java利用JFreeChart实现各种数据统计图(柱形图,饼图,折线图)

jopen 12年前

最近在做数据挖掘的课程设计,需要将数据分析的结果很直观的展现给用户,这就要用到数据统计图,要实现这个功能就需要几个第三方包了:

1.       jfreechart-1.0.13.jar

2.       jcommon-1.0.16.jar

3.       gnujaxp.jar

 

先来看一下,最终效果图:

 

主要是jfreechart-1.0.13.jar,但这三个包要齐全,我已经将所有与jfreechart有关的jar包与本文实例的工程(代码)一同压缩上传了,有兴趣的同学可以下载,

下载地址:http://download.csdn.net/detail/pzhtpf/4327700

 

接下来,我们一步步来实现本程序。

 

一,前期准备工作,也就把这三个第三方包添加进本文工程,添加过程特别简单,前面写过一篇博客,讲的是java如何读取Excel表格中的数据(有兴趣的同学可以看一看:http://blog.csdn.net/pzhtpf/article/details/7506135),也要添加第三方包,添加过程一模一样,这里我们在复习一遍:

1 ,java项目,在这个项目在建立一个新的文件夹lib

2 将上述三个jar包,复制到lib

3然后右键点击这个java项目,选择Properties

4在左侧列表里选中Java Build Path,右侧选中Libraries

5点击Add JARs

6 然后去选择这个项目中lib文件夹中的三个jar,点击确定

成功后,项目中会多一个文件夹为:Referenced Libraries

 

二, 实现柱形图的java代码:

  import java.awt.Font;    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.ValueAxis;  import org.jfree.chart.plot.CategoryPlot;  import org.jfree.chart.plot.PlotOrientation;  import org.jfree.data.category.CategoryDataset;  import org.jfree.data.category.DefaultCategoryDataset;    public class BarChart {   ChartPanel frame1;   public  BarChart(){    CategoryDataset dataset = getDataSet();          JFreeChart chart = ChartFactory.createBarChart3D(                            "水果", // 图表标题                              "水果种类", // 目录轴的显示标签                              "数量", // 数值轴的显示标签                              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)                              false,          // 是否生成工具                              false           // 是否生成URL链接                              );                    //从这里开始          CategoryPlot plot=chart.getCategoryPlot();//获取图表区域对象          CategoryAxis domainAxis=plot.getDomainAxis();         //水平底部列表           domainAxis.setLabelFont(new Font("黑体",Font.BOLD,14));         //水平底部标题           domainAxis.setTickLabelFont(new Font("宋体",Font.BOLD,12));  //垂直标题           ValueAxis rangeAxis=plot.getRangeAxis();//获取柱状           rangeAxis.setLabelFont(new Font("黑体",Font.BOLD,15));            chart.getLegend().setItemFont(new Font("黑体", Font.BOLD, 15));            chart.getTitle().setFont(new Font("宋体",Font.BOLD,20));//设置标题字体                        //到这里结束,虽然代码有点多,但只为一个目的,解决汉字乱码问题                       frame1=new ChartPanel(chart,true);        //这里也可以用chartFrame,可以直接生成一个独立的Frame              }      private static CategoryDataset getDataSet() {             DefaultCategoryDataset dataset = new DefaultCategoryDataset();             dataset.addValue(100, "北京", "苹果");             dataset.addValue(100, "上海", "苹果");             dataset.addValue(100, "广州", "苹果");             dataset.addValue(200, "北京", "梨子");             dataset.addValue(200, "上海", "梨子");             dataset.addValue(200, "广州", "梨子");             dataset.addValue(300, "北京", "葡萄");             dataset.addValue(300, "上海", "葡萄");             dataset.addValue(300, "广州", "葡萄");             dataset.addValue(400, "北京", "香蕉");             dataset.addValue(400, "上海", "香蕉");             dataset.addValue(400, "广州", "香蕉");             dataset.addValue(500, "北京", "荔枝");             dataset.addValue(500, "上海", "荔枝");             dataset.addValue(500, "广州", "荔枝");             return dataset;  }  public ChartPanel getChartPanel(){   return frame1;     }  }


 

效果图如下:

 

但我们把private static CategoryDataset getDataSet(){}方法中的数据变化一下后,又会形成另一种效果,比如说我们改成:

private static CategoryDataset getDataSet() {             DefaultCategoryDataset dataset = new DefaultCategoryDataset();             dataset.addValue(100, "苹果", "苹果");             dataset.addValue(200, "梨子", "梨子");             dataset.addValue(300, "葡萄", "葡萄");             dataset.addValue(400, "香蕉", "香蕉");             dataset.addValue(500, "荔枝", "荔枝");             return dataset;  }


 

效果图如下:

 

三,    实现饼状图的java代码:

 package com.njue.testJFreeChart;    import java.awt.Font;  import java.text.DecimalFormat;  import java.text.NumberFormat;    import javax.swing.JPanel;    import org.jfree.chart.ChartFactory;  import org.jfree.chart.ChartPanel;  import org.jfree.chart.JFreeChart;  import org.jfree.chart.labels.StandardPieSectionLabelGenerator;  import org.jfree.chart.plot.PiePlot;  import org.jfree.data.general.DefaultPieDataset;    public class PieChart {   ChartPanel frame1;   public PieChart(){      DefaultPieDataset data = getDataSet();         JFreeChart chart = ChartFactory.createPieChart3D("水果产量",data,true,false,false);       //设置百分比         PiePlot pieplot = (PiePlot) chart.getPlot();         DecimalFormat df = new DecimalFormat("0.00%");//获得一个DecimalFormat对象,主要是设置小数问题         NumberFormat nf = NumberFormat.getNumberInstance();//获得一个NumberFormat对象         StandardPieSectionLabelGenerator sp1 = new StandardPieSectionLabelGenerator("{0}  {2}", nf, df);//获得StandardPieSectionLabelGenerator对象         pieplot.setLabelGenerator(sp1);//设置饼图显示百分比          //没有数据的时候显示的内容         pieplot.setNoDataMessage("无数据显示");         pieplot.setCircular(false);         pieplot.setLabelGap(0.02D);              pieplot.setIgnoreNullValues(true);//设置不显示空值         pieplot.setIgnoreZeroValues(true);//设置不显示负值        frame1=new ChartPanel (chart,true);         chart.getTitle().setFont(new Font("宋体",Font.BOLD,20));//设置标题字体         PiePlot piePlot= (PiePlot) chart.getPlot();//获取图表区域对象         piePlot.setLabelFont(new Font("宋体",Font.BOLD,10));//解决乱码         chart.getLegend().setItemFont(new Font("黑体",Font.BOLD,10));   }      private static DefaultPieDataset getDataSet() {          DefaultPieDataset dataset = new DefaultPieDataset();          dataset.setValue("苹果",100);          dataset.setValue("梨子",200);          dataset.setValue("葡萄",300);          dataset.setValue("香蕉",400);          dataset.setValue("荔枝",500);          return dataset;  }      public ChartPanel getChartPanel(){       return frame1;             }  }


 

效果图如下:

 

四,      实现折线图的java代码:

 

package com.njue.testJFreeChart;    import java.awt.Font;  import java.text.SimpleDateFormat;    import org.jfree.chart.ChartFactory;  import org.jfree.chart.ChartPanel;  import org.jfree.chart.JFreeChart;  import org.jfree.chart.axis.DateAxis;  import org.jfree.chart.axis.ValueAxis;  import org.jfree.chart.plot.XYPlot;  import org.jfree.data.time.Month;  import org.jfree.data.time.TimeSeries;  import org.jfree.data.time.TimeSeriesCollection;  import org.jfree.data.xy.XYDataset;    public class TimeSeriesChart {   ChartPanel frame1;   public TimeSeriesChart(){    XYDataset xydataset = createDataset();    JFreeChart jfreechart = ChartFactory.createTimeSeriesChart("Legal & General单位信托基金价格", "日期", "价格",xydataset, true, true, true);    XYPlot xyplot = (XYPlot) jfreechart.getPlot();    DateAxis dateaxis = (DateAxis) xyplot.getDomainAxis();          dateaxis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy"));          frame1=new ChartPanel(jfreechart,true);          dateaxis.setLabelFont(new Font("黑体",Font.BOLD,14));         //水平底部标题          dateaxis.setTickLabelFont(new Font("宋体",Font.BOLD,12));  //垂直标题          ValueAxis rangeAxis=xyplot.getRangeAxis();//获取柱状          rangeAxis.setLabelFont(new Font("黑体",Font.BOLD,15));          jfreechart.getLegend().setItemFont(new Font("黑体", Font.BOLD, 15));          jfreechart.getTitle().setFont(new Font("宋体",Font.BOLD,20));//设置标题字体     }     private static XYDataset createDataset() {  //这个数据集有点多,但都不难理解           TimeSeries timeseries = new TimeSeries("legal & general欧洲指数信任",                   org.jfree.data.time.Month.class);           timeseries.add(new Month(2, 2001), 181.80000000000001D);           timeseries.add(new Month(3, 2001), 167.30000000000001D);           timeseries.add(new Month(4, 2001), 153.80000000000001D);           timeseries.add(new Month(5, 2001), 167.59999999999999D);           timeseries.add(new Month(6, 2001), 158.80000000000001D);           timeseries.add(new Month(7, 2001), 148.30000000000001D);           timeseries.add(new Month(8, 2001), 153.90000000000001D);           timeseries.add(new Month(9, 2001), 142.69999999999999D);           timeseries.add(new Month(10, 2001), 123.2D);           timeseries.add(new Month(11, 2001), 131.80000000000001D);           timeseries.add(new Month(12, 2001), 139.59999999999999D);           timeseries.add(new Month(1, 2002), 142.90000000000001D);           timeseries.add(new Month(2, 2002), 138.69999999999999D);           timeseries.add(new Month(3, 2002), 137.30000000000001D);           timeseries.add(new Month(4, 2002), 143.90000000000001D);           timeseries.add(new Month(5, 2002), 139.80000000000001D);           timeseries.add(new Month(6, 2002), 137D);           timeseries.add(new Month(7, 2002), 132.80000000000001D);           TimeSeries timeseries1 = new TimeSeries("legal & general英国指数信任",                   org.jfree.data.time.Month.class);           timeseries1.add(new Month(2, 2001), 129.59999999999999D);           timeseries1.add(new Month(3, 2001), 123.2D);           timeseries1.add(new Month(4, 2001), 117.2D);           timeseries1.add(new Month(5, 2001), 124.09999999999999D);           timeseries1.add(new Month(6, 2001), 122.59999999999999D);           timeseries1.add(new Month(7, 2001), 119.2D);           timeseries1.add(new Month(8, 2001), 116.5D);           timeseries1.add(new Month(9, 2001), 112.7D);           timeseries1.add(new Month(10, 2001), 101.5D);           timeseries1.add(new Month(11, 2001), 106.09999999999999D);           timeseries1.add(new Month(12, 2001), 110.3D);           timeseries1.add(new Month(1, 2002), 111.7D);           timeseries1.add(new Month(2, 2002), 111D);           timeseries1.add(new Month(3, 2002), 109.59999999999999D);           timeseries1.add(new Month(4, 2002), 113.2D);           timeseries1.add(new Month(5, 2002), 111.59999999999999D);           timeseries1.add(new Month(6, 2002), 108.8D);           timeseries1.add(new Month(7, 2002), 101.59999999999999D);           TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();           timeseriescollection.addSeries(timeseries);           timeseriescollection.addSeries(timeseries1);           return timeseriescollection;       }     public ChartPanel getChartPanel(){        return frame1;               }  }


 

效果图如下:

 

再来看一下主方法

import java.awt.GridLayout;    import javax.swing.JFrame;    public class mainClass {  public static void main(String args[]){   JFrame frame=new JFrame("Java数据统计图");   frame.setLayout(new GridLayout(2,2,10,10));   frame.add(new BarChart().getChartPanel());           //添加柱形图   frame.add(new BarChart1().getChartPanel());          //添加柱形图的另一种效果   frame.add(new PieChart().getChartPanel());           //添加饼状图   frame.add(new TimeSeriesChart().getChartPanel());    //添加折线图   frame.setBounds(50, 50, 800, 600);   frame.setVisible(true);  }  }


 

五,             总结

 

以上都是一个简单的例子去实现了,想了解更深的同学可自行查询资料,其实以上代码都通俗易懂,只要结合自己的实际情况,便可开发出属于自己的Application,大家可以看出我这里是在Application上实现的,其实更多情况数据统计图在javaweb上应用更多,大家也可自行了解。

ps:如运行本文工程项目是出现错误,请参考博文:http://blog.csdn.net/pzhtpf/article/details/7506135

 

转自:http://blog.csdn.net/pzhtpf/article/details/7600100