使用JFreeChart创建时间顺序图

最新推荐文章于 2017-10-18 15:14:50 发布

iteye_15315

最新推荐文章于 2017-10-18 15:14:50 发布

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分类专栏： JFreeChart 文章标签： jfreechart Spring Java UP

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package com.cs.jfreechart;

import java.awt.Color;
import java.awt.Font;
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.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.time.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;

public class TimeChartDemo {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		//生成时间顺序图
		JFreeChart chart = ChartFactory.createTimeSeriesChart (
				"图书销售统计表",     //图表标题
				"图书",             //目录轴的显示标签
				"销量",             //数值轴的显示标签
				getDateSet(),      //数据
				//PlotOrientation.HORIZONTAL, //图表方向水平
				//PlotOrientation.VERTICAL,    //图表方向垂直
				true,             //是否显示图例
				false,            //是否显示工具提示
				false             //是否生成URL
		);
		//设置标题及标题字体
		chart.setTitle(new TextTitle("图书销售统计图",new Font("黑体",Font.ITALIC,22)));
		//建一个图例
		LegendTitle legendTitle = chart.getLegend(0);
		//设置图例字体
		legendTitle.setItemFont(new Font("宋体",Font.BOLD,14));
		//获取时间顺序图plot对象
		XYPlot plot = (XYPlot) chart.getPlot();
		//设置柱型的颜色
		plot.getRenderer().setSeriesPaint(0, Color.blue);
		//取得横轴
		ValueAxis categoryAxis = plot.getDomainAxis();
		//设置横轴的字体
		categoryAxis.setLabelFont(new Font("宋体",Font.BOLD,22));
		//设置分类标签以45度倾斜
		//categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
		//设置分类标签字体
		categoryAxis.setTickLabelFont(new Font("宋体",Font.BOLD,22));
		//取得纵轴
		NumberAxis numberAxis = (NumberAxis) plot.getRangeAxis();
		//设置纵轴的字体
		numberAxis.setLabelFont(new Font("宋体",Font.BOLD,22));
		//设置背景透明度（0~1）
		plot.setBackgroundAlpha(0.9f);
		//输出文件
		FileOutputStream fos = new FileOutputStream("book.jpg");
		//用ChartUtilities工具输出
		ChartUtilities.writeChartAsJPEG(fos, chart, 800, 600);
		fos.close();
	}

	private static XYDataset getDateSet() {
		//创建一个TimeSeries对象
		TimeSeries spring = new TimeSeries("JAVA教程",Month.class);
		spring.add(new Month(10,2006),34);
		spring.add(new Month(11,2006),27);
		spring.add(new Month(12,2006),31);
		spring.add(new Month(1,2007),17);
		spring.add(new Month(2,2007),39);

		TimeSeries lightweight = new TimeSeries("C#教程",Month.class);
		lightweight.add(new Month(10,2006),28);
		lightweight.add(new Month(11,2006),32);
		lightweight.add(new Month(12,2006),11);
		lightweight.add(new Month(1,2007),19);
		lightweight.add(new Month(2,2007),12);

		TimeSeriesCollection dataset = new TimeSeriesCollection();
		dataset.addSeries(spring);
		dataset.addSeries(lightweight);
		return dataset;
	}

}