JfreeChart实现甘特图，懂的进

feifeikub 2011-06-23 03:13:18

小弟我java项目中要用到了根据时间实现甘特图的显示，描述：一天24小时在头部显示，分别有24个时间段，假如在早上8点到早上10做了一个登录功能，在图中就左边显示的是工作标题（登录功能），在时间段第八段到第十段间就有一段图的显示（如比：红色）然而在里面才是10-8=2除以24约等于0.8，在上面一段红色显示条里面再有一条比它细的绿色条占80%。
如果有条消息可以于此排下。
我这里有一个实现好的类，已经可以用了，这上面显示2001-1-1 2001-2-1...等等我想改为1 2 3.....24，我只要小时，根据小时控制长度，如果您的懂一下代码就一定知道我的意思，





package com.test.Gannt;



import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.FileOutputStream;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;



import javax.swing.JFrame;



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 <code>Date</code> 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;

    }

}