package com.bjsxt.shopping.test;
import java.io.FileOutputStream;
import java.io.IOException;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
/**
 * 該類用于演示最簡(jiǎn)單的柱狀圖生成
 * @author Winter Lau
 */
public class BarChartDemo {
	public static void main(String[] args) throws IOException{
		CategoryDataset dataset = getDataSet();
		JFreeChart chart = ChartFactory.createBarChart3D(
							"水果產(chǎn)量圖", // 圖表標(biāo)題
							"水果", // 目錄軸的顯示標(biāo)簽
							"產(chǎn)量", // 數(shù)值軸的顯示標(biāo)簽
							dataset, // 數(shù)據(jù)集
							PlotOrientation.VERTICAL, // 圖表方向：水平、垂直
							true, 	// 是否顯示圖例(對(duì)于簡(jiǎn)單的柱狀圖必須是false)
							false, 	// 是否生成工具
							false 	// 是否生成URL鏈接
							);
							
		FileOutputStream fos_jpg = null;
		try {
			fos_jpg = new FileOutputStream("D:\\fruit.jpg");
			ChartUtilities.writeChartAsJPEG(fos_jpg,1,chart,400,300,null);
		} finally {
			try {
				fos_jpg.close();
			} catch (Exception e) {}
		}
	}
	/**
	 * 獲取一個(gè)演示用的簡(jiǎn)單數(shù)據(jù)集對(duì)象
	 * @return
	 */
	private static CategoryDataset getDataSet() {
		DefaultCategoryDataset dataset = new DefaultCategoryDataset();
		dataset.addValue(100, "aaa", "蘋果");
		dataset.addValue(200, "aaa", "梨子");
		dataset.addValue(300, "aaa", "葡萄");
		dataset.addValue(400, "aaa", "香蕉");
		dataset.addValue(500, "aaa", "荔枝");
		return dataset;
	}
	/**
	 * 獲取一個(gè)演示用的組合數(shù)據(jù)集對(duì)象
	 * @return
	 */
	private static CategoryDataset getDataSet2() {
		DefaultCategoryDataset dataset = new DefaultCategoryDataset();
		dataset.addValue(100, "北京", "蘋果");
		dataset.addValue(100, "上海", "蘋果");
		dataset.addValue(100, "廣州", "蘋果");
		dataset.addValue(200, "北京", "梨子");
		dataset.addValue(200, "上海", "梨子");
		dataset.addValue(200, "廣州", "梨子");
		dataset.addValue(300, "北京", "葡萄");
		dataset.addValue(300, "上海", "葡萄");
		dataset.addValue(300, "廣州", "葡萄");
		dataset.addValue(400, "北京", "香蕉");
		dataset.addValue(400, "上海", "香蕉");
		dataset.addValue(400, "廣州", "香蕉");
		dataset.addValue(500, "北京", "荔枝");
		dataset.addValue(500, "上海", "荔枝");
		dataset.addValue(500, "廣州", "荔枝");
		return dataset;
	}
}