java利用JFreeChart实现各种数据统计图柱形图饼图折线图.docx
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java利用JFreeChart实现各种数据统计图柱形图饼图折线图
java利用JFreeChart实现各种数据统计图(柱形图,饼图,折线图)
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:
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:
1, 建,立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JavaBuildPath,右侧选中Libraries
5,点击AddJARs
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:
ReferencedLibraries
二, 实现柱形图的java代码:
importjava.awt.Font;
importorg.jfree.chart.ChartFactory;
importorg.jfree.chart.ChartPanel;
importorg.jfree.chart.JFreeChart;
importorg.jfree.chart.axis.CategoryAxis;
importorg.jfree.chart.axis.ValueAxis;
importorg.jfree.chart.plot.CategoryPlot;
importorg.jfree.chart.plot.PlotOrientation;
importorg.jfree.data.category.CategoryDataset;
importorg.jfree.data.category.DefaultCategoryDataset;
publicclassBarChart{
ChartPanelframe1;
publicBarChart(){
CategoryDatasetdataset=getDataSet();
JFreeChartchart=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
CategoryPlotplot=chart.getCategoryPlot();//获取图表区域对象
CategoryAxisdomainAxis=plot.getDomainAxis();//水平底部列表
domainAxis.setLabelFont(newFont("黑体",Font.BOLD,14));//水平底部标题
domainAxis.setTickLabelFont(newFont("宋体",Font.BOLD,12));//垂直标题
ValueAxisrangeAxis=plot.getRangeAxis();//获取柱状
rangeAxis.setLabelFont(newFont("黑体",Font.BOLD,15));
chart.getLegend().setItemFont(newFont("黑体",Font.BOLD,15));
chart.getTitle().setFont(newFont("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=newChartPanel(chart,true);//这里也可以用chartFrame,可以直接生成一个独立的Frame
}
privatestaticCategoryDatasetgetDataSet(){
DefaultCategoryDatasetdataset=newDefaultCategoryDataset();
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");
returndataset;
}
publicChartPanelgetChartPanel(){
returnframe1;
}
}
效果图如下:
但我们把private static CategoryDatasetgetDataSet(){}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:
privatestaticCategoryDatasetgetDataSet(){
DefaultCategoryDatasetdataset=newDefaultCategoryDataset();
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");
returndataset;
}
效果图如下:
三, 实现饼状图的java代码:
packagecom.njue.testJFreeChart;
importjava.awt.Font;
importjava.text.DecimalFormat;
importjava.text.NumberFormat;
importjavax.swing.JPanel;
importorg.jfree.chart.ChartFactory;
importorg.jfree.chart.ChartPanel;
importorg.jfree.chart.JFreeChart;
importorg.jfree.chart.labels.StandardPieSectionLabelGenerator;
importorg.jfree.chart.plot.PiePlot;
importorg.jfree.data.general.DefaultPieDataset;
publicclassPieChart{
ChartPanelframe1;
publicPieChart(){
DefaultPieDatasetdata=getDataSet();
JFreeChartchart=ChartFactory.createPieChart3D("水果产量",data,true,false,false);
//设置百分比
PiePlotpieplot=(PiePlot)chart.getPlot();
DecimalFormatdf=newDecimalFormat("0.00%");//获得一个DecimalFormat对象,主要是设置小数问题
NumberFormatnf=NumberFormat.getNumberInstance();//获得一个NumberFormat对象
StandardPieSectionLabelGeneratorsp1=newStandardPieSectionLabelGenerator("{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=newChartPanel(chart,true);
chart.getTitle().setFont(newFont("宋体",Font.BOLD,20));//设置标题字体
PiePlotpiePlot=(PiePlot)chart.getPlot();//获取图表区域对象
piePlot.setLabelFont(newFont("宋体",Font.BOLD,10));//解决乱码
chart.getLegend().setItemFont(newFont("黑体",Font.BOLD,10));
}
privatestaticDefaultPieDatasetgetDataSet(){
DefaultPieDatasetdataset=newDefaultPieDataset();
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);
returndataset;
}
publicChartPanelgetChartPanel(){
returnframe1;
}
}
效果图如下:
四, 实现折线图的java代码:
packagecom.njue.testJFreeChart;
importjava.awt.Font;
importjava.text.SimpleDateFormat;
importorg.jfree.chart.ChartFactory;
importorg.jfree.chart.ChartPanel;
importorg.jfree.chart.JFreeChart;
importorg.jfree.chart.axis.DateAxis;
importorg.jfree.chart.axis.ValueAxis;
importorg.jfree.chart.plot.XYPlot;
importorg.jfree.data.time.Month;
importorg.jfree.data.time.TimeSeries;
importorg.jfree.data.time.TimeSeriesCollection;
importorg.jfree.data.xy.XYDataset;
publicclassTimeSeriesChart{
ChartPanelframe1;
publicTimeSeriesChart(){
XYDatasetxydataset=createDataset();
JFreeChartjfreechart=ChartFactory.createTimeSeriesChart("Legal&General单位信托基金价格","日期","价格",xydataset,true,true,true);
XYPlotxyplot=(XYPlot)jfreechart.getPlot();
DateAxisdateaxis=(DateAxis)xyplot.getDomainAxis();
dateaxis.setDateFormatOverride(newSimpleDateFormat("MMM-yyyy"));
frame1=newChartPanel(jfreechart,true);
dateaxis.setLabelFont(newFont("黑体",Font.BOLD,14));//水平底部标题
dateaxis.setTickLabelFont(newFont("宋体",Font.BOLD,12));//垂直标题
ValueAxisrangeAxis=xyplot.getRangeAxis();//获取柱状
rangeAxis.setLabelFont(newFont("黑体",Font.BOLD,15));
jfreechart.getLegend().setItemFont(newFont("黑体",Font.BOLD,15));
jfreechart.getTitle().setFont(newFont("宋体",Font.BOLD,20));//设置标题字体
}
privatestaticXYDatasetcreateDataset(){//这个数据集有点多,但都不难理解
TimeSeriestimeseries=newTimeSeries("legal&general欧洲指数信任",
org.jfree.data.time.Month.class);
timeseries.add(newMonth(2,2001),181.80000000000001D);
timeseries.add(newMonth(3,2001),167.30000000000001D);
timeseries.add(newMonth(4,2001),153.80000000000001D);
timeseries.add(newMonth(5,2001),167.59999999999999D);
timeseries.add(newMonth(6,2001),158.80000000000001D);
timeseries.add(newMonth(7,2001),148.30000000000001D);
timeseries.add(newMonth(8,2001),153.90000000000001D);
timeseries.add(newMonth(9,2001),142.69999999999999D);
timeseries.add(newMonth(10,2001),123.2D);
timeseries.add(newMonth(11,2001),131.80000000000001D);
timeseries.add(newMonth(12,2001),139.59999999999999D);
timeseries.add(newMonth(1,2002),142.90000000000001D);
timeseries.add(newMonth(2,2002),138.69999999999999D);
timeseries.add(newMonth(3,2002),137.30000000000001D);
timeseries.add(newMonth(4,2002),143.90000000000001D);
timeseries.add(newMonth(5,2002),139.80000000000001D);
timeseries.add(newMonth(6,2002),137D);
timeseries.add(newMonth(7,2002),132.80000000000001D);
TimeSeriestimeseries1=newTimeSeries("legal&general英国指数信任",
org.jfree.data.time.Month.class);
timeseries1.add(newMonth(2,2001),129.59999999999999D);
timeseries1.add(newMonth(3,2001),123.2D);
timeseries1.add(newMonth(4,2001),117.2D);
timeseries1.add(newMonth(5,2001),124.09999999999999D);
timeseries1.add(newMonth(6,2001),122.59999999999999D);
timeseries1.add(newMonth(7,2001),119.2D);
timeseries1.add(newMonth(8,2001),116.5D);
timeseries1.add(newMonth(9,2001),112.7D);
timeseries1.add(newMonth(10,2001),101.5D);
timeseries1.add(newMonth(11,2001),106.09999999999999D);
timeseries1.add(newMonth(12,2001),110.3D);
timeseries1.add(newMonth(1,2002),111.7D);
timeseries1.add(newMonth(2,2002),111D);
timeseries1.add(newMonth(3,2002),109.59999999999999D);
timeseries1.add(newMonth(4,2002),113.2D);
timeseries1.add(newMonth(5,2002),111.59999999999999D);
timeseries1.add(newMonth(6,2002),108.8D);
timeseries1.add(newMonth(7,2002),101.59999999999999D);
TimeSeriesCollectiontimeseriescollection=newTimeSeriesCollection();
timeseriescollection.addSeries(timeseries);
timeseriescollection.addSeries(timeseries1);
returntimeseriescollection;
}
publicChartPanelgetChartPanel(){
returnframe1;
}
}
效果图如下:
再来看一下主方法:
importjava.awt.GridLayout;
importjavax.swing.JFrame;
publicclassmainClass{
publicstaticvoidmain(Stringargs[]){
JFrameframe=newJFrame("Java数据统计图");
frame.setLayout(newGridLayout(2,2,10,10));
frame.add(newBarChart().getChartPanel());//添加柱形图
frame.add(newBarChart1().getChartPanel());//添加柱形图的另一种效果
frame.add(newPieChart().getChartPanel());//添加饼状图
frame.add(newTimeSeriesChart().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: