JFreeChart简略例子-饼图、折线图

 上午完成了JFreeChart绘制饼图、折线图两种。整体上感觉JFreeChart功能还是比较强大的，只是没有很好的文档，官方网站上的是要收费的。网上找了一些，也只是基本的，然后雷同事也给了我一个word文档，这些基本上也够我画这个JFreeChart的图了。JFreeChart每一个类的方法封装过多，这是我的感觉，有的时候找一个东西有点麻烦，对中文的支持也不是很好，每次画图的时候还要自己设置字体，否则中文就是乱码。

    以下是2个完成的例子（当然JFreeChart的包还是要自己加一下的，可以到http://www.jfree.org/jfreechart/上去下载）

package com.cjnetwork.testjfreechart.aatest;

import java.awt.Font;
import java.io.File;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;

public class TestJFreeChart {

	public static void main(String[] args) throws Exception{
		
		System.out.println("start...");
		
		//测试饼图
		testPieChart();
		
		//测试折线图
		testLineChart();
		
		System.out.println("complete...");
	}

	/**
	 * 
	 * 测试饼图
	 * 
	 * cjnetwork 2010-11-17下午05:21:15
	 */
	private static void testPieChart() throws Exception{
		DefaultPieDataset dataset = new DefaultPieDataset();
		
		dataset.setValue("初中", 25);
		dataset.setValue("高中", 55);
		dataset.setValue("大学", 100);
		
		JFreeChart chart = ChartFactory.createPieChart3D("学历分布图", dataset, true, true, true);
		
		Font font = new Font("黑体", Font.BOLD, 15);
		chart.getTitle().setFont(font);
		chart.getLegend().setItemFont(font);
		((PiePlot)chart.getPlot()).setLabelFont(font);
		
		ChartFrame frame = new ChartFrame("学历分布图", chart);
		frame.pack();
		frame.setVisible(true);
		ChartUtilities.saveChartAsJPEG(new File("d:/testPieChart.jpg"), chart, 1024, 768);
	}

	/**
	 * 
	 * 测试折线图
	 * 
	 * cjnetwork 2010-11-17下午05:21:07
	 */
	private static void testLineChart() throws Exception{
		
		DefaultCategoryDataset dataset = new DefaultCategoryDataset();
		
		dataset.addValue(100, "苹果", "2010-10-01");
		dataset.addValue(150, "香蕉", "2010-10-01");
		dataset.addValue(130, "葡萄", "2010-10-01");
		dataset.addValue(120, "梨", "2010-10-01");
		
		dataset.addValue(110, "苹果", "2010-10-02");
		dataset.addValue(160, "香蕉", "2010-10-02");
		dataset.addValue(70, "葡萄", "2010-10-02");
		dataset.addValue(145, "梨", "2010-10-02");
		
		dataset.addValue(150, "苹果", "2010-10-03");
		dataset.addValue(168, "香蕉", "2010-10-03");
		dataset.addValue(60, "葡萄", "2010-10-03");
		dataset.addValue(148, "梨", "2010-10-03");
		
		dataset.addValue(140, "苹果", "2010-10-04");
		dataset.addValue(190, "香蕉", "2010-10-04");
		dataset.addValue(60, "葡萄", "2010-10-04");
		dataset.addValue(163, "梨", "2010-10-04");
		
		JFreeChart chart = ChartFactory.createLineChart("水果产量图", "时间", "产量", dataset, PlotOrientation.VERTICAL, true, true, true);
		CategoryPlot plot = chart.getCategoryPlot();
		plot.getRangeAxis().setUpperMargin(0.15);
		
		Font font = new Font("黑体", Font.BOLD, 15);
		chart.getLegend().setItemFont(font);
		chart.getTitle().setFont(font);
		plot.getDomainAxis().setTickLabelFont(font);
		plot.getDomainAxis().setLabelFont(font);
		plot.getRangeAxis().setLabelFont(font);
		
		LineAndShapeRenderer lineAndShapeRenderer = (LineAndShapeRenderer) plot.getRenderer();
		lineAndShapeRenderer.setBaseLinesVisible(true);
		lineAndShapeRenderer.setBaseShapesVisible(true);
		lineAndShapeRenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
		lineAndShapeRenderer.setBaseItemLabelsVisible(true);
		
		ChartFrame frame = new ChartFrame("水果产量图", chart);
		frame.pack();
		frame.setVisible(true);	
		
		ChartUtilities.saveChartAsJPEG(new File("d:/testLineChart.jpg"), chart, 1024, 768);
	}
	
	
}