JFreeChart 折線圖

2019-11-10 17:46:44

字體：大中小

來源：轉載

供稿：網友

在我前面的博文講到了JFreeChart報表圖形：JFreeChart 3D餅圖 JFreeChart 柱形圖

1.現在我們來講講JFreeChart-折線圖：

1.所需要的架包：

架包下載地址：架包下載因為是我上傳的免費下載。

下載后解壓，所需的架包在lib文件夾中2.編寫Servlet控制類：[java] view plain copy PRint?public static String genLineChart(Httpsession session)throws Exception{ // A網站的訪問量統計 TimeSeries timeSeries=new TimeSeries(“A網站訪問量統計”, Month.class); // 添加數據如果你是從數據庫中獲取數據，你就寫個循環塞值就行了。 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網站的訪問量統計 //如果有更多的就繼續添加就行了 TimeSeries timeSeries2=new TimeSeries(“B網站訪問量統計”, Month.class); // 添加數據 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); // 定義時間序列的集合 TimeSeriesCollection lineDataset=new TimeSeriesCollection(); lineDataset.addSeries(timeSeries); lineDataset.addSeries(timeSeries2); JFreeChart chart=ChartFactory.createTimeSeriesChart(”訪問量統計時間折線圖”, “月份”, “訪問量”, lineDataset, true, true, true); //設置主標題 chart.setTitle(new TextTitle(“A,B網站訪問量統計對比圖”, new Font(“隸書”, Font.ITALIC, 15))); //設置子標題 TextTitle subtitle = new TextTitle(“2016年度”, new Font(“黑體”, Font.BOLD, 12)); chart.addSubtitle(subtitle); chart.setAntiAlias(true); //設置時間軸的范圍。 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)); //設置曲線是否顯示數據點 XYLineAndShapeRenderer xylinerenderer = (XYLineAndShapeRenderer)plot.getRenderer(); xylinerenderer.setBaseShapesVisible(true); //設置曲線顯示各數據點的值 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); //最后返回組成的折線圖數值 String fileName=ServletUtilities.saveChartaspNG(chart, 700, 500, session); return fileName; }

public static String genLineChart(HttpSession session)throws Exception{        // A網站的訪問量統計        TimeSeries timeSeries=new TimeSeries("A網站訪問量統計", Month.class);        // 添加數據  如果你是從數據庫中獲取數據，你就寫個循環塞值就行了。        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網站的訪問量統計        //如果有更多的就繼續添加就行了        TimeSeries timeSeries2=new TimeSeries("B網站訪問量統計", Month.class);        // 添加數據        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);        // 定義時間序列的集合        TimeSeriesCollection lineDataset=new TimeSeriesCollection();        lineDataset.addSeries(timeSeries);        lineDataset.addSeries(timeSeries2);        JFreeChart chart=ChartFactory.createTimeSeriesChart("訪問量統計時間折線圖", "月份", "訪問量", lineDataset, true, true, true);        //設置主標題        chart.setTitle(new TextTitle("A,B網站訪問量統計對比圖", new Font("隸書", Font.ITALIC, 15)));         //設置子標題        TextTitle subtitle = new TextTitle("2016年度", new Font("黑體", Font.BOLD, 12));        chart.addSubtitle(subtitle);         chart.setAntiAlias(true);         //設置時間軸的范圍。        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));         //設置曲線是否顯示數據點        XYLineAndShapeRenderer xylinerenderer = (XYLineAndShapeRenderer)plot.getRenderer();        xylinerenderer.setBaseShapesVisible(true);         //設置曲線顯示各數據點的值        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);        //最后返回組成的折線圖數值        String fileName=ServletUtilities.saveChartAsPNG(chart, 700, 500, session);        return fileName;    }3.編寫jsp顯示頁面：[java] view plain copy print?<%@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：[java] view plain copy print?<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.最后完成的顯示效果：