使用jfreechart画曲线图

pom：

<dependency> <groupId>org.jfree</groupId> <artifactId>jfreechart</artifactId> <version>1.5.0</version> </dependency> <dependency> <groupId>org.jfree</groupId> <artifactId>jcommon</artifactId> <version>1.0.24</version> </dependency>

代码：

/** * 曲线图 * * @author wzx * @date 2018-04-09 */ public class TimeSeriesChart { public static void main(String[] args) throws IOException { XYDataset xyDataset = createDataset(); JFreeChart chart = ChartFactory.createTimeSeriesChart("小时/点击数", "小时", "点击数", xyDataset, true, true, true); XYPlot plot = (XYPlot) chart.getPlot(); DateAxis dateaxis = (DateAxis) plot.getDomainAxis(); dateaxis.setDateFormatOverride(new SimpleDateFormat("HH:mm")); dateaxis.setLabelFont(new Font("黑体", Font.BOLD, 14)); //水平底部标题 dateaxis.setTickLabelFont(new Font("宋体", Font.BOLD, 12)); //垂直标题 ValueAxis rangeAxis = plot.getRangeAxis();//获取柱状 rangeAxis.setLabelFont(new Font("黑体", Font.BOLD, 15)); chart.getLegend().setItemFont(new Font("黑体", Font.BOLD, 15)); chart.getTitle().setFont(new Font("宋体", Font.BOLD, 20));//设置标题字体 FileOutputStream out = null; try { out = new FileOutputStream("C://image//2.jpg"); ChartUtils.writeChartAsJPEG(out, 0.5f, chart, 400, 300, null); } finally { try { out.close(); } catch (Exception ex) { ex.printStackTrace(); } } } private static XYDataset createDataset() { TimeSeries timeseries = new TimeSeries("点击数"); timeseries.add(new Month(2, 2001), 181.80000000000001D); timeseries.add(new Month(3, 2001), 167.30000000000001D); timeseries.add(new Month(4, 2001), 153.80000000000001D); timeseries.add(new Month(5, 2001), 167.59999999999999D); timeseries.add(new Month(6, 2001), 158.80000000000001D); timeseries.add(new Month(7, 2001), 148.30000000000001D); timeseries.add(new Month(8, 2001), 153.90000000000001D); timeseries.add(new Month(9, 2001), 142.69999999999999D); timeseries.add(new Month(10, 2001), 123.2D); timeseries.add(new Month(11, 2001), 131.80000000000001D); timeseries.add(new Month(12, 2001), 139.59999999999999D); timeseries.add(new Month(1, 2002), 142.90000000000001D); timeseries.add(new Month(2, 2002), 138.69999999999999D); timeseries.add(new Month(3, 2002), 137.30000000000001D); timeseries.add(new Month(4, 2002), 143.90000000000001D); timeseries.add(new Month(5, 2002), 139.80000000000001D); timeseries.add(new Month(6, 2002), 137D); timeseries.add(new Month(7, 2002), 132.80000000000001D); TimeSeriesCollection timeseriescollection = new TimeSeriesCollection(); timeseriescollection.addSeries(timeseries); return timeseriescollection; } }

生成的图片：