標籤:
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)