jfreechart 时序图，生成图表

1 最终效果图

2 代码

package com.cpcnet.util;import java.awt.Color;
import java.awt.Font;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.NumberFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;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.axis.DateAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.labels.StandardXYToolTipGenerator;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.servlet.ServletUtilities;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.time.Day;
import org.jfree.data.time.Minute;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.RectangleInsets;/**
* @author caiwb 曲线图的绘制
*/
public class JFreeChartUtil
{/*** 返回生成图片的文件名* @param session* @param pw* @return 生成图片的文件名* @throws ParseException */public JFreeChart getLineXYChart( XYDataset dataset,String downOrUpStream,String timeStr) throws ParseException{//初始化chart的x值String xName = this.getXName(timeStr);String fileName = null;//建立JFreeChartJFreeChart chart = ChartFactory.createTimeSeriesChart(downOrUpStream, // titlexName, // x-axis label"", // y-axis labeldataset, // datatrue, // create legend?true, // generate tooltips?false // generate URLs?);
//        //设置JFreeChart的显示属性,对图形外部部分进行调整
//        chart.setBackgroundPaint(Color.gray);//设置曲线图背景色//设置字体大小，形状Font font = new Font("宋体", Font.BOLD, 16);TextTitle title = new TextTitle(downOrUpStream, font);chart.setTitle(title);XYPlot plot = (XYPlot) chart.getPlot();//获取图形的画布plot.setBackgroundPaint(Color.white);//设置网格背景色plot.setDomainGridlinePaint(Color.gray);//设置网格竖线(Domain轴)颜色plot.setRangeGridlinePaint(Color.gray);//设置网格横线颜色plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));//设置曲线图与xy轴的距离plot.setDomainCrosshairVisible(true);plot.setRangeCrosshairVisible(true);plot.setNoDataMessage("no data");XYItemRenderer r = plot.getRenderer();//设置整个chart背景颜色Color c = new Color(230,230,230);chart.setBackgroundPaint(c);//设置ValueAxis类ValueAxis valueAxis = plot.getDomainAxis();valueAxis.setAutoTickUnitSelection(true);//      设置 x轴最大值和最小值this.setXValue(plot, timeStr);
//        dateAxis.setRange(this.changeStingToDate("2015-02-01 00:00:00"),this.changeStingToDate("2015-02-27 23:59:59")); ////设置Y轴NumberAxis numAxis = (NumberAxis) plot.getRangeAxis();NumberFormat numFormater = NumberFormat.getNumberInstance();numFormater.setMinimumFractionDigits(4);numAxis.setNumberFormatOverride(numFormater);//设置X轴（日期轴）DateAxis axis = (DateAxis) plot.getDomainAxis();axis.setDateFormatOverride(new SimpleDateFormat("yyyy-MM-dd"));ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());return chart;//返回生成图片的文件名}/** 设置x轴最大值和最小值* */public void setXValue( XYPlot plot,String timeStr){DateAxis dateAxis = (DateAxis)plot.getDomainAxis();String firstDay = LastMonthUtil.getLastMonthFirstDay(timeStr);String lastDay = LastMonthUtil.getLastMonthLastDay(timeStr);try {dateAxis.setRange(this.changeStingToDate(firstDay),this.changeStingToDate(lastDay));} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();} //}/** 设置x轴名称* */public String getXName(String timeStr ){int year = Integer.parseInt(timeStr.split(" ")[0].split("-")[0]);int month = Integer.parseInt(timeStr.split(" ")[0].split("-")[1]);String monthStr;switch(month){case 1: monthStr = "Jan";break;case 2: monthStr = "Feb";break;case 3: monthStr = "Mar";break;case 4: monthStr = "Apr";break;case 5: monthStr = "May";break;case 6: monthStr = "Jun";break;case 7: monthStr = "Jul";break;case 8: monthStr = "Aug";break;case 9: monthStr = "Sep";break;case 10: monthStr = "Oct";break;case 11: monthStr = "Nov";break;case 12: monthStr = "Dec";break;default :  monthStr = "error";break;}String name = monthStr + " " + year;return name;}/*** 建立生成图形所需的数据集* @return 返回数据集* @throws ParseException */private XYDataset createDateSet() throws ParseException{TimeSeriesCollection dataset = new TimeSeriesCollection();//时间曲线数据集合TimeSeries s1 = new TimeSeries("quxian1", Minute.class);//创建时间数据源，每一个//TimeSeries在图上是一条曲线TimeSeries s2 = new TimeSeries("quxian2", Minute.class);//创建时间数据源，每一个//TimeSeries在图上是一条曲线//s1.add(new Day(day,month,year),value),添加数据点信息String time1 = "2015-02-01 00:00:00";String time2 = "2015-02-09 22:16:27";String time3 = "2015-02-09 22:21:27";String time4 = "2015-02-10 22:26:27";String time5 = "2015-02-10 22:31:27";String time6 = "2015-02-09 22:36:27";String time7 = "2015-02-10 22:41:27";String time8 = "2015-02-09 22:46:27";String time9 = "2015-02-09 22:51:27";String time10 = "2015-02-27 23:16:27";s1.add(new Minute(this.changeStingToDate(time2)),126.51);s1.add(new Minute(this.changeStingToDate(time3)),153.51);s1.add(new Minute(this.changeStingToDate(time4)),158); s1.add(new Minute(this.changeStingToDate(time5)),133.51);s1.add(new Minute(this.changeStingToDate(time6)),123.51);s1.add(new Minute(this.changeStingToDate(time7)),136);s1.add(new Minute(this.changeStingToDate(time8)),173.51);s1.add(new Minute(this.changeStingToDate(time9)),193.51); s1.add(new Minute(this.changeStingToDate(time10)),183.51);s2.add(new Minute(this.changeStingToDate(time2)),226.51);s2.add(new Minute(this.changeStingToDate(time3)),253.51);s2.add(new Minute(this.changeStingToDate(time4)),235); s2.add(new Minute(this.changeStingToDate(time5)),233.51);s2.add(new Minute(this.changeStingToDate(time6)),223.51);s2.add(new Minute(this.changeStingToDate(time7)),256);s2.add(new Minute(this.changeStingToDate(time8)),273.51);s2.add(new Minute(this.changeStingToDate(time9)),293.51); s2.add(new Minute(this.changeStingToDate(time10)),283.51);dataset.addSeries(s1);dataset.addSeries(s2);dataset.setDomainIsPointsInTime(true);return dataset;}public void saveImage(JFreeChart chart,String fileName){String imageName = "d:/chartTest/XYLineChart.png";try {   //年的用600*400;月的用800*400,用PNG生生成的图片比较清楚   ChartUtilities.saveChartAsPNG(new File(imageName), chart, 640, 360);   } catch (IOException exz) {   System.out.print("....Cant’t Create image File");   }  }public static void main(String args[]) throws ParseException{JFreeChartUtil jFreeChartUtil = new JFreeChartUtil();XYDataset dataset = jFreeChartUtil.createDateSet();//建立数据集JFreeChart chart = jFreeChartUtil.getLineXYChart(dataset,"Traffic Report - Up Stream","2015-02-09 22:31:27");//增加子标题String title[] = new String[]{"DC MAX:85kb/s","Partition 1 MAX:1332kb/s AVG:10kb/s","Partition 2 MAX:0kb/s"};jFreeChartUtil.addSubTitle(chart, title);//保存图片jFreeChartUtil.saveImage(chart,"");System.out.println("success");
//
//      jFreeChartUtil.test1();//1 生成dataset//2 初始化chart}/** 增加子标题* */public void addSubTitle(  JFreeChart chart,String title[]){//摄者chart的子标题if(title.length > 0){for(int i = 0 ; i < title.length ; i++){chart.addSubtitle(new TextTitle(title[i]));}}}public Date changeStingToDate(String timeStr) throws ParseException{SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");return  sdf.parse(timeStr);}public void test1() throws ParseException{String time5 = "2015-05-09 22:31:27";
//    Date test =  this.changeStingToDate(time5);
//     System.out.println("test = " + test);
//     System.out.println("date = " + new Date());JFreeChartUtil chart = new JFreeChartUtil();String name = chart.getXName(time5);System.out.println("name = " + name);}
}

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