JSP/Java 生成柱状图、饼状图...等复杂的图形 基于jfreechart

]<%@page language="java" pageEncoding="UTF-8"%>
<%@page import="org.jfree.data.category.*,org.jfree.chart.*,org.jfree.chart.plot.*"%>
<%
out.clearBuffer();
response.setContentType("image/jpeg");
DefaultCategoryDataset dataset=new DefaultCategoryDataset();
dataset.addValue(610,"taian","test1");
dataset.addValue(540,"taian","test2");
dataset.addValue(320,"taian","test3");
dataset.addValue(370,"taian","test4");
dataset.addValue(130,"taian","test5");
JFreeChart chart=ChartFactory.createBarChart("BiangJi","xiaoliang","roulei",dataset,PlotOrientation.VERTICAL,false,false,false);
java.io.OutputStream os=response.getOutputStream();
javax.imageio.ImageIO.write(chart.createBufferedImage(500,300),"JPEG",os);
os.flush();
os.close();
%>

]import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.data.general.DefaultPieDataset;
public class First {
public static void main(String[] args) {

DefaultPieDataset data=new DefaultPieDataset();
data.setValue("Catagory 1",43.2);
data.setValue("Catagory 2",27.9);
data.setValue("Catagory 3",79.5);
JFreeChart chart=ChartFactory.createPieChart("Sample Pie Chart",data,true,true,false);
ChartFrame frame=new ChartFrame("First",chart);
frame.pack();
frame.setVisible(true);
}
}