学步园

版本JFreeChart 1.0.12

代码如下：

// $Id: ChartServiceImpl.java, v1.0 2010-1-15 下午06:56:24 wuyao Exp $<br /> package com.owen.chart.mine;<br /> import java.awt.Color;<br /> import java.awt.Font;<br /> import java.awt.GradientPaint;<br /> import java.awt.Paint;<br /> import java.io.IOException;<br /> import java.io.OutputStream;<br /> import java.text.DecimalFormat;<br /> import java.text.NumberFormat;<br /> import org.jfree.chart.ChartFactory;<br /> import org.jfree.chart.ChartUtilities;<br /> import org.jfree.chart.JFreeChart;<br /> import org.jfree.chart.axis.CategoryAxis;<br /> import org.jfree.chart.axis.NumberAxis;<br /> import org.jfree.chart.axis.ValueAxis;<br /> import org.jfree.chart.block.BlockContainer;<br /> import org.jfree.chart.block.BorderArrangement;<br /> import org.jfree.chart.block.LabelBlock;<br /> import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;<br /> import org.jfree.chart.labels.StandardPieSectionLabelGenerator;<br /> import org.jfree.chart.plot.CategoryPlot;<br /> import org.jfree.chart.plot.PiePlot;<br /> import org.jfree.chart.plot.PiePlot3D;<br /> import org.jfree.chart.plot.PlotOrientation;<br /> import org.jfree.chart.renderer.category.BarRenderer;<br /> import org.jfree.chart.title.LegendTitle;<br /> import org.jfree.chart.title.TextTitle;<br /> import org.jfree.data.category.CategoryDataset;<br /> import org.jfree.data.general.PieDataset;<br /> import org.jfree.ui.RectangleEdge;<br /> import org.jfree.ui.VerticalAlignment;<br /> import org.jfree.util.Rotation;<br /> /**<br /> *<br /> * @author wuyao;<br /> * @version 1.0, $Revision: 1.0 $, $Date: 2010-1-15 下午06:56:24 $<br /> */<br /> public class ChartServiceImpl {<br /> public JFreeChart createBarChart(CategoryDataset dataset, String title,<br /> String catAxisLabel, String valAxisLabel) {<br /> // if no dataset, don't generate chart<br /> if(dataset == null) return null; </p> <p> JFreeChart chart = ChartFactory.createBarChart(title, // char title<br /> catAxisLabel, // categoryAxisLabel<br /> valAxisLabel, // valueAxisLabel<br /> dataset, // the dataset for the chart<br /> PlotOrientation.VERTICAL, //<br /> false, // legend if is needed<br /> false, // tooltips if is needed<br /> false // urls<br /> );<br /> //<br /> customizeBarChart(chart);<br /> //</p> <p> return chart;<br /> }<br /> public JFreeChart createPieChart(PieDataset dataset, String title) {<br /> // if no dataset, don't generate chart<br /> if(dataset == null) return null; </p> <p> JFreeChart chart = ChartFactory.createPieChart(title, // chart title<br /> dataset, // data<br /> true, // include legend<br /> true, // include tooltip<br /> false);<br /> // customize the chart<br /> customizePieChart(chart);<br /> // customize for pie<br /> PiePlot plot = (PiePlot) chart.getPlot();<br /> plot.setSectionOutlinesVisible(true);<br /> plot.setNoDataMessage("No data available");<br /> return chart;<br /> }</p> <p> public JFreeChart create3DBarChart(CategoryDataset dataset, String title,<br /> String catAxisLabel, String valAxisLabel) {<br /> // if no dataset, don't generate chart<br /> if(dataset == null) return null; </p> <p> JFreeChart chart = ChartFactory.createBarChart3D(title, // 图表标题<br /> catAxisLabel, // 目录轴的显示标签<br /> valAxisLabel, // 数值轴的显示标签<br /> dataset, // 数据集<br /> PlotOrientation.VERTICAL, // 图表方向：水平、垂直<br /> false, // 是否显示图例(对于简单的柱状图必须是false)<br /> false, // 是否生成工具<br /> false // 是否生成URL链接<br /> );<br /> // basic customization<br /> customizeBarChart(chart);</p> <p> // additional customization</p> <p> return chart;<br /> }<br /> public JFreeChart create3DPieChart(PieDataset dataset, String title) {<br /> // if no dataset, don't generate chart<br /> if(dataset == null) return null; </p> <p> JFreeChart chart = ChartFactory.createPieChart3D(title, // chart title<br /> dataset, // data<br /> true, // include legend<br /> true, // incluse tooltip<br /> false);<br /> // customize the font of the chart<br /> customizePieChart(chart);<br /> // additional customize for 3D effect<br /> PiePlot3D plot = (PiePlot3D) chart.getPlot();<br /> plot.setStartAngle(290);<br /> plot.setDirection(Rotation.CLOCKWISE);<br /> plot.setForegroundAlpha(0.5f);<br /> return chart;<br /> }<br /> /**<br /> * Customize the pie chart, such as adjust font, legend.<br /> * @param chart<br /> */<br /> private void customizePieChart(JFreeChart chart) {<br /> // 定义整张图片的背景颜色: GradientPaint渐变色<br /> Paint bgPaint = new GradientPaint(50, 0, new Color(0xD1DEEF), 50, 700, new Color(0xFFFFFF));<br /> chart.setBackgroundPaint(bgPaint); // set chart bg<br /> chart.setBorderPaint(Color.GREEN);<br /> chart.setBorderVisible(false); // set chart border, true in debug mode</p> <p> PiePlot plot = (PiePlot) chart.getPlot(); // 获取饼图图表区域<br /> plot.setBackgroundPaint(bgPaint); // 设置图表区域背景颜色<br /> plot.setBackgroundAlpha(0.0f); // 设置此区域背景色透明度<br /> plot.setOutlineVisible(false); // 设置是否显示边框,true in debug mode</p> <p> plot.setNoDataMessage("无对应的数据，请重新查询。");<br /> // 设置中文字体<br /> Font titleFont = new Font("宋体", Font.PLAIN, 14); // 图表标题字体<br /> Font contentFont = new Font("宋体", Font.PLAIN, 12); // 图表内容字体<br /> Font legendFont = new Font("宋体", Font.PLAIN, 12); // 图例字体<br /> // 设置图表标题属性<br /> TextTitle title = chart.getTitle();<br /> title.setFont(titleFont);<br /> title.setMargin(10, 0, 0, 0);<br /> // 设置图表内容字体<br /> plot.setLabelFont(contentFont);<br /> /*<br /> * 是标签格式（默认是“{0} = {1}”这样是显示数据），<br /> * {0}是类别名，{1}是实际数据，后面的{2}是百分比。<br /> */<br /> String unitSytle = "{0}: {1}({2})"; // {2}</p> <p> // 设置图表图例字体和位置<br /> LegendTitle legend = chart.getLegend();<br /> if (legend != null) {<br /> legend.setItemFont(legendFont);<br /> legend.setPosition(RectangleEdge.RIGHT);<br /> legend.setVerticalAlignment(VerticalAlignment.TOP);<br /> legend.setBackgroundPaint(bgPaint);<br /> legend.setBorder(0.0, 0, 0.0, 0); // (0.5, 0, 0.5, 0) in test mode</p> <p> // 为图例添加描述信息<br /> LabelBlock labelblock = new LabelBlock("图例:", legendFont);<br /> BlockContainer blockcontainer = new BlockContainer(<br /> new BorderArrangement());<br /> blockcontainer.add(labelblock, RectangleEdge.TOP);<br /> // 添加图例本身<br /> BlockContainer itemContainer = legend.getItemContainer();<br /> blockcontainer.add(itemContainer);<br /> legend.setWrapper(blockcontainer);<br /> // </p> <p> } </p> <p> //引出标签显示样式，在图表上显示比例<br /> plot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}({2})"/*unitSytle*/,<br /> NumberFormat.getNumberInstance(),<br /> new DecimalFormat("0.00%"))); </p> <p> //图例显示样式<br /> plot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,<br /> NumberFormat.getNumberInstance(),<br /> new DecimalFormat("0.00%")));<br /> }<br /> /**<br /> * Customize bar chart for font, background<br /> * @param chart<br /> */<br /> private void customizeBarChart(JFreeChart chart) {<br /> // 定义整张图片的背景颜色: GradientPaint渐变色<br /> Paint bgPaint = new GradientPaint(50, 0, new Color(0xD1DEEF), 50, 700, new Color(0xFFFFFF));<br /> chart.setBackgroundPaint(bgPaint); // set chart bg<br /> chart.setBorderPaint(Color.GREEN);<br /> chart.setBorderVisible(false); // set chart border, true in debug mode </p> <p> // 设置图表区域<br /> CategoryPlot cplot = chart.getCategoryPlot(); // 获取饼图图表区域<br /> cplot.setBackgroundAlpha(0.0f); // 设置此区域背景色透明度<br /> cplot.setOutlineVisible(false); // 设置是否显示边框,true in debug mode</p> <p> // solve Chinese character messy code of chart title.<br /> Font titleFont = new Font("宋体", Font.PLAIN, 14);<br /> Font xyTitleFont = new Font("宋体", Font.PLAIN, 12);<br /> Font xyCoordFont = new Font("宋体", Font.PLAIN, 12);<br /> Font legendFont = new Font("宋体", Font.PLAIN, 12);<br /> Font contentFont = new Font("宋体", Font.PLAIN, 12);</p> <p> // 设置图表标题属性<br /> TextTitle title = chart.getTitle();<br /> title.setFont(titleFont);<br /> title.setMargin(15, 0, 10, 0);<br /> //<br /> CategoryAxis axis = cplot.getDomainAxis();<br /> // Set font on X-axis title 设置X坐标轴上标题字体<br /> axis.setLabelFont(xyTitleFont);<br /> // Set font on X-axis coordinate， 设置X坐标轴上刻度字体<br /> axis.setTickLabelFont(xyCoordFont);<br /> //<br /> ValueAxis vAxis = cplot.getRangeAxis();<br /> // set the Y-axis title font<br /> vAxis.setLabelFont(xyTitleFont);<br /> // set the Y-axis coordinate title font<br /> vAxis.setTickLabelFont(xyCoordFont);</p> <p> vAxis.setUpperMargin(0.1); // 设置最高柱子离顶端的间距<br /> // 设置Y轴坐标间距<br /> NumberAxis numAxis = (NumberAxis)cplot.getRangeAxis();<br /> numAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());</p> <p> // set legend font 如果有图例，设置其字体和位置<br /> LegendTitle legend = chart.getLegend();<br /> if (legend != null) {<br /> legend.setItemFont(legendFont);<br /> legend.setPosition(RectangleEdge.RIGHT);<br /> }</p> <p> // 设置图标属性<br /> // change the color of the chart<br /> cplot.setBackgroundPaint(new Color(212, 225, 241));<br /> cplot.setDomainGridlinePaint(Color.GRAY); // 设置表中竖参考线的颜色<br /> cplot.setDomainGridlinesVisible(true); // 设置竖参考线是否显示<br /> // 设置横参考线属性<br /> cplot.setRangeGridlinePaint(Color.BLUE);<br /> cplot.setRangeGridlinesVisible(true);<br /> cplot.setForegroundAlpha(1.0f); // 设置前景透明度(1.0f不透明)<br /> BarRenderer crender = (BarRenderer) cplot.getRenderer(); //new BarRenderer();<br /> // 设置柱子的形状属性<br /> crender.setSeriesPaint(0, Color.BLUE); // 柱子颜色: 绿色new Color(0x3882EF),new Color(0x7170F0)<br /> crender.setMaximumBarWidth(0.15); // 设置柱子宽度<br /> // 设置显示柱子显示数据<br /> crender.setSeriesItemLabelGenerator(0, new StandardCategoryItemLabelGenerator());<br /> crender.setSeriesItemLabelFont(0, contentFont);<br /> crender.setSeriesItemLabelsVisible(0, true);</p> <p> }<br /> /**<br /> * 产生柱子的数据显示<br /> * @author wuyao<br /> *<br /> */<br /> static class LabelGenerator extends StandardCategoryItemLabelGenerator {<br /> /**<br /> *<br /> */<br /> private static final long serialVersionUID = 7335548557126787550L;<br /> public String generateItemLabel(CategoryDataset categorydataset, int i,<br /> int j) {<br /> return categorydataset.getRowKey(i).toString();<br /> }<br /> LabelGenerator() {<br /> }<br /> }<br /> /**<br /> * Just for testing<br /> * @param chart<br /> * @param out<br /> */<br /> public void writeChart(JFreeChart chart, OutputStream out) {<br /> try {<br /> ChartUtilities.writeChartAsJPEG(out, 1.0f, chart, 800, 600, null);<br /> } catch (IOException e) {<br /> // just throw it, or throw to high level Exception<br /> throw new RuntimeException(e);<br /> } finally {<br /> try {<br /> out.close();<br /> } catch (IOException e) {<br /> // just throw it, or throw to high level Exception<br /> throw new RuntimeException(e);<br /> }<br /> }<br /> }<br /> }<br />

一个简单的测试：

// $Id: ChartServiceTest.java, v1.0 2010-1-15 下午07:04:37 wuyao Exp $<br /> package com.owen.chart.mine;<br /> import java.io.FileNotFoundException;<br /> import java.io.FileOutputStream;<br /> import java.io.IOException;<br /> import org.jfree.chart.JFreeChart;<br /> import org.jfree.data.category.CategoryDataset;<br /> import org.jfree.data.category.DefaultCategoryDataset;<br /> import org.jfree.data.general.DefaultPieDataset;<br /> import org.jfree.data.general.PieDataset;<br /> /**<br /> *<br /> * @author wuyao;<br /> * @version 1.0, $Revision: 1.0 $, $Date: 2010-1-15 下午07:04:37 $<br /> */<br /> public class ChartServiceTest {<br /> public static void main(String[] args) throws IOException {<br /> ChartServiceImpl chartService = new ChartServiceImpl();<br /> ChartServiceTest test = new ChartServiceTest();<br /> // test pie chart<br /> PieDataset pieDataset = test.createPieDataset();<br /> JFreeChart pieChart = chartService.createPieChart(pieDataset,<br /> "pie chart测试");<br /> FileOutputStream pieOut = new FileOutputStream(<br /> "C://Users//wuyao//Desktop//pieOut.jpg");<br /> chartService.writeChart(pieChart, pieOut);<br /> // test bar chart<br /> CategoryDataset barDataset = test.createBarDataset();<br /> JFreeChart barChart = chartService.createBarChart(barDataset,<br /> "bar chart测试", "水果", "产量");<br /> FileOutputStream barOut = new FileOutputStream(<br /> "C://Users//wuyao//Desktop//barOut.jpg");<br /> chartService.writeChart(barChart, barOut);<br /> }<br /> private PieDataset createPieDataset() {<br /> DefaultPieDataset result = new DefaultPieDataset();<br /> result.setValue("Linux系统", 35);<br /> result.setValue("Mac系统", 20);<br /> result.setValue("Windows系统", 68);<br /> return result;<br /> }<br /> private CategoryDataset createBarDataset() {<br /> DefaultCategoryDataset dataset = new DefaultCategoryDataset();<br /> dataset.setValue(23.4f, "重庆", "橘子");<br /> dataset.setValue(53.2f, "重庆", "苹果");<br /> dataset.setValue(34.9f, "重庆", "葡萄");<br /> dataset.setValue(65.6f, "重庆", "香蕉");<br /> dataset.setValue(29.1f, "重庆", "核桃");<br /> return dataset;<br /> }<br /> }<br />