java實現各種資料統計圖(直條圖,餅圖,折線圖)

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近期在做資料採礦的課程設計,須要將資料分析的結果非常直觀的展現給使用者,這就要用到資料統計圖,要實現這個功能就須要幾個第三方包了:

1.       jfreechart-1.0.13.jar

2.       jcommon-1.0.16.jar

3.       gnujaxp.jar

 

先來看一下,終於:

 

主要是jfreechart-1.0.13.jar,但這三個包要齊全,我已經將全部與jfreechart有關的jar包與本文執行個體的project(代碼)一同壓縮上傳了,有興趣的同學能夠下載,

:http://download.csdn.net/detail/pzhtpf/4327700

 

接下來,我們一步步來實現本程式。

 

一,前期準備工作,也就把這三個第三方包加入進本文project,加入過程特別簡單,前面寫過一篇部落格,講的是java怎樣讀取Excel表格中的資料(有興趣的同學能夠看一看:http://blog.csdn.net/pzhtpf/article/details/7506135),也要加入第三方包,加入過程一模一樣,這裡我們在複習一遍:

1, 建,立java項目,在這個項目在建立一個新的目錄lib;

2, 將上述三個jar包,拷貝到lib

3,然後右鍵點擊這個java項目,選擇Properties

4,在左側列表裡選中Java Build Path,右側選中Libraries

5,點擊Add JARs

6, 然後去選擇這個項目中lib目錄中的三個jar,點擊確定

成功後,項目中會多一個目錄為:Referenced Libraries

 

二, 實現直條圖的java代碼:

  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", // 圖表標題                            "水果種類", // 檔案夾軸的顯示標籤                            "數量", // 數值軸的顯示標籤                            dataset, // 資料集                            PlotOrientation.VERTICAL, // 圖表方向:水平、垂直                            true,           // 是否顯示圖例(對於簡單的柱狀圖必須是false)                            false,          // 是否產生工具                            false           // 是否產生URL連結                            );                //從這裡開始        CategoryPlot plot=chart.getCategoryPlot();//擷取圖表區域對象        CategoryAxis domainAxis=plot.getDomainAxis();         //水平底部列表         domainAxis.setLabelFont(new Font("黑體",Font.BOLD,14));         //水平底部標題         domainAxis.setTickLabelFont(new Font("宋體",Font.BOLD,12));  //垂直標題         ValueAxis rangeAxis=plot.getRangeAxis();//擷取柱狀         rangeAxis.setLabelFont(new Font("黑體",Font.BOLD,15));          chart.getLegend().setItemFont(new Font("黑體", Font.BOLD, 15));          chart.getTitle().setFont(new Font("宋體",Font.BOLD,20));//設定標題字型                    //到這裡結束,儘管代碼有點多,但僅僅為一個目的,解決漢字亂碼問題                   frame1=new ChartPanel(chart,true);        //這裡也能夠用chartFrame,能夠直接產生一個獨立的Frame         }   private static CategoryDataset getDataSet() {           DefaultCategoryDataset dataset = new DefaultCategoryDataset();           dataset.addValue(100, "北京", "蘋果");           dataset.addValue(100, "上海", "蘋果");           dataset.addValue(100, "廣州", "蘋果");           dataset.addValue(200, "北京", "梨子");           dataset.addValue(200, "上海", "梨子");           dataset.addValue(200, "廣州", "梨子");           dataset.addValue(300, "北京", "葡萄");           dataset.addValue(300, "上海", "葡萄");           dataset.addValue(300, "廣州", "葡萄");           dataset.addValue(400, "北京", "香蕉");           dataset.addValue(400, "上海", "香蕉");           dataset.addValue(400, "廣州", "香蕉");           dataset.addValue(500, "北京", "荔枝");           dataset.addValue(500, "上海", "荔枝");           dataset.addValue(500, "廣州", "荔枝");           return dataset;}public ChartPanel getChartPanel(){return frame1;}}


 

例如以下:

 

但我們把private static CategoryDataset getDataSet(){}方法中的資料變化一下後,又會形成還有一種效果,比方說我們改成:

private static CategoryDataset getDataSet() {           DefaultCategoryDataset dataset = new DefaultCategoryDataset();           dataset.addValue(100, "蘋果", "蘋果");           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;}


 

例如以下:

 

三,    實現餅狀圖的java代碼:

 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("水果產量",data,true,false,false);    //設定百分比      PiePlot pieplot = (PiePlot) chart.getPlot();      DecimalFormat df = new DecimalFormat("0.00%");//獲得一個DecimalFormat對象,主要是設定小數問題      NumberFormat nf = NumberFormat.getNumberInstance();//獲得一個NumberFormat對象      StandardPieSectionLabelGenerator sp1 = new StandardPieSectionLabelGenerator("{0}  {2}", nf, df);//獲得StandardPieSectionLabelGenerator對象      pieplot.setLabelGenerator(sp1);//設定餅圖顯示百分比    //沒有資料的時候顯示的內容      pieplot.setNoDataMessage("無資料顯示");      pieplot.setCircular(false);      pieplot.setLabelGap(0.02D);        pieplot.setIgnoreNullValues(true);//設定不顯示空值      pieplot.setIgnoreZeroValues(true);//設定不顯示負值     frame1=new ChartPanel (chart,true);      chart.getTitle().setFont(new Font("宋體",Font.BOLD,20));//設定標題字型      PiePlot piePlot= (PiePlot) chart.getPlot();//擷取圖表區域對象      piePlot.setLabelFont(new Font("宋體",Font.BOLD,10));//解決亂碼      chart.getLegend().setItemFont(new Font("黑體",Font.BOLD,10));}    private static DefaultPieDataset getDataSet() {        DefaultPieDataset dataset = new DefaultPieDataset();        dataset.setValue("蘋果",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;        }}


 

例如以下:

 

四,      實現折線圖的java代碼:

 

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單位信託基金價格", "日期", "價格",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("黑體",Font.BOLD,14));         //水平底部標題        dateaxis.setTickLabelFont(new Font("宋體",Font.BOLD,12));  //垂直標題        ValueAxis rangeAxis=xyplot.getRangeAxis();//擷取柱狀        rangeAxis.setLabelFont(new Font("黑體",Font.BOLD,15));        jfreechart.getLegend().setItemFont(new Font("黑體", Font.BOLD, 15));        jfreechart.getTitle().setFont(new Font("宋體",Font.BOLD,20));//設定標題字型}  private static XYDataset createDataset() {  //這個資料集有點多,但都不難理解        TimeSeries timeseries = new TimeSeries("legal & general歐洲指數信任",                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英國指數信任",                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;        }}


 

例如以下:

 

再來看一下主方法

import java.awt.GridLayout;import javax.swing.JFrame;public class mainClass {public static void main(String args[]){JFrame frame=new JFrame("Java資料統計圖");frame.setLayout(new GridLayout(2,2,10,10));frame.add(new BarChart().getChartPanel());           //加入直條圖frame.add(new BarChart1().getChartPanel());          //加入直條圖的還有一種效果frame.add(new PieChart().getChartPanel());           //加入餅狀圖frame.add(new TimeSeriesChart().getChartPanel());    //加入折線圖frame.setBounds(50, 50, 800, 600);frame.setVisible(true);}}


 

五,             總結

 

以上都是一個簡單的範例去實現了,想瞭解更深的同學可自行查詢資料,事實上以上代碼都通俗易懂,僅僅要結合自己的實際情況,便可開發出屬於自己的Application,大家能夠看出我這裡是在Application上實現的,事實上很多其它情況資料統計圖在javaweb上應用很多其它,大家也可自行瞭解。

ps:如執行本文project項目是出現錯誤,請參考博文:http://blog.csdn.net/pzhtpf/article/details/7506135

 

 

 

 

 

 

 

 

java實現各種資料統計圖(直條圖,餅圖,折線圖)

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