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怎麼用java做柱形圖？

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  • 1 # 列克美食

    實現柱形圖的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;

    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", // 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(對於簡單的柱狀圖必須是false)

    false, // 是否生成工具

    false // 是否生成URL連結

    );

    //從這裡開始

    CategoryPlot plot=chart.getCategoryPlot();//獲取圖表區域物件

    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();//獲取柱狀

    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，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,可以直接生成一個獨立的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;

    }

    }

    效果圖如下：

    但我們把private static CategoryDataset getDataSet(){}方法中的資料變化一下後，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");

    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.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物件，主要是設定小數問題

    NumberFormat nf = NumberFormat.getNumberInstance();//獲得一個NumberFormat物件

    StandardPieSectionLabelGenerator sp1 = new StandardPieSectionLabelGenerator("{0} {2}", nf, df);//獲得StandardPieSectionLabelGenerator物件

    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();//獲取圖表區域物件

    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.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單位信托基金價格", "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();//獲取柱狀

    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;

    }

    }

    效果圖如下：

    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()); //新增柱形圖

    frame.add(new BarChart1().getChartPanel()); //新增柱形圖的另一種效果

    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);

    }

    }

  • 2 # 程式設計頌

    用jfreechart

    jfreechart繪製柱狀圖

    import java.io.File;

    import java.io.IOException;

    import org.jfree.chart.ChartFactory;

    import org.jfree.chart.ChartUtilities;

    import org.jfree.chart.JFreeChart;

    import org.jfree.chart.plot.PlotOrientation;

    import org.jfree.data.category.DefaultCategoryDataset;

    /*

    * 繪製柱狀圖

    *你亮哥

    * */

    public class BarChart3DDemo

    {

    public static void main(String[] args)

    {

    try

    {

    //設定主題

    ChartFactory.setChartTheme(Theme.getTheme());

    //構造資料

    DefaultCategoryDataset dataset = new DefaultCategoryDataset();

    dataset.addValue(100, "JAVA","1");

    dataset.addValue(200, "js","1");

    dataset.addValue(200, "C++", "2");

    dataset.addValue(300, "C", "3");

    dataset.addValue(400, "HTML", "4");

    dataset.addValue(400, "CSS", "5");

    /*

    * public static JFreeChart createBarChart3D(

    * java.lang.String title, 設定圖表的標題

    * java.lang.String categoryAxisLabel, 設定分類軸的標示

    * java.lang.String valueAxisLabel, 設定值軸的標示

    * CategoryDataset dataset, 設定資料

    * PlotOrientation orientation, 設定圖表的方向

    * boolean legend, 設定是否顯示圖例

    * boolean tooltips,設定是否生成熱點工具

    * boolean urls) 設定是否顯示url

    */

    JFreeChart chart = ChartFactory.createBarChart3D("程式語言統計", "語言",

    "學習人數", dataset, PlotOrientation.VERTICAL, true, false,

    false);

    //儲存圖表

    ChartUtilities.saveChartAsPNG(new File("E:/chart/BarChart3D.png"), chart, 800, 500);

    System.out.println("繪圖完成");

    }

    catch (IOException e)

    {

    e.printStackTrace();

    }

    }

    }

    ===================================================================================

    //一條線 有點 有數

    package Test;

    import java.awt.Color;

    import java.awt.Font;

    import org.jfree.chart.ChartFactory;

    import org.jfree.chart.ChartFrame;

    import org.jfree.chart.JFreeChart;

    import org.jfree.chart.axis.AxisSpace;

    import org.jfree.chart.labels.ItemLabelAnchor;

    import org.jfree.chart.labels.ItemLabelPosition;

    import org.jfree.chart.labels.StandardXYItemLabelGenerator;

    import org.jfree.chart.plot.XYPlot;

    import org.jfree.chart.renderer.xy.XYItemRenderer;

    import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;

    import org.jfree.chart.title.TextTitle;

    import org.jfree.data.time.Month;

    import org.jfree.data.time.TimeSeries;

    import org.jfree.data.time.TimeSeriesCollection;

    import org.jfree.ui.RectangleInsets;

    import org.jfree.ui.TextAnchor;

    public class try123 {

    public static void main(String[] args){

    //首先構造資料

    TimeSeries timeSeries = new TimeSeries("BMI", Month.class);

    // 時間曲線資料集合

    TimeSeriesCollection lineDataset = new TimeSeriesCollection();

    // 構造資料集合

    timeSeries.add(new Month(1, 2009), 45);

    timeSeries.add(new Month(2, 2009), 46);

    timeSeries.add(new Month(3, 2009), 1);

    timeSeries.add(new Month(4, 2009), 500);

    timeSeries.add(new Month(5, 2009), 43);

    timeSeries.add(new Month(6, 2009), 324);

    timeSeries.add(new Month(7, 2009), 632);

    timeSeries.add(new Month(8, 2009), 34);

    timeSeries.add(new Month(9, 2009), 12);

    timeSeries.add(new Month(10, 2009), 543);

    timeSeries.add(new Month(11, 2009), 32);

    timeSeries.add(new Month(12, 2009), 225);

    lineDataset.addSeries(timeSeries);

    JFreeChart chart = ChartFactory.createTimeSeriesChart("", "date", "bmi", lineDataset, true, true, true);

    //增加標題

    chart.setTitle(new TextTitle("XXXBMI指數", new Font("隸書", Font.ITALIC, 15)));

    chart.setAntiAlias(true);

    XYPlot plot = (XYPlot) chart.getPlot();

    plot.setAxisOffset(new RectangleInsets(10,10,10,10));//圖片區與座標軸的距離

    plot.setOutlinePaint(Color.PINK);

    plot.setInsets(new RectangleInsets(15,15,15,15));//座標軸與最外延的距離

    // plot.setOrientation(PlotOrientation.HORIZONTAL);//圖形的方向，包括座標軸。

    AxisSpace as = new AxisSpace();

    as.setLeft(25);

    as.setRight(25);

    plot.setFixedRangeAxisSpace(as);

    chart.setPadding(new RectangleInsets(5,5,5,5));

    chart.setNotify(true);

    // 設定曲線是否顯示資料點

    XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)plot.getRenderer();

    xylineandshaperenderer.setBaseShapesVisible(true);

    // 設定曲線顯示各資料點的值

    XYItemRenderer xyitem = plot.getRenderer();

    xyitem.setBaseItemLabelsVisible(true);

    xyitem.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.INSIDE10, TextAnchor.BASELINE_LEFT));

    xyitem.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator());

    xyitem.setBaseItemLabelFont(new Font("Dialog", 1, 14));

    plot.setRenderer(xyitem);

    //顯示

    ChartFrame frame = new ChartFrame("try1", chart);

    frame.pack();

    frame.setVisible(true);

    }

    }

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