JFreeChart畫甘特圖實例

因為開發的需要,今天用JFreeChart畫了甘特圖,以下是測試用的代碼, 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("任務管理系統",
       "任務各階段詳細實施計劃",
       "任務周期",
       dataset,
           false,
           false,
           false);

   CategoryPlot plot=chart.getCategoryPlot();

   chart.getTitle().setFont(new Font("新宋體",Font.BOLD,20));
   CategoryAxis domainAxis=plot.getDomainAxis();

//水平底部列表
  domainAxis.setLabelFont(new Font("新宋體",Font.BOLD,14));
  //水平底部標題
  domainAxis.setTickLabelFont(new Font("新宋體",Font.BOLD,12));
  //垂直標題

   ValueAxis rangeAxis = plot.getRangeAxis();
   rangeAxis.setLabelFont(new Font("新宋體",Font.BOLD,16));
   //用來控制時間軸的顯示,防止亂碼
   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("任務1", date(1, Calendar.JANUARY, 2001), date(5, Calendar.APRIL, 2001));
   t1.setPercentComplete(0.8);
   s1.add(t1);
   // 創建一個任務并插入兩個子任務
   final Task t3 = new Task("任務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( "任務3", date(2, Calendar.JUNE, 2001), date(2, Calendar.JUNE, 2001));
   s1.add(t5);

   final Task t6 = new Task("任務4", date(3, Calendar.MARCH, 2001), date(31, Calendar.JULY, 2001));
   t6.setPercentComplete(0.60);

   s1.add(t6);

   final Task t8 = new Task("任務結束", date(10, Calendar.AUGUST, 2001), date(10, Calendar.AUGUST, 2001));
   t8.setPercentComplete(0.0);
   s1.add(t8);

   final Task t9 = new Task("任務試用", date(12, Calendar.AUGUST, 2001), date(12, Calendar.SEPTEMBER, 2001));
   t9.setPercentComplete(0.0);
   s1.add(t9);

   final Task t10 = new Task("任務測試", date(13, Calendar.SEPTEMBER, 2001), date(31, Calendar.OCTOBER, 2001));
   t10.setPercentComplete(0.2);
   s1.add(t10);

   final Task t12 = new Task("全部結束", 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;

}


} </pre>



效果圖: 



 

相關API: 

GanttBarRenderer(IntervalBarRenderer)類： 

void setCompletePaint(Paint paint)     完成進度顏色 

void setIncompletePaint(Paint paint)     未完成進度顏色 

void setStartPercent(double percent)     設置進度條在整條中的起始位置（0.0～1.0） 

void setEndPercent(double percent)     設置進度條在整條中的結束位置（0.0～1.0）