JFreeChart 饼图demo
package com.voole.jfreeChart;
import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.IOException;
import javax.swing.*;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
public class BingTu extends JFrame {
public static void main(String[] args) throws IOException{
PieDataset dataset = getDataSet();
JFreeChart chart = ChartFactory.createPieChart3D(
"招生信息总览", // 图表标题
dataset, // 数据集
true, // 是否显示图例(对于简单的柱状图必须是false)
true, // 是否生成工具
true // 是否生成URL链接
);
chart.setBackgroundPaint(Color.WHITE);
Font font = new Font("SimSun", 10, 20);
TextTitle title = chart.getTitle();
title.setFont(font);
LegendTitle legendTitle = chart.getLegend();
legendTitle.setItemFont(font);
PiePlot pieplot = (PiePlot) chart.getPlot();
pieplot.setLabelFont(font);
// 设置图表的颜色
org.jfree.chart.renderer.category.BarRenderer3D renderer;
renderer = new org.jfree.chart.renderer.category.BarRenderer3D();
renderer.setBaseOutlinePaint(Color.red);
try {
File file = new File("c:/student.png");
ChartUtilities.saveChartAsPNG(file,chart,400,300);// 把报表保存为文件
}catch (Exception e) {
String s = e.getLocalizedMessage();
s = e.getMessage();
s = e.toString();
}
// 将生成的报表放到预览窗口中
ChartFrame preview = new ChartFrame("招生信息",chart);
preview.addWindowListener(new WindowAdapter() {
public void windowClosing(final WindowEvent event) {
// preview.dispose();
}
});
preview.pack();
// 调整预览窗口的大小和位置,适合屏幕，并且居中
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
preview.setSize(screenSize.width,screenSize.height-50);// 适合屏幕，50表示把工具栏要考虑在内
Dimension frameSize = preview.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
preview.setLocation( (screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height-50) / 2);
// 显示报表预览窗口
preview.setVisible(true);
}
/**
*
* 获取一个演示用的组合数据集对象
*
* @return
*
*/
private static PieDataset getDataSet() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("苹果", 100);
dataset.setValue("梨", 200);
dataset.setValue("葡萄", 300);
return dataset;
}
}