1.TimeSeries，TimeSeriesCollection 引入
package com.xp.chart.line;
import java.awt.Font;
import java.io.IOException;
import javax.servlet.http.HttpSession;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickUnit;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardXYItemLabelGenerator;
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.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.TextAnchor;
/**
* 折线图实例
* @author xiongpan001
*/
public class LineChart1 {
public static String getLineChart(HttpSession session) throws Exception {
//创建一个时间序列并且设置报表标题为2016年网站访问量统计
TimeSeries timeSeries=new TimeSeries("2016年武汉气温变化情况统计图", Month.class);
//往折线图序列添加数据
timeSeries.add(new Month(1,2016),23);
timeSeries.add(new Month(2,2016),28);
timeSeries.add(new Month(3,2016),29);
timeSeries.add(new Month(4,2016),30);
timeSeries.add(new Month(5,2016),29);
timeSeries.add(new Month(6,2016),30);
timeSeries.add(new Month(7,2016),33);
timeSeries.add(new Month(8,2016),34);
timeSeries.add(new Month(9,2016),23);
timeSeries.add(new Month(10,2016),12);
timeSeries.add(new Month(11,2016),17);
timeSeries.add(new Month(12,2016),23);
// 定义时间序列的集合
TimeSeriesCollection lineDataset= new TimeSeriesCollection();
lineDataset.addSeries(timeSeries);
JFreeChart chart = ChartFactory.createTimeSeriesChart("气温变化趋势折线图",
"月份", "气温", lineDataset, true, true, true);
// 设置主标题
chart.setTitle(new TextTitle("气温变化趋势折线图",
new Font("楷书", Font.ITALIC, 16)));
// 设置子标题
TextTitle subtitle = new TextTitle("2016年度", new Font("微软雅黑", Font.BOLD,
12));
chart.addSubtitle(subtitle);
chart.setAntiAlias(true);
// 设置时间轴的范围。
XYPlot plot = (XYPlot) chart.getPlot();
DateAxis dateaxis = (DateAxis) plot.getDomainAxis();
dateaxis.setDateFormatOverride(new java.text.SimpleDateFormat("M月"));
dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.MONTH, 1));
// 设置曲线是否显示数据点
XYLineAndShapeRenderer xylinerenderer = (XYLineAndShapeRenderer) plot
.getRenderer();
xylinerenderer.setBaseShapesVisible(true);
// 设置曲线显示各数据点的值
XYItemRenderer xyitem = plot.getRenderer();
xyitem.setBaseItemLabelsVisible(true);
xyitem.setBasePositiveItemLabelPosition(new ItemLabelPosition(
ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_CENTER));
xyitem.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator());
xyitem.setBaseItemLabelFont(new Font("Dialog", 1, 12));
plot.setRenderer(xyitem);
String fileName = ServletUtilities.saveChartAsPNG(chart, 700, 500,
session);
return fileName;
}
}
2.创建折线图页面，代码如下
<%@page import="com.xp.chart.line.LineChart1"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String fileName=LineChart1.getLineChart(session);
System.out.println(fileName);
%>
<img src="DisplayChart?filename=<%=fileName %>" width="700" height="500" border="0"/>
</body>
</html>
3.显示折线图如下
2.利用JFreeChart创建多重折线图报表
package com.xp.chart.line;
import java.awt.Font;
import javax.servlet.http.HttpSession;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickUnit;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardXYItemLabelGenerator;
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.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.TextAnchor;
public class LineChart2 {
public static String genLineChart(HttpSession session)throws Exception{
// 访问量统计
TimeSeries timeSeries=new TimeSeries("A网站访问量统计", Month.class);
// 添加数据
timeSeries.add(new Month(1,2013), 100);
timeSeries.add(new Month(2,2013), 200);
timeSeries.add(new Month(3,2013), 300);
timeSeries.add(new Month(4,2013), 400);
timeSeries.add(new Month(5,2013), 560);
timeSeries.add(new Month(6,2013), 600);
timeSeries.add(new Month(7,2013), 750);
timeSeries.add(new Month(8,2013), 890);
timeSeries.add(new Month(9,2013), 120);
timeSeries.add(new Month(10,2013), 400);
timeSeries.add(new Month(11,2013), 1200);
timeSeries.add(new Month(12,2013), 1600);
// 访问量统计
TimeSeries timeSeries2=new TimeSeries("B网站访问量统计", Month.class);
// 添加数据
timeSeries2.add(new Month(1,2013), 50);
timeSeries2.add(new Month(2,2013), 100);
timeSeries2.add(new Month(3,2013), 150);
timeSeries2.add(new Month(4,2013), 200);
timeSeries2.add(new Month(5,2013), 220);
timeSeries2.add(new Month(6,2013), 300);
timeSeries2.add(new Month(7,2013), 340);
timeSeries2.add(new Month(8,2013), 400);
timeSeries2.add(new Month(9,2013), 450);
timeSeries2.add(new Month(10,2013), 500);
timeSeries2.add(new Month(11,2013), 70);
timeSeries2.add(new Month(12,2013), 800);
// 定义时间序列的集合
TimeSeriesCollection lineDataset=new TimeSeriesCollection();
lineDataset.addSeries(timeSeries);
lineDataset.addSeries(timeSeries2);
JFreeChart chart=ChartFactory.createTimeSeriesChart("访问量统计时间折线图", "月份", "访问量", lineDataset, true, true, true);
//设置主标题
chart.setTitle(new TextTitle("A,B网站访问量统计对比图", new Font("楷书", Font.BOLD, 15)));
//设置子标题
TextTitle subtitle = new TextTitle("2013年度", new Font("微软雅黑", Font.BOLD, 12));
chart.addSubtitle(subtitle);
chart.setAntiAlias(true);
//设置时间轴的范围。
XYPlot plot = (XYPlot) chart.getPlot();
DateAxis dateaxis = (DateAxis)plot.getDomainAxis();
dateaxis.setDateFormatOverride(new java.text.SimpleDateFormat("M月"));
dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.MONTH,1));
//设置曲线是否显示数据点
XYLineAndShapeRenderer xylinerenderer = (XYLineAndShapeRenderer)plot.getRenderer();
xylinerenderer.setBaseShapesVisible(true);
//设置曲线显示各数据点的值
XYItemRenderer xyitem = plot.getRenderer();
xyitem.setBaseItemLabelsVisible(true);
xyitem.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_CENTER));
xyitem.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator());
xyitem.setBaseItemLabelFont(new Font("Dialog", 1, 12));
plot.setRenderer(xyitem);
String fileName=ServletUtilities.saveChartAsPNG(chart, 700, 500, session);
return fileName;
}
}
创建页面代码如下
<%@page import="com.xp.chart.line.LineChart2"%>
<%@page import="com.xp.chart.line.LineChart1"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
String fileName=LineChart2.genLineChart(session);
System.out.println(fileName);
%>
<img src="DisplayChart?filename=<%=fileName %>" width="700" height="500" border="0"/>
</body>
</html>
3.显示的双重折线图如图所示
