最近由于项目需要，需要在网页中生成甘特图，在网上浏览资料之后，***通过JFreeChart实现了在jsp页面画甘特图。
在此就与大家分享一下我的收获。
首先把重要的代码粘出来供大家参考，项目源码和数据库信息表，以及参考的资料和一些资料的网址我就打包放在下面，大家可以下载后学习参考。
ProgressControl.java//完成从数据库读数据，生成甘特图。
- package com.angrybirds.DAO;
- import java.io.IOException;
- import java.io.PrintWriter;
- //import java.util.Date;
- import java.sql.*;
- import java.util.ArrayList;
- import java.util.ListIterator;
- import javax.servlet.http.HttpSession;
- import org.jfree.chart.ChartFactory;
- import org.jfree.chart.ChartRenderingInfo;
- import org.jfree.chart.ChartUtilities;
- import org.jfree.chart.JFreeChart;
- import org.jfree.chart.entity.StandardEntityCollection;
- import org.jfree.chart.servlet.ServletUtilities;
- import org.jfree.data.gantt.Task;
- import org.jfree.data.gantt.TaskSeries;
- import org.jfree.data.gantt.TaskSeriesCollection;
- public class ProgressControl {
- public static String createPlanGanttChart(String missionId,String missionName,HttpSession session,PrintWriter pw){
- String fileName = null;
- Connection conn = null;
- Statement stmt = null;
- ResultSet rs = null;
- String sql = null;
- String sql2 = null;
- ArrayList nameList = new ArrayList();
- ArrayList startList = new ArrayList();
- ArrayList endList = new ArrayList();
- conn = DB.getConnection();
- stmt = DB.getStatement(conn);
- sql = "select * from SQLJ.Pro_control"; // where Task_id = '" + missionId + "'";
- //System.out.println(sql);
- rs = DB.getResultSet(stmt, sql);
- try {
- while(rs.next()){
- nameList.add(rs.getString("Task_name"));
- startList.add(rs.getDate("Plan_starttime"));
- endList.add(rs.getDate("Plan_endtime"));
- }
- } catch (SQLException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- ListIterator iterN = nameList.listIterator();
- ListIterator iterS = startList.listIterator();
- ListIterator iterE = endList.listIterator();
- TaskSeriesCollection tsc = new TaskSeriesCollection();
- TaskSeries tsPlan = new TaskSeries("Plan");
- while(iterN.hasNext()){
- String submissionName = (String)iterN.next();
- java.util.Date sDate = (java.util.Date)iterS.next();
- java.util.Date eDate = (java.util.Date)iterE.next();
- if(sDate.before(eDate)){
- Task task = new Task(submissionName,sDate,eDate);
- tsPlan.add(task);
- }
- else{}
- }
- tsc.add(tsPlan);//tsc.add(tsPlan);
- JFreeChart chart = ChartFactory.createGanttChart(missionName + "GanttProject", "Project", "Time", tsc, true, true, true);
- ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
- try {
- fileName = ServletUtilities.saveChartAsPNG(chart, 500, 80+65*nameList.size(), info,session);
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- try {
- ChartUtilities.writeImageMap(pw, fileName, info,true);
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- try {
- rs.close();
- stmt.close();
- conn.close();
- } catch (SQLException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- pw.flush();
- //System.out.println(fileName);
- return fileName;
- }
- public static String createRealGanttChart(String missionId,String missionName,HttpSession session,PrintWriter pw){
- String fileName = null;
- Connection conn = null;
- Statement stmt = null;
- ResultSet rs = null;
- String sql = null;
- String sql2 = null;
- ArrayList nameList = new ArrayList();
- ArrayList startList = new ArrayList();
- ArrayList endList = new ArrayList();
- conn = DB.getConnection();
- stmt = DB.getStatement(conn);
- sql = "select * from SQLJ.Pro_control"; // where Task_id = '" + missionId + "'";
- //System.out.println(sql);
- rs = DB.getResultSet(stmt, sql);
- try {
- while(rs.next()){
- nameList.add(rs.getString("Task_name"));
- startList.add(rs.getDate("Reality_starttime"));
- endList.add(rs.getDate("Reality_endtime"));
- }
- } catch (SQLException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- //rs = null;
- //System.out.println("over:1");
- ListIterator iterN = nameList.listIterator();
- ListIterator iterS = startList.listIterator();
- ListIterator iterE = endList.listIterator();
- TaskSeriesCollection tsc = new TaskSeriesCollection();
- //TaskSeries tsPlan = new TaskSeries("Plan");
- TaskSeries tsReal = new TaskSeries("Real");
- while(iterN.hasNext()){
- String submissionName = (String)iterN.next();
- java.util.Date sDate = (java.util.Date)iterS.next();
- java.util.Date eDate = (java.util.Date)iterE.next();
- if(sDate.before(eDate)){
- Task task = new Task(submissionName,sDate,eDate);
- tsReal.add(task);
- }
- else{}
- }
- tsc.add(tsReal);//tsc.add(tsPlan);
- JFreeChart chart = ChartFactory.createGanttChart(missionName + "GanttProject", "Project", "Time", tsc, true, true, true);
- ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
- try {
- fileName = ServletUtilities.saveChartAsPNG(chart, 500, 80+65*nameList.size(), info,session);
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- try {
- ChartUtilities.writeImageMap(pw, fileName, info,true);
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- try {
- rs.close();
- stmt.close();
- conn.close();
- } catch (SQLException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- pw.flush();
- //System.out.println(fileName);
- return fileName;
- }
- }
我把计划任务和实际任务分开画的甘特图，所以有两个甘特图的jsp页面
PlanGantt.jsp
- <%@ page language="java" import="java.util.*,java.io.*" %>
- <%@ page import="com.angrybirds.DAO.ProgressControl"%>
- <%
- String path = request.getContextPath();
- String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
- %>
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN">
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
- <title>AngryBirds</title>
- <link href="css.css" rel="stylesheet" type="text/css" />
- <meta http-equiv="pragma" content="no-cache">
- <meta http-equiv="cache-control" content="no-cache">
- <meta http-equiv="expires" content="0">
- <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
- <meta http-equiv="description" content="This is my page">
- </head>
- <body>
- <div class="size">
- <div class="header">
- <div class="header01">
- <div class="logo"> <img src="image/img_15.bmp" alt="" /> </div>
- </div>
- <div class="cmainimg"> <img alt="" src="image/img_73.jpg" /> </div>
- <div class="mnav"> <img class="mnimgl" src="image/img_37.jpg" alt="" /> <img class="mnimgr" src="image/img_50.jpg" alt="" />
- <div class="mnm">
- <ul>
- </ul>
- </div>
- </div>
- </div>
- <div class="content">
- <div class="submenu" style="left: 0px; top: 0px"> <img class="snimgl" src="image/img_96.jpg" alt="" /> <img class="snimgr" src="image/img_107.jpg" alt="" />
- <div class="subtext"> You are here:Home </div>
- <div class="subimag" style="width: 41px; height: 51px">
- <ul>
- <li>1</li>
- <li>2</li>
- <li>3</li>
- </ul>
- </div>
- </div>
- <div class="mcontent">
- <!--***************************************************************************×ó/-->
- <!--***************************************************************************ÓÒ/-->
- <div align="center" class="mcmid3">
- <%
- String missionId = "1";
- String filename = ProgressControl.createPlanGanttChart(missionId,"AllProject",session,new PrintWriter(out));
- String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;
- %>
- <img src="<%=graphURL %>" width="500" height="300" border="0" usemap="#<%=filename %>">
- </div>
- <!--***************************************************************************/-->
- </div>
- </div>
- <div class="footer"> <img class="mnimgl" src="image/img_275.jpg" alt="" /> <img class="mnimgr" src="image/img_291.jpg" alt="" /> <a href="http://www.88web.org/">HOME</a> | <a href="http://www.88web.org/">ABOUT US</a> | <a href="http://www.88web.org/">GALLERY</a> | <a href="http://www.88web.org/">FAQ</a> | <a href="http://www.88web.org/">SERVICES</a> | <a href="http://www.88web.org/">CONTACT</a> <br/>
- <font color="#333333">Copyright 2009 Your Website | <a style="color: #333333" href="http://www.88web.org/css-templates/">CSS Template</a> by <a style="color: #333333" href="http://www.88web.org/">AngryBirds</a></font></div>
- </div>
- </body>
- </html>
RealGantt.jsp
- <%@ page language="java" import="java.util.*,java.io.*" pageEncoding="GBK"%>
- <%@ page import="com.angrybirds.DAO.ProgressControl"%>
- <%
- String path = request.getContextPath();
- String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
- %>
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN">
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
- <title>AngryBirds</title>
- <link href="css.css" rel="stylesheet" type="text/css" />
- <meta http-equiv="pragma" content="no-cache">
- <meta http-equiv="cache-control" content="no-cache">
- <meta http-equiv="expires" content="0">
- <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
- <meta http-equiv="description" content="This is my page">
- </head>
- <body>
- <div class="size">
- <div class="header">
- <div class="header01">
- <div class="logo"> <img src="image/img_15.bmp" alt="" /> </div>
- </div>
- <div class="cmainimg"> <img alt="" src="image/img_73.jpg" /> </div>
- <div class="mnav"> <img class="mnimgl" src="image/img_37.jpg" alt="" /> <img class="mnimgr" src="image/img_50.jpg" alt="" />
- <div class="mnm">
- <ul>
- </ul>
- </div>
- </div>
- </div>
- <div class="content">
- <div class="submenu" style="left: 0px; top: 0px"> <img class="snimgl" src="image/img_96.jpg" alt="" /> <img class="snimgr" src="image/img_107.jpg" alt="" />
- <div class="subtext"> You are here:Home </div>
- <div class="subimag" style="width: 41px; height: 51px">
- <ul>
- <li>1</li>
- <li>2</li>
- <li>3</li>
- </ul>
- </div>
- </div>
- <div class="mcontent">
- <!--***************************************************************************左/-->
- <!--***************************************************************************右/-->
- <div align="center" class="mcmid3">
- <%
- String missionId = "1";
- String filename = ProgressControl.createRealGanttChart(missionId,"AllProject",session,new PrintWriter(out));
- String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;
- %>
- <img src="<%=graphURL %>" width="500" height="300" border="0" usemap="#<%=filename %>">
- </div>
- <!--***************************************************************************/-->
- </div>
- </div>
- <div class="footer"> <img class="mnimgl" src="image/img_275.jpg" alt="" /> <img class="mnimgr" src="image/img_291.jpg" alt="" /> <a href="http://www.88web.org/">HOME</a> | <a href="http://www.88web.org/">ABOUT US</a> | <a href="http://www.88web.org/">GALLERY</a> | <a href="http://www.88web.org/">FAQ</a> | <a href="http://www.88web.org/">SERVICES</a> | <a href="http://www.88web.org/">CONTACT</a> <br/>
- <font color="#333333">Copyright 2009 Your Website | <a style="color: #333333" href="http://www.88web.org/css-templates/">CSS Template</a> by <a style="color: #333333" href="http://www.88web.org/">AngryBirds</a></font></div>
- </div>
- </body>
- </html>
此图为效果图：（由于我用的是DB2所以时间显示有点问题，如果要想甘特图有更好的显示效果可以参考API文档中相关类和方法
地址：http://www.jfree.org/jfreechart/api/javadoc/index.html）
原文链接：http://769672133.iteye.com/blog/1015897
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