java程序使用JfreeChart画折线图

一段简单的使用JfreeChart绘制折线图的java程序实现一个小例子。

package org.ncut.decloud.linecharts;

import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class LineCharts extends ApplicationFrame {
	/** * */
	private static final long serialVersionUID = 1L;

	public LineCharts(String s) {
		super(s);
		setContentPane(createDemoLine());
	}

	public static void main(String[] args) {
		LineCharts fjc = new LineCharts("折线图");
		fjc.pack();
		RefineryUtilities.centerFrameOnScreen(fjc);
		fjc.setVisible(true);

	}// 生成显示图表的面板

	public static JPanel createDemoLine() {
		JFreeChart jfreechart = createChart(createDataset());
		return new ChartPanel(jfreechart);
	}// 生成图表主对象JFreeChart

	public static JFreeChart createChart(DefaultCategoryDataset linedataset) { // 定义图表对象
		JFreeChart chart = ChartFactory.createLineChart("一季度销售曲线", // 折线图名称
				"时间", // 横坐标名称
				"销售额(百万)", // 纵坐标名称
				linedataset, // 数据
				PlotOrientation.VERTICAL, // 水平显示图像
				true, // include legend
				true, // tooltips
				false // urls
				);
		CategoryPlot plot = chart.getCategoryPlot();
		plot.setRangeGridlinesVisible(true); // 是否显示格子线
		plot.setBackgroundAlpha(0.3f); // 设置背景透明度
		NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
		rangeAxis.setAutoRangeIncludesZero(true);
		rangeAxis.setUpperMargin(0.20);
		rangeAxis.setLabelAngle(Math.PI / 2.0);
		return chart;
	}// 生成数据

	public static DefaultCategoryDataset createDataset() {
		DefaultCategoryDataset linedataset = new DefaultCategoryDataset();
		// 各曲线名称
		String series1 = "冰箱";
		String series2 = "彩电";
		String series3 = "洗衣机";
		// 横轴名称(列名称)
		String type1 = "1月";
		String type2 = "2月";
		String type3 = "3月";
		linedataset.addValue(0.0, series1, type1);
		linedataset.addValue(4.2, series1, type2);
		linedataset.addValue(3.9, series1, type3);
		linedataset.addValue(1.0, series2, type1);
		linedataset.addValue(5.2, series2, type2);
		linedataset.addValue(7.9, series2, type3);
		linedataset.addValue(2.0, series3, type1);
		linedataset.addValue(9.2, series3, type2);
		linedataset.addValue(8.9, series3, type3);
		return linedataset;
	}
}

 

经师兄推荐一个画图工具gnuplot貌似更好使，配套gsl计算函数库，号称能代替matlab。下一步学习使用上。

 

java实现实现柱状图 饼状图的实例：http://blog.csdn.net/xuexin25java/article/details/7920476