JfreeChart的使用
Jfreechart可以用来制作各种类型的图表，这些图标包括饼图，柱状图，线图，区域图，分布图，混合图，甘特图及一些仪表盘。
jfreechart的maven引用如下：
<dependency>
<groupId>org.jfree</groupId>
<artifactId>jfreechart</artifactId>
<version>1.0.15</version>
</dependency>
<dependency>
<groupId>org.jfree</groupId>
<artifactId>jfreechart</artifactId>
<version>1.0.15</version>
<classifier>sources</classifier>
</dependency>
<dependency>
<groupId>org.jfree</groupId>
<artifactId>jfreechart</artifactId>
<version>1.0.15</version>
<classifier>javadoc</classifier>
</dependency>
官方地址为http://www.jfree.org/jfreechart/index.html
jfreechart的图形可以导出为jpg和png格式，也可以和pdf和excel关联。
jfreechart主要两个大的包组成：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。
核心的类有
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
这里有一个完整的jfreechart的代码
public class JfreeChartTest {
public static void main(String [] args){
test();
test2();
test3();
test4();
test5();
test6();
test7();
}
public static void test() {
//创建饼图数据对象
DefaultPieDataset dfp=new DefaultPieDataset();
dfp.setValue("管理人员", 25);
dfp.setValue("市场人员", 35);
dfp.setValue("开发人员", 20);
dfp.setValue("后勤人员", 5);
dfp.setValue("财务人员", 15);
//Create JFreeChart object
JFreeChart a =ChartFactory.createPieChart("CityInfoPort公司组织架构图",dfp, true, true, true);
ChartFrame frame=new ChartFrame ("CityInfoPort公司组织架构图 ",a,true);
frame.pack();
frame.setVisible(true);
}
public static void test2() {
//创建类别图（Category）数据对象
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(100, "北京", "苹果");
dataset.addValue(100, "上海", "苹果");
dataset.addValue(100, "广州", "苹果");
dataset.addValue(200, "北京", "梨子");
dataset.addValue(200, "上海", "梨子");
dataset.addValue(200, "广州", "梨子");
dataset.addValue(300, "北京", "葡萄");
dataset.addValue(300, "上海", "葡萄");
dataset.addValue(300, "广州", "葡萄");
dataset.addValue(400, "北京", "香蕉");
dataset.addValue(400, "上海", "香蕉");
dataset.addValue(400, "广州", "香蕉");
dataset.addValue(500, "北京", "荔枝");
dataset.addValue(500, "上海", "荔枝");
dataset.addValue(500, "广州", "荔枝");
JFreeChart chart=ChartFactory.createBarChart3D("水果产量图", "水果", "水果", dataset, PlotOrientation.VERTICAL, true, true, true);
ChartFrame frame=new ChartFrame ("水果产量图 ",chart,true);
frame.pack();
frame.setVisible(true);
}
private static void test3() {
String series1 = "First";
String series2 = "Second";
String series3 = "Third";
String type1 = "2001";
String type2 = "2002";
String type3 = "2003";
String type4 = "2004";
String type5 = "2005";
String type6 = "2006";
String type7 = "2007";
String type8 = "2008";
DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
defaultcategorydataset.addValue(1.0D, series1, type1);
defaultcategorydataset.addValue(4D, series1, type2);
defaultcategorydataset.addValue(3D, series1, type3);
defaultcategorydataset.addValue(5D, series1, type4);
defaultcategorydataset.addValue(5D, series1, type5);
defaultcategorydataset.addValue(7D, series1, type6);
defaultcategorydataset.addValue(7D, series1, type7);
defaultcategorydataset.addValue(8D, series1, type8);
defaultcategorydataset.addValue(5D, series2, type1);
defaultcategorydataset.addValue(7D, series2, type2);
defaultcategorydataset.addValue(6D, series2, type3);
defaultcategorydataset.addValue(8D, series2, type4);
defaultcategorydataset.addValue(4D, series2, type5);
defaultcategorydataset.addValue(4D, series2, type6);
defaultcategorydataset.addValue(2D, series2, type7);
defaultcategorydataset.addValue(1.0D, series2, type8);
defaultcategorydataset.addValue(4D, series3, type1);
defaultcategorydataset.addValue(3D, series3, type2);
defaultcategorydataset.addValue(2D, series3, type3);
defaultcategorydataset.addValue(3D, series3, type4);
defaultcategorydataset.addValue(6D, series3, type5);
defaultcategorydataset.addValue(3D, series3, type6);
defaultcategorydataset.addValue(4D, series3, type7);
defaultcategorydataset.addValue(3D, series3, type8);
JFreeChart jfreechart = ChartFactory.createLineChart("折线图 Demo 1",
"Type","Value",
defaultcategorydataset,PlotOrientation.VERTICAL,
true,true,false);
CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();
categoryplot.setBackgroundPaint(Color.lightGray);
categoryplot.setRangeGridlinePaint(Color.white);
ChartFrame frame=new ChartFrame ("折线图 ",jfreechart,true);
frame.pack();
frame.setVisible(true);
}
private static void test4() {
XYSeries xyseries = new XYSeries("First"); //先产生XYSeries 对象
xyseries.add(1.0D, 1.0D);
xyseries.add(2D, 4D);
xyseries.add(3D, 3D);
xyseries.add(4D, 5D);
xyseries.add(5D, 5D);
xyseries.add(6D, 7D);
xyseries.add(7D, 7D);
xyseries.add(8D, 8D);
XYSeries xyseries1 = new XYSeries("Second");
xyseries1.add(1.0D, 5D);
xyseries1.add(2D, 7D);
xyseries1.add(3D, 6D);
xyseries1.add(4D, 8D);
xyseries1.add(5D, 4D);
xyseries1.add(6D, 4D);
xyseries1.add(7D, 2D);
xyseries1.add(8D, 1.0D);
XYSeries xyseries2 = new XYSeries("Third");
xyseries2.add(3D, 4D);
xyseries2.add(4D, 3D);
xyseries2.add(5D, 2D);
xyseries2.add(6D, 3D);
xyseries2.add(7D, 6D);
xyseries2.add(8D, 3D);
xyseries2.add(9D, 4D);
xyseries2.add(10D, 3D);
XYSeriesCollection xyseriescollection = new XYSeriesCollection(); //再用XYSeriesCollection添加入XYSeries 对象
xyseriescollection.addSeries(xyseries);
xyseriescollection.addSeries(xyseries1);
xyseriescollection.addSeries(xyseries2);
JFreeChart jfreechart = ChartFactory.createXYLineChart("Line Chart Demo 2",
"X",
"Y",
xyseriescollection,
PlotOrientation.VERTICAL,
true,
true,
false);
ChartFrame frame=new ChartFrame ("折线图 ",jfreechart,true);
frame.pack();
frame.setVisible(true);
}
private static void test5() {
TimeSeries timeseries = new TimeSeries("L&G European Index Trust",Month.class);
timeseries.add(new Month(2, 2001), 181.8D);//这里用的是Month.class，同样还有Day.class Year.class 等等
timeseries.add(new Month(3, 2001), 167.3D);
timeseries.add(new Month(4, 2001), 153.8D);
timeseries.add(new Month(5, 2001), 167.6D);
timeseries.add(new Month(6, 2001), 158.8D);
timeseries.add(new Month(7, 2001), 148.3D);
timeseries.add(new Month(8, 2001), 153.9D);
timeseries.add(new Month(9, 2001), 142.7D);
timeseries.add(new Month(10, 2001), 123.2D);
timeseries.add(new Month(11, 2001), 131.8D);
timeseries.add(new Month(12, 2001), 139.6D);
timeseries.add(new Month(1, 2002), 142.9D);
timeseries.add(new Month(2, 2002), 138.7D);
timeseries.add(new Month(3, 2002), 137.3D);
timeseries.add(new Month(4, 2002), 143.9D);
timeseries.add(new Month(5, 2002), 139.8D);
timeseries.add(new Month(6, 2002), 137D);
timeseries.add(new Month(7, 2002), 132.8D);
TimeSeries timeseries1 = new TimeSeries("L&G UK Index Trust",Month.class);
timeseries1.add(new Month(2, 2001), 129.6D);
timeseries1.add(new Month(3, 2001), 123.2D);
timeseries1.add(new Month(4, 2001), 117.2D);
timeseries1.add(new Month(5, 2001), 124.1D);
timeseries1.add(new Month(6, 2001), 122.6D);
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), 106.1D);
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), 109.6D);
timeseries1.add(new Month(4, 2002), 113.2D);
timeseries1.add(new Month(5, 2002), 111.6D);
timeseries1.add(new Month(6, 2002), 108.8D);
timeseries1.add(new Month(7, 2002), 101.6D);
TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
timeseriescollection.addSeries(timeseries);
timeseriescollection.addSeries(timeseries1);
timeseriescollection.setDomainIsPointsInTime(true); //domain轴上的刻度点代表的是时间点而不是时间段
JFreeChart jfreechart = ChartFactory.createTimeSeriesChart("Legal & General Unit Trust Prices",
"Date",
"Price Per Unit",
timeseriescollection,
true,
true,
false);
jfreechart.setBackgroundPaint(Color.white);
XYPlot xyplot = (XYPlot)jfreechart.getPlot(); //获得 plot : XYPlot!!
xyplot.setBackgroundPaint(Color.lightGray);
xyplot.setDomainGridlinePaint(Color.white);
xyplot.setRangeGridlinePaint(Color.white);
xyplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));
xyplot.setDomainCrosshairVisible(true);
xyplot.setRangeCrosshairVisible(true);
ChartFrame frame=new ChartFrame ("折线图 ",jfreechart,true);
frame.pack();
frame.setVisible(true);
}
private static void test6() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue(" 市场前期", new Double(10));
dataset.setValue(" 立项", new Double(15));
dataset.setValue(" 计划", new Double(10));
dataset.setValue(" 需求与设计", new Double(10));
dataset.setValue(" 执行控制", new Double(35));
dataset.setValue(" 收尾", new Double(10));
dataset.setValue(" 运维",new Double(10));
JFreeChart chart = ChartFactory.createPieChart3D(
" 项目进度分布", // chart title
dataset,// data
true,// include legend
true,
false
);
PiePlot3D plot=(PiePlot3D)chart.getPlot();
// 图片中显示百分比:默认方式
//plot.setLabelGenerator(new StandardPieSectionLabelGenerator(StandardPieToolTipGenerator.DEFAULT_TOOLTIP_FORMAT));
// 图片中显示百分比:自定义方式，{0} 表示选项， {1} 表示数值， {2} 表示所占比例 ,小数点后两位
plot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}={1}({2})", NumberFormat.getNumberInstance(), new DecimalFormat("0.00%")));
// 图例显示百分比:自定义方式， {0} 表示选项， {1} 表示数值， {2} 表示所占比例
plot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator("{0}={1}({2})"));
// 设置背景色为白色
chart.setBackgroundPaint(Color.white);
// 指定图片的透明度(0.0-1.0)
plot.setForegroundAlpha(1.0f);
// 指定显示的饼图上圆形(false)还椭圆形(true)
plot.setCircular(true);
// 设置图标题的字体
Font font = new Font(" 黑体",Font.CENTER_BASELINE,20);
TextTitle title = new TextTitle(" 项目状态分布");
title.setFont(font);
chart.setTitle(title);
FileOutputStream fos_jpg = null;
try {
fos_jpg=new FileOutputStream("D:\\ 项目状态分布.jpg");
ChartUtilities.writeChartAsJPEG(fos_jpg, 100, chart, 640, 480, null);
fos_jpg.close();
} catch (Exception e) {
}
}
private static void test7() {
JfreeChartOne one=new JfreeChartOne("CityInfoPort公司组织架构图");
one.pack();
one.setVisible(true);
}
}
class JfreeChartOne extends ApplicationFrame {
private static final long serialVersionUID = 1L;
public JfreeChartOne(String s)
{
super(s);
setContentPane(createJPanel());
}
//利用静态方法设定数据源(饼状图)
public static PieDataset createPieDataset() {
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;
}
// 通过ChartFactory创建JFreeChart的实例
public static JFreeChart createJFreeChart(PieDataset p)
{
JFreeChart a = ChartFactory.createPieChart("CityInfoPort公司组织架构图", p, true, true, true);
PiePlot pie=(PiePlot)a.getPlot();
pie.setLabelFont(new Font("SansSerif",Font.BOLD,12));
pie.setNoDataMessage("No data available");
pie.setCircular(true);
pie.setLabelGap(0.01D);//间距
return a;
}
public static JPanel createJPanel (){
JFreeChart jfreechart = createJFreeChart(createPieDataset());
return new ChartPanel(jfreechart);
}
}
参考文档：http://blog.csdn.net/hapylong/article/details/1633001
http://blog.csdn.net/hapylong/article/details/1633147
http://ltc603.iteye.com/blog/30207
总结一些，这里主要就介绍了如何用jfreechart输出图像，并没有和servlet结合起来。以后可以再试试如何和servlet或者web项目结合。