JFreeChart学习笔记

首先几个核心API要熟悉

JFreeChart     图表对象
XXXXDataset  数据集
XXXXPlot     图表区域对象,即具体的什么类型的图表,柱状,饼状等
XXXXAxis     X轴,Y轴对象
XXXXRenderer  负责如何显示图表对象
XXXXURLGenerator
XXXXToolTipGenerator

一般的实现步骤:

1.根据所要画的图,准备对应的数据集.

2.准备Plot,确定所要画的图的种类(如柱状,饼状等)

3.准备Axis,包括X,Y轴所表示的内容.

4.准备Renderer,确定如何显示图表对象

5.创建JFreeChart,把上面准备的相应参数传入.

6.保存图片到本地或传至WEB

java 代码

package test;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.TimeZone;

import org.jfree.data.KeyToGroupMap;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.time.Month;
import org.jfree.data.time.TimeTableXYDataset;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.TextAnchor;
import org.jfree.chart.*;
import org.jfree.chart.axis.CategoryAnchor;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.PeriodAxis;
import org.jfree.chart.axis.PeriodAxisLabelInfo;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.labels.StandardCategoryToolTipGenerator;
import org.jfree.chart.labels.StandardXYItemLabelGenerator;
import org.jfree.chart.labels.StandardXYToolTipGenerator;
import org.jfree.chart.plot.*;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.chart.renderer.category.GroupedStackedBarRenderer;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.renderer.xy.StackedXYBarRenderer;
import org.jfree.chart.renderer.xy.XYStepRenderer;

public class ChartDemo {

    public static void main(String[] args)
    {
        ChartDemo chartD = new ChartDemo();
        chartD.createBarDemo("bar.jpg");
        chartD.createPieDemo("pie.jpg");
        chartD.createXYBarDemo("xybar.jpg");

    }

    //创建柱状图
    public void createBarDemo(String jpgname)
    {

        CategoryDataset dataset = getBarDataset();
        JFreeChart chart = ChartFactory.createStackedBarChart("月统计报表", "统计月份", "数据", dataset, PlotOrientation.VERTICAL, true, true, false);

        //创建Renderer
        GroupedStackedBarRenderer groupedstackedbarrenderer = new GroupedStackedBarRenderer();

        //创建若干组,以便可分柱状,和叠方图
        KeyToGroupMap keytogroupmap = new KeyToGroupMap("G1");
        //目标为一组,实际,未完为另一组
        keytogroupmap.mapKeyToGroup("计划", "G1");
        keytogroupmap.mapKeyToGroup("实际", "G2");
        keytogroupmap.mapKeyToGroup("未完", "G2");
            //设置组
        groupedstackedbarrenderer.setSeriesToGroupMap(keytogroupmap);

        //显示数值
        groupedstackedbarrenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
            //可见?
        groupedstackedbarrenderer.setBaseItemLabelsVisible(true);
            //显示位置
        groupedstackedbarrenderer.setPositiveItemLabelPositionFallback(new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.BOTTOM_CENTER));
        groupedstackedbarrenderer.setItemMargin(0.05000000000000001D);

        //设置显示颜色
        groupedstackedbarrenderer.setSeriesPaint(0, new Color(255, 137, 255)); // 粉红
        groupedstackedbarrenderer.setSeriesPaint(1, new Color(0, 11, 220));// BLUE
        groupedstackedbarrenderer.setSeriesPaint(2, new Color(0, 148, 52));// 绿色


        CategoryPlot categoryplot = (CategoryPlot)chart.getPlot();
        categoryplot.setDomainGridlinePosition(CategoryAnchor.MIDDLE);

        //横网格线
        categoryplot.setRangeGridlinesVisible(true);
        //竖风格线
        categoryplot.setDomainGridlinesVisible(false);

        //横轴
        CategoryAxis domainAxis=categoryplot.getDomainAxis();
        //间隔
        domainAxis.setCategoryMargin(0.2);
        //竖轴
        //ValueAxis valueaxis = categoryplot.getRangeAxis();
        //设置数值显示范围
        //valueaxis.setRange(0.0D, 30000D);

        categoryplot.setRenderer(groupedstackedbarrenderer);
        categoryplot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);

        categoryplot.setDataset(1, dataset);
        categoryplot.mapDatasetToRangeAxis(1, 1);
        //categoryplot.mapDatasetToRangeAxis(1, 2);


        NumberAxis numberaxis = new NumberAxis("费用");
        //numberaxis.setRange(0,90000);
        //设置右边的Y轴
        categoryplot.setRangeAxis(1, numberaxis);

        LineAndShapeRenderer lineandshaperenderer = new LineAndShapeRenderer();
        lineandshaperenderer.setBaseToolTipGenerator(new StandardCategoryToolTipGenerator());
        lineandshaperenderer.setSeriesPaint(0, new Color(255, 137, 255)); // 粉红
        lineandshaperenderer.setSeriesPaint(1, new Color(0,11,220)); // 蓝色

        categoryplot.setRenderer(1, lineandshaperenderer);
        categoryplot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);


        this.savejpg(chart, jpgname);
    }

    //获取柱状图数据
    private CategoryDataset getBarDataset()
    {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        String plan="计划";
        String actual="实际";
        String leave = "未完";

        dataset.addValue(2000, plan, "一月");
        dataset.addValue(500, actual, "一月");
        dataset.addValue(1500, leave, "一月");

        dataset.addValue(2000, plan, "二月");
        dataset.addValue(500, actual, "二月");
        dataset.addValue(1500, leave, "二月");

        dataset.addValue(5000, plan, "三月");
        dataset.addValue(3200, actual, "三月");
        dataset.addValue(1800, leave, "三月");



        return dataset;

    }

    //创建XYBar
    public void createXYBarDemo(String jpgname)
    {
        TimeTableXYDataset dataset = this.getXYDataset();

        //设置X坐标轴
        PeriodAxis periodaxis = new PeriodAxis("时间");
        periodaxis.setTimeZone(TimeZone.getTimeZone("Pacific/Auckland"));
        periodaxis.setAutoRangeTimePeriodClass(org.jfree.data.time.Month.class);
        periodaxis.setMajorTickTimePeriodClass(org.jfree.data.time.Month.class);
        PeriodAxisLabelInfo aperiodaxislabelinfo[] = new PeriodAxisLabelInfo[2];
        aperiodaxislabelinfo[0] = new PeriodAxisLabelInfo(org.jfree.data.time.Month.class,
                new SimpleDateFormat("MMM"),
                new RectangleInsets(2D, 2D, 2D, 2D),
                new Font("SansSerif", 1, 10),
                Color.BLACK, false, new BasicStroke(0.0F), Color.lightGray);
        aperiodaxislabelinfo[1] = new PeriodAxisLabelInfo(org.jfree.data.time.Year.class, new SimpleDateFormat("yyyy"));
        periodaxis.setLabelInfo(aperiodaxislabelinfo);
        periodaxis.setLowerMargin(0.01D);
        periodaxis.setUpperMargin(0.01D);

        //设置Y坐标轴
        NumberAxis numberaxis = new NumberAxis("登入次数");
        numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        numberaxis.setUpperMargin(0.10000000000000001D);
        numberaxis.setRange(0,20000);

        //设置Renderer
        StackedXYBarRenderer stackedxybarrenderer = new StackedXYBarRenderer(0.14999999999999999D);
        stackedxybarrenderer.setDrawBarOutline(true);
        stackedxybarrenderer.setBaseItemLabelsVisible(false);
        stackedxybarrenderer.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator());
        stackedxybarrenderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER));
        stackedxybarrenderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator("{0} : {1} = {2}", new SimpleDateFormat("yyyy"), new DecimalFormat("0")));
        stackedxybarrenderer.setMargin(0.2);

        stackedxybarrenderer.setSeriesPaint(0, new Color(0,11,220));
        stackedxybarrenderer.setSeriesPaint(1, new Color(51,129,50));
        stackedxybarrenderer.setSeriesPaint(2, new Color(255,0,0));

        XYPlot plot = new XYPlot(dataset,periodaxis,numberaxis,stackedxybarrenderer);//数据集,X轴,Y轴,renderer
        plot.setRangeGridlinesVisible(true);
        plot.setDomainGridlinesVisible(false);
        JFreeChart chart = new JFreeChart("工作量统计",plot);


        XYPlot xyplot1=(XYPlot)chart.getPlot();

        XYStepRenderer xysteprenderer1 = new XYStepRenderer();
        xysteprenderer1.setBaseShapesVisible(true);
        xysteprenderer1.setSeriesStroke(0, new BasicStroke(1F));
        xysteprenderer1.setSeriesPaint(0, new Color(255,0,0));
        //xysteprenderer1.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
        //xysteprenderer1.setDefaultEntityRadius(6);
        xyplot1.setDataset(1, getXYDatasetLevel1());
        xyplot1.setRenderer(1,xysteprenderer1);

        XYStepRenderer xysteprenderer2 = new XYStepRenderer();
        xysteprenderer2.setBaseShapesVisible(true);
        xysteprenderer2.setSeriesStroke(0, new BasicStroke(2.0F));
        xysteprenderer2.setSeriesPaint(0, Color.yellow);
        xyplot1.setDataset(2, getXYDatasetLevel2());
        xyplot1.setRenderer(2,xysteprenderer2);


        this.savejpg(chart, jpgname);

    }

    private TimeTableXYDataset getXYDataset()
    {
        TimeTableXYDataset dataset = new TimeTableXYDataset();
        dataset.add(new Month(1,2005), 8000, "已完");
        dataset.add(new Month(1,2005), 2000, "未完");
        dataset.add(new Month(2,2005), 8000, "未完");


        return dataset;
    }

    private XYDataset getXYDatasetLevel1()
    {
        TimeTableXYDataset ttd1 = new TimeTableXYDataset();// 目标

        ttd1.add(new Month(1,2005), 8000, "目标");
        ttd1.add(new Month(2,2005), 9000, "目标");
        ttd1.add(new Month(3,2005), 10000, "目标");

        return ttd1;
    }

    private XYDataset getXYDatasetLevel2()
    {
        TimeTableXYDataset ttd2 = new TimeTableXYDataset();// 分布

        ttd2.add(new Month(1,2005), 2000, "分布");
        ttd2.add(new Month(2,2005), 2000, "分布");

        return ttd2;
    }


    //创建饼图
    public void createPieDemo(String jpgname)
    {
        DefaultPieDataset dataset = getPieDataset();
        JFreeChart chart = ChartFactory.createPieChart3D("水果产量", dataset, true, true, true);

        this.savejpg(chart, jpgname);
    }

    //获取饼图数据
    private DefaultPieDataset getPieDataset() {
        DefaultPieDataset dataset = new DefaultPieDataset();
        dataset.setValue("苹果", 100);
        dataset.setValue("梨子", 200);
        dataset.setValue("葡萄", 300);
        dataset.setValue("荔枝", 400);
        dataset.setValue("香蕉", 500);
        dataset.setValue("枣子", 600);
        return dataset;
    }


    //保存为本地图片
    private void savejpg(JFreeChart chart,String jpgname)
    {
        FileOutputStream jpg = null;
        try {
            jpg = new FileOutputStream(jpgname);
            ChartUtilities.writeChartAsJPEG(jpg,0.5f,chart,800,500,null);


        } catch (Exception e) {
            // TODO 自动生成 catch 块
            e.printStackTrace();
        }
        finally
        {
            try {
                jpg.close();
            } catch (IOException e) {
                // TODO 自动生成 catch 块
                e.printStackTrace();
            }
        }

    }

}

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