JFreeChart画甘特图实例
jopen
12年前
因为开发的需要,今天用JFreeChart画了甘特图,以下是测试用的代码, 分享一下:
package net.task.core.chart; import java.awt.Font; import java.io.FileOutputStream; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; 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.DateAxis; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.CategoryPlot; import org.jfree.data.category.IntervalCategoryDataset; import org.jfree.data.gantt.Task; import org.jfree.data.gantt.TaskSeries; import org.jfree.data.gantt.TaskSeriesCollection; /** * @author Danny * * TODO To change the template for this generated type comment go to * Window - Preferences - Java - Code Style - Code Templates */ public class GanttChart{ public static void main(String[] args) { IntervalCategoryDataset dataset = createSampleDataset(); JFreeChart chart = ChartFactory.createGanttChart("任务管理系统", "任务各阶段详细实施计划", "任务周期", dataset, false, false, false); CategoryPlot plot=chart.getCategoryPlot(); chart.getTitle().setFont(new Font("新宋体",Font.BOLD,20)); CategoryAxis domainAxis=plot.getDomainAxis(); //水平底部列表 domainAxis.setLabelFont(new Font("新宋体",Font.BOLD,14)); //水平底部标题 domainAxis.setTickLabelFont(new Font("新宋体",Font.BOLD,12)); //垂直标题 ValueAxis rangeAxis = plot.getRangeAxis(); rangeAxis.setLabelFont(new Font("新宋体",Font.BOLD,16)); //用来控制时间轴的显示,防止乱码 DateAxis da = (DateAxis)plot.getRangeAxis(0); da.setDateFormatOverride(new SimpleDateFormat("yyyy-MM-dd")); FileOutputStream fop = null; try{ System.out.println("Danny>> begin."); fop = new FileOutputStream("D:gantt.jpg"); ChartUtilities.writeChartAsJPEG(fop,1f, chart, 800, 600,null); System.out.println("Danny>> end.."); System.out.println("Danny>> successful..."); } catch (IOException e){ e.printStackTrace(); } finally{ try{ fop.close(); } catch (IOException e){ e.printStackTrace(); } } } /** *//** * Utility method for creating Date objects. * * @param day 日 * @param month 月 * @param year 年 * * @return a date. */ private static Date date(final int day, final int month, final int year){ final Calendar calendar = Calendar.getInstance(); calendar.set(year, month, day); final Date result = calendar.getTime(); return result; } /** * * @return The dataset. */ private static IntervalCategoryDataset createSampleDataset() { final TaskSeries s1 = new TaskSeries("SCHEDULE"); final Task t1 = new Task("任务1", date(1, Calendar.JANUARY, 2001), date(5, Calendar.APRIL, 2001)); t1.setPercentComplete(0.8); s1.add(t1); // 创建一个任务并插入两个子任务 final Task t3 = new Task("任务2", date(10, Calendar.APRIL, 2001), date(5, Calendar.MAY, 2001)); final Task st31 = new Task("需求1", date(10, Calendar.APRIL, 2001), date(25, Calendar.APRIL, 2001)); st31.setPercentComplete(0.50); final Task st32 = new Task("需求2", date(1, Calendar.MAY, 2001), date(5, Calendar.MAY, 2001)); st32.setPercentComplete(1.0); t3.addSubtask(st31); t3.addSubtask(st32); s1.add(t3); final Task t5 = new Task( "任务3", date(2, Calendar.JUNE, 2001), date(2, Calendar.JUNE, 2001)); s1.add(t5); final Task t6 = new Task("任务4", date(3, Calendar.MARCH, 2001), date(31, Calendar.JULY, 2001)); t6.setPercentComplete(0.60); s1.add(t6); final Task t8 = new Task("任务结束", date(10, Calendar.AUGUST, 2001), date(10, Calendar.AUGUST, 2001)); t8.setPercentComplete(0.0); s1.add(t8); final Task t9 = new Task("任务试用", date(12, Calendar.AUGUST, 2001), date(12, Calendar.SEPTEMBER, 2001)); t9.setPercentComplete(0.0); s1.add(t9); final Task t10 = new Task("任务测试", date(13, Calendar.SEPTEMBER, 2001), date(31, Calendar.OCTOBER, 2001)); t10.setPercentComplete(0.2); s1.add(t10); final Task t12 = new Task("全部结束", date(28, Calendar.NOVEMBER, 2001), date(30, Calendar.NOVEMBER, 2001)); t12.setPercentComplete(0.0); s1.add(t12); final TaskSeriesCollection collection = new TaskSeriesCollection(); collection.add(s1); return collection; } } 效果图:
相关API:
GanttBarRenderer(IntervalBarRenderer)类：
void setCompletePaint(Paint paint) 完成进度颜色
void setIncompletePaint(Paint paint) 未完成进度颜色
void setStartPercent(double percent) 设置进度条在整条中的起始位置（0.0～1.0）
void setEndPercent(double percent) 设置进度条在整条中的结束位置（0.0～1.0）