JFreeChart 生成雷达图（急）解决思路

JFreeChart 生成雷达图（急急！！）
环境：jdk1.4
jfreechart-1[1].0.11-demo.jar、jcommon-1[1].0.14.jar


代码：
package com.struts.dao;

import java.io.*;

import javax.swing.JFrame;
import javax.swing.JPanel;

import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.LegendTitle;
import org.jfree.chart.TextTitle;
import org.jfree.data.DefaultCategoryDataset;


/**
 * @author Administrator
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class CreateJFreeChartLDImage{

public static void main(String args[]) { 
//在SWING中显示 
JFrame jf = new JFrame(); 
jf.add(erstelleSpinnenDiagramm()); 
jf.pack(); 
jf.setVisible(true); 

//将JFreeChart保存为图片存在文件路径中 
saveAsFile("C:/MySpiderWebPlot.png",500,400); 
} 
public static JPanel erstelleSpinnenDiagramm() { 
JFreeChart jfreechart = createChart(); 
ChartPanel chartpanel = new ChartPanel(jfreechart); 
return chartpanel; 
} 


public static void saveAsFile(String outputPath, 
int weight, int height) { 
FileOutputStream out = null; 
try { 
File outFile = new File(outputPath); 
if (!outFile.getParentFile().exists()) { 
outFile.getParentFile().mkdirs(); 
} 
out = new FileOutputStream(outputPath);

// 保存为PNG 
ChartUtilities.writeChartAsPNG(out, createChart(),weight, height); 
// 保存为JPEG 
// ChartUtilities.writeChartAsJPEG(out, chart, 500, 400); 
out.flush(); 
}catch (FileNotFoundException e){ 
e.printStackTrace(); 
}catch (IOException e){ 
e.printStackTrace(); 
}finally{ 
if(out != null){ 
try { 
out.close(); 
}catch (IOException e){ 
// do nothing 
} 
} 
} 
} 
public static JFreeChart createChart() { 

MySpiderWebPlot spiderwebplot = new MySpiderWebPlot(createDataset()); 

JFreeChart jfreechart = new JFreeChart("前三个季度水果销售报告", TextTitle.DEFAULT_FONT,spiderwebplot, false); 
LegendTitle legendtitle = new LegendTitle(spiderwebplot); 
legendtitle.setPosition(1); 
jfreechart.addSubtitle(legendtitle); 



return jfreechart; 
} 
public static DefaultCategoryDataset createDataset() { 
DefaultCategoryDataset dataset = new DefaultCategoryDataset(); 
String group1 = "苹果 "; 
 
dataset.addValue(5, group1, "一月份"); 
dataset.addValue(6, group1, "二月份"); 
dataset.addValue(4, group1, "三月份"); 
dataset.addValue(2, group1, "四月份"); 
dataset.addValue(5, group1, "五月份"); 
dataset.addValue(5, group1, "六月份"); 
dataset.addValue(5, group1, "七月份"); 
dataset.addValue(8, group1, "八月份"); 
 
String group2 = "橙子"; 
dataset.addValue(3, group2, "一月份"); 
dataset.addValue(3, group2, "二月份"); 
dataset.addValue(4, group2, "三月份"); 
dataset.addValue(7, group2, "四月份"); 
dataset.addValue(4, group2, "五月份"); 
dataset.addValue(5, group2, "六月份"); 
dataset.addValue(3, group2, "七月份");