最近在做資料探勘的課程設計,需要將資料分析的結果很直覺的展現給用戶,這就要用到資料統計圖,要實現這個功能就需要幾個第三方套件了:
1. jfreechart-1.0.13.jar
2. jcommon-1.0.16.jar
3. gnujaxp.jar
先來看一下,最終效果圖:
主要是jfreechart-1.0.13.jar,但這三個包要齊全,我已經將所有與jfreechart有關的jar包與本文實例的工程(代碼)一同壓縮上傳了,有興趣的同學可以下載,
下載網址:http://download.csdn.net/detail/pzhtpf/4327700
接下來,我們一步一步來實作本程式。
一,前期準備工作,也就把這三個第三方包添加進本文工程,添加過程特別簡單,前面寫過一篇博客,講的是java如何讀取Excel表格中的數據(有興趣的同學可以看一看: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資料夾lib;
2, 將上述三個jar包,複製到lib
3,然後右鍵點選這個java項目,選擇Properties
4,在左側清單裡選取Java Build Path,右側選取Libraries
5,點選Add JARs
6, 然後去選擇這個專案中lib資料夾中的三個jar,點選確定
成功後,專案中會多一個資料夾為:Referenced Libraries
二, 實作長條圖的java程式碼:
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; 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; import org.jfree.data.category.DefaultCategoryDataset;import org.jfree.data.category.DefaultCategoryData? public BarChart(){ CategoryDataset dataset = getDataSet(); JFreeChart chart = ChartFactory.createBarChart3D( "水果", // 圖表標題"水果種類", // 目錄軸的顯示標籤"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(對於簡單的長條圖必須是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();//取得圖表區域物件CategoryAxis domainAxis=plot.getDomainAxis(); //水平底部清單domainAxis.setLabel( new Font("黑色本體",Font.BOLD,14)); //水平底標題domainAxis.setTickLabelFont(new Font("宋體",Font.BOLD,12)); //垂直標題ValueAxis rangeAxis=plot.getRangeAxis();//取得柱狀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));//設定標題字體//到這裡結束,雖然程式碼有點多,但只為一個目的,解決漢字亂碼問題frame1=new ChartPanel(chart,true); //這裡也可以用chartFrame,可以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," " ", "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; } }效果圖如下:
但我們把private static CategoryDataset getDataSet(){}方法中的資料改變一下後,又會形成另一種效果,比如說我們改成:
private static CategoryDataset getDataSet() { DefaultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(100, "蘋果", "蘋果"); dataset.addValue(200, "梨子", "梨子"); , "葡萄", "葡萄"); dataset.addValue(400, "香蕉", "香蕉"); dataset.addValue(500, "荔枝", "荔枝"); return dataset; }效果圖如下:
三實現餅狀圖的java程式碼:
package com.njue.testJFreeChart; import java.awt.Font; import java.text.DecimalFormat; import java.text.NumberFormat; import javax.swing.JPanel; import org.jfree.chart.Charty; .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 Piehartd public class 13; (){ 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%");//取得一個DecimalFormat對象,主要是設定小數問題NumberFormat nf = NumberFormat.getNumberInstance();//取得一個NumberFormat物件StandardPieSectionLabelGenerator sp1 = new StandardPieSectionLabelGenerator" nf, df);//取得StandardPieSectionLabelGenerator物件pieplot.setLabelGenerator(sp1);//設定圓餅圖顯示百分比//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));//設定標題字體PiePlot piePlot= (PiePlot) chart.getPlot();//取得圖表區域物件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; } }效果圖如下:
四實現折線圖的java程式碼:
package com.njue.testJFreeChart; import java.awt.Font; import java.text.SimpleDateFormat; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfreeFactory; import org.jfree.chart.ChartPanel; import org.jfree。 .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, truePlottrue); xyplot = (XYPlot) jfreechart.getPlot(); DateAxis dateaxis = (DateAxis) xyplot.getDomainAxis(); dateaxis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy")); frame1=new ChartPanel(jfreechart,true); dateer BOLD,14)); //水平底標題dateaxis.setTickLabelFont(new Font("宋體",Font.BOLD,12)); //垂直標題ValueAxis rangeAxis=xyplot.getRangeAxis();//取得柱狀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));//設定標題字體} 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), 167.3000000000D. Month(4, 2001), 153.80000000000001D); timeseries.add(new Month(5, 2001), 167.59999999999999D); timeseries.add(new Month(6, 2001); timeseries.add(new Month(7, 2001), 148.30000000000001D); timeseries.add(new Month(8, 2001), 153.90000000000001D); timeseries. 142.69999999999999D); timeseries.add(new Month(10, 2001), 123.2D); timeseries.add(new Month(11, 2001), 131.80000000000001, 2001000, 139.59999999999999D); timeseries.add(new Month(1, 2002), 142.90000000000001D); timeseries.add(new Month(2, 2000000001D); timeseries.add(new Month(2, 2002), 138.699959 Month(3, 2002), 137.30000000000001D); timeseries.add(new Month(4, 2002), 143.90000000000001D); timeseries.add(new Month(0000000, 2009. timeseries.add(new Month(6, 2002), 137D); timeseries.add(new Month(7, 2002), 132.80000000000001D); TimeSeries timeseries1 = new TimeSeries("legalfree 是英國信任指數. 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, 20012); add(new Month(5, 2001), 124.09999999999999D); timeseries1.add(new Month(6, 2001), 122.5999999999999D); timeseries1.addser(new Month(7, 20011); 2001), 116.5D); timeseries1.add(new Month(9, 2001), 112.7D); timeseries1.add(new Month(10, 2001), 101.5D); timeseries1.add(new2011,5D); , 106.09999999999999D); timeseries1.add(new Month(12, 2001), 110.3D); timeseries1.add(new Month(1, 2002), 111.7D); ; timeseries1.add(new Month(3, 2002), 109.59999999999999D); timeseries1.add(new Month(4, 2002), 113.2D); timeseries1.add(new Month(591005991.59991.59991.時間。 timeseriescollection.addSeries(timeseries1); return timeseriescollection; } public ChartPanel getChartPanel(){ return frame1; } }效果圖如下:
再來看主方法:
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(new GridLayout( 2,2,10,10)); frame.add(new BarChart().getChartPanel()); //加上長條圖frame.add(new BarChart1().getChartPanel()); //加入長條圖的另一種效果frame.add(new PieChart().getChartPanel ()); //新增餅狀圖frame.add(new TimeSeriesChart().getChartPanel()); //新增折線圖frame.setBounds(50, 50, 800, 600); frame.setVisible(true); } }五總結
以上都是一個簡單的例子去實現了,想了解更深的同學可自行查詢資料,其實以上程式碼都通俗易懂,只要結合自己的實際情況,便可開發出屬於自己的Application,大家可以看出我這裡是在Application上實現的,其實更多狀況資料統計圖在javaweb上應用更多,大家也可自行了解。