categoryplot, categoryitemlabelgenerator, generalpath.getBounds2D(), d < 0.0D);
		if (categoryitemrendererstate.getInfo() != null)
		{
			EntityCollection entitycollection = categoryitemrendererstate.getEntityCollection();
			if (entitycollection != null)
			{
				String s = null;
				CategoryToolTipGenerator categorytooltipgenerator = getToolTipGenerator(i, j);
				if (categorytooltipgenerator != null)
					s = categorytooltipgenerator.generateToolTip(categorydataset, i, j);
				String s1 = null;
				if (getItemURLGenerator(i, j) != null)
					s1 = getItemURLGenerator(i, j).generateURL(categorydataset, i, j);
				CategoryItemEntity categoryitementity = new CategoryItemEntity(generalpath.getBounds2D(), s, s1, categorydataset, categorydataset.getRowKey(i), categorydataset.getColumnKey(j));
				entitycollection.add(categoryitementity);
			}
		}
	}
}

 

 

效果图：

 

 

 希望本文对研究JfreeChart圆柱状图的朋友们有帮助。（需要官方开发文档、官方demo源码或是对jfreeChart有兴趣的朋友可以留下邮箱，我会把我搜集的jfreeChart研究资料发送至邮箱）

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