JFreeChart插件实现的折线图效果实例

摘要：本文实例讲述了JFreeChart插件实现的折线图效果。分享给大家供大家参考，具体如下：packagecom.lei.jfreechart;...

本文实例讲述了JFreeChart插件实现的折线图效果。分享给大家供大家参考，具体如下：

package com.lei.jfreechart; 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; } }

运行效果如下：

JFreeChart插件实现的折线图效果实例1