JFreeChart目前是最好的java图形解决方案,基本能够解决目前的图形方面的需求,主要包括如下几个方面:pie charts (2D and 3D):饼图(平面和立体)bar charts (regular and stacked, with an optional 3D effect):柱状图line and area charts:曲线图scatter plots and bubble chartstime series, high/low/open/close charts and candle stick charts:时序图combination charts:复合图Pareto chartsGantt charts:甘特图wind plots, meter charts and symbol chartswafer map charts(态图表,饼图(二维和三维) , 柱状图 (水平,垂直),线图,点图,时间变化图,甘特图, 股票行情图,混和图, 温度计图, 刻度图等常用商用图表)图形可以导出成PNG和JPEG格式,同时还可以与PDF和EXCEL关联
JFreeChart核心类库介绍:发现源码的主要由两个大的包组成:org.jfree.chart,org.jfree.data。其中前者主要与图形本身有关,后者与图形显示的数据有关。具体研究如果大家有兴趣的话可以自己研究,以后有时间我会告诉大家怎么去研究源码。核心类主要有:org.jfree.chart.JFreeChart:图表对象,任何类型的图表的最终表现形式都是在该对象进行一些属性的定制。JFreeChart引擎本身提供了一个工厂类用于创建不同类型的图表对象org.jfree.data.category.XXXDataSet:数据集对象,用于提供显示图表所用的数据。根据不同类型的图表对应着很多类型的数据集对象类org.jfree.chart.plot.XXXPlot:图表区域对象,基本上这个对象决定着什么样式的图表,创建该对象的时候需要Axis、Renderer以及数据集对象的支持org.jfree.chart.axis.XXXAxis:用于处理图表的两个轴:纵轴和横轴org.jfree.chart.render.XXXRender:负责如何显示一个图表对象org.jfree.chart.urls.XXXURLGenerator:用于生成Web图表中每个项目的鼠标点击链接XXXXXToolTipGenerator:用于生成图象的帮助提示,不同类型图表对应不同类型的工具提示类
1:饼图:
package test;
import java.awt.Font;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.plot.PiePlot;import org.jfree.data.general.DefaultPieDataset;import org.jfree.data.general.PieDataset;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities;
public class PieCharts extends ApplicationFrame{public PieCharts(String s){super(s);setContentPane(createDemoPanel());}// 生成显示图表的面板public static JPanel createDemoPanel(){JFreeChart jfreechart = createChart(createDataset());return new ChartPanel(jfreechart);}// 生成饼图数据集对象public static PieDataset createDataset(){DefaultPieDataset defaultpiedataset = new DefaultPieDataset();defaultpiedataset.setValue("管理人员",10.02D);defaultpiedataset.setValue("市场人员",20.23D);defaultpiedataset.setValue("开发人员",60.02D);defaultpiedataset.setValue("OEM人员",10.02D);defaultpiedataset.setValue("其他人员",5.11D);return defaultpiedataset;}//生成图表主对象JFreeChartpublic static JFreeChart createChart(PieDataset piedataset){//定义图表对象JFreeChart jfreechart = ChartFactory.createPieChart("CityInfoPort公司组织架构图",piedataset,true,true,false);//获得图表显示对象PiePlot pieplot = (PiePlot)jfreechart.getPlot();//设置图表标签字体pieplot.setLabelFont(new Font("SansSerif",Font.BOLD,12));pieplot.setNoDataMessage("No data available");pieplot.setCircular(true);pieplot.setLabelGap(0.01D);//间距return jfreechart;}public static void main(String[] args){PieCharts fjc = new PieCharts("CityInfoPort公司组织架构图");fjc.pack();RefineryUtilities.centerFrameOnScreen(fjc);fjc.setVisible(true);}
}
2:折线图
package test;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.axis.NumberAxis;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.plot.PlotOrientation;import org.jfree.data.category.DefaultCategoryDataset;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities;
public class LineCharts extends ApplicationFrame {
public LineCharts(String s) {super(s);setContentPane(createDemoLine());}
public static void main(String[] args) {LineCharts fjc = new LineCharts("折线图");fjc.pack();RefineryUtilities.centerFrameOnScreen(fjc);fjc.setVisible(true);
}
// 生成显示图表的面板public static JPanel createDemoLine() {JFreeChart jfreechart = createChart(createDataset());return new ChartPanel(jfreechart);}
// 生成图表主对象JFreeChartpublic static JFreeChart createChart(DefaultCategoryDataset linedataset) {//定义图表对象JFreeChart chart = ChartFactory.createLineChart("折线图", // chart title"时间", // domain axis label"销售额(百万)", // range axis labellinedataset, // dataPlotOrientation.VERTICAL, // orientationtrue, // include legendtrue, // tooltipsfalse // urls);CategoryPlot plot = chart.getCategoryPlot();// customise the range axis...NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());rangeAxis.setAutoRangeIncludesZero(true);rangeAxis.setUpperMargin(0.20);rangeAxis.setLabelAngle(Math.PI / 2.0);
return chart;}
//生成数据public static DefaultCategoryDataset createDataset() {DefaultCategoryDataset linedataset = new DefaultCategoryDataset();// 各曲线名称String series1 = "冰箱";String series2 = "彩电";String series3 = "洗衣机";
// 横轴名称(列名称)String type1 = "1月";String type2 = "2月";String type3 = "3月";
linedataset.addValue(0.0, series1, type1);linedataset.addValue(4.2, series1, type2);linedataset.addValue(3.9, series1, type3);
linedataset.addValue(1.0, series2, type1);linedataset.addValue(5.2, series2, type2);linedataset.addValue(7.9, series2, type3);
linedataset.addValue(2.0, series3, type1);linedataset.addValue(9.2, series3, type2);linedataset.addValue(8.9, series3, type3);
return linedataset;}
}
3:柱状图:
package test;
import java.awt.Color;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.plot.PlotOrientation;import org.jfree.chart.renderer.category.BarRenderer3D;import org.jfree.data.category.CategoryDataset;import org.jfree.data.general.DatasetUtilities;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities;
public class BarCharts extends ApplicationFrame {
public BarCharts(String s) {super(s);setContentPane(createDemoBar());}
// 生成显示图表的面板public static JPanel createDemoBar() {JFreeChart jfreechart = createChart(createDataset());return new ChartPanel(jfreechart);}
// 生成图表主对象JFreeChartpublic static JFreeChart createChart(CategoryDataset dataset) {JFreeChart chart = ChartFactory.createBarChart3D("水果销量统计图", //建立3D柱状图"水果",//横轴名称"销量",//纵轴名称dataset,//数据集PlotOrientation.VERTICAL,//纵向显示true,//显示每个颜色柱子的柱名false, false);CategoryPlot plot = chart.getCategoryPlot();//设置图的高级属性BarRenderer3D renderer = new BarRenderer3D();//3D属性修改renderer.setBaseOutlinePaint(Color.BLACK);//设置边框颜色为blackrenderer.setWallPaint(Color.gray); //设置wall的颜色为grayrenderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());//设置柱顶数据,API中居然没有StandardCategoryItemLabelGenerator这个类//renderer.setItemLabelFont(new Font("黑体",Font.PLAIN,12));//设置柱顶数据字体renderer.setItemLabelsVisible(true);//打开ItemLabel开关plot.setRenderer(renderer);//将修改后的属性值保存到图中plot.setForegroundAlpha(0.6f);//柱的透明度
return chart;}
// 生成数据public static CategoryDataset createDataset() {
double[][] data = new double[][] { { 672, 766, 223, 540, 126 },{ 325, 521, 210, 340, 106 }, { 332, 256, 523, 240, 526 } };// 设置数据String[] rowKeys = { "苹果", "梨子", "葡萄" };// 行标志String[] columnKeys = { "北京", "上海", "广州", "成都", "深圳" };// 列标志CategoryDataset linedataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data); // 建立数据集
return linedataset;}
public static void main(String[] args) {BarCharts fjc = new BarCharts("柱状图");fjc.pack();RefineryUtilities.centerFrameOnScreen(fjc);fjc.setVisible(true);
}
}
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