1. 包依赖
2. XML 配置
<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>
3. 示例
package com.zth;
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;
import javax.servlet.http.HttpSession;
import java.awt.*;
import java.io.IOException;
/**
* @author zth
* @Date 2019-05-25 9:54
*/
public class LineChart01 {
public static String getLineChart(HttpSession session) throws IOException {
// A网站访问量统计
TimeSeries timeSeries1 = new TimeSeries("A网站", Month.class);
timeSeries1.add(new Month(1,2019),200);
timeSeries1.add(new Month(2,2019),250);
timeSeries1.add(new Month(3,2019),320);
timeSeries1.add(new Month(4,2019),480);
timeSeries1.add(new Month(5,2019),305);
timeSeries1.add(new Month(6,2019),400);
timeSeries1.add(new Month(7,2019),510);
timeSeries1.add(new Month(8,2019),650);
timeSeries1.add(new Month(9,2019),340);
timeSeries1.add(new Month(10,2019),550);
timeSeries1.add(new Month(11,2019),700);
timeSeries1.add(new Month(12,2019),750);
// B网站访问量统计
TimeSeries timeSeries2 = new TimeSeries("A网站", Month.class);
timeSeries2.add(new Month(1,2019),85);
timeSeries2.add(new Month(2,2019),120);
timeSeries2.add(new Month(3,2019),220);
timeSeries2.add(new Month(4,2019),320);
timeSeries2.add(new Month(5,2019),450);
timeSeries2.add(new Month(6,2019),580);
timeSeries2.add(new Month(7,2019),790);
timeSeries2.add(new Month(8,2019),1000);
timeSeries2.add(new Month(9,2019),820);
timeSeries2.add(new Month(10,2019),530);
timeSeries2.add(new Month(11,2019),720);
timeSeries2.add(new Month(12,2019),900);
// 定义时间序列集合
TimeSeriesCollection seriesCollection = new TimeSeriesCollection();
seriesCollection.addSeries(timeSeries1);
seriesCollection.addSeries(timeSeries2);
JFreeChart chart = ChartFactory.createTimeSeriesChart(
"网站访问量统计对比图",
"月份",
"访问量",
seriesCollection,
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("宋体", Font.ITALIC, 15)));
//设置子标题
TextTitle subtitle = new TextTitle("2019年度", new Font("黑体", Font.BOLD, 12));
//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("宋体", 1, 12));
plot.setRenderer(xyitem);
chart.addSubtitle(subtitle);
chart.setAntiAlias(true);
String fileName = ServletUtilities.saveChartAsPNG(chart,400,300,null,session);
return fileName;
}
}
Jsp 引用
<img src="DisplayChart?filename=<%=LineChart01.getLineChart(session)%>">
效果：
