JFreeChart 折线图

来源：互联网发布：数据存储单位从小到大编辑：程序博客网时间：2024/06/05 19:50

在我前面的博文讲到了JFreeChart报表图形：JFreeChart 3D饼图 JFreeChart 柱形图

1.现在我们来讲讲JFreeChart-折线图：

1.所需要的架包：
架包下载地址：架包下载因为是我上传的免费下载。
下载后解压，所需的架包在lib文件夹中
2.编写Servlet控制类：
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public static String genLineChart(HttpSession session)throws Exception{
        // A网站的访问量统计
        TimeSeries timeSeries=new TimeSeries(“A网站访问量统计”, Month.class);
        // 添加数据  如果你是从数据库中获取数据，你就写个循环塞值就行了。
        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);

        // B网站的访问量统计
        //如果有更多的就继续添加就行了
        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(“隶书”, Font.ITALIC, 15)));
        //设置子标题
        TextTitle subtitle = new TextTitle(“2016年度”, new Font(“黑体”, 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);

        //最后返回组成的折线图数值
        String fileName=ServletUtilities.saveChartAsPNG(chart, 700, 500, session);

        return fileName;
    }
public static String genLineChart(HttpSession session)throws Exception{        // A网站的访问量统计        TimeSeries timeSeries=new TimeSeries("A网站访问量统计", Month.class);        // 添加数据  如果你是从数据库中获取数据，你就写个循环塞值就行了。        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);        // B网站的访问量统计        //如果有更多的就继续添加就行了        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("隶书", Font.ITALIC, 15)));         //设置子标题        TextTitle subtitle = new TextTitle("2016年度", new Font("黑体", 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);        //最后返回组成的折线图数值        String fileName=ServletUtilities.saveChartAsPNG(chart, 700, 500, session);        return fileName;    }
3.编写JSP显示页面：
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<%@page import=“com.java1234.chart.line.LineChart2”%>
<%@ 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>
<%@page import="com.java1234.chart.line.LineChart2"%><%@ 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>
4.配置web.xml核心文件：
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<servlet>
        <servlet-name>DisplayChart</servlet-name>
        <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>DisplayChart</servlet-name>
        <url-pattern>/DisplayChart</url-pattern>
    </servlet-mapping>
<servlet>        <servlet-name>DisplayChart</servlet-name>        <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>    </servlet>    <servlet-mapping>        <servlet-name>DisplayChart</servlet-name>        <url-pattern>/DisplayChart</url-pattern>    </servlet-mapping>
5.最后完成的显示效果：

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