用jfreechart在JSP页面显示点状分布图+分割线（转载：http://blog.csdn.net/ami121/article/details/2450945）
JSP页面
<%@ page language="java" pageEncoding="gbk"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting pagetitle> <jsp:useBean id="barchart01" scope="session" class="com.ami.chart.SeriesXY" />head><body><% String fileName = barchart01.getImg(request.getSession(), out); String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + fileName;%><br/><img src="<%= graphURL %>" border="0" usemap="#<%=fileName %>" /><br />body>html>
WEB.XML
<servlet> <servlet-name>DisplayChartservlet-name> <servlet-class>org.jfree.chart.servlet.DisplayChartservlet-class> servlet><servlet-mapping><servlet-name>DisplayChartservlet-name><url-pattern>/servlet/DisplayCharturl-pattern>servlet-mapping>
Java实现代码
package com.ami.chart;import java.awt.BasicStroke;import java.awt.Color;import java.awt.Font;import java.io.PrintWriter;import javax.servlet.http.HttpSession;import javax.servlet.jsp.JspWriter;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.NumberAxis;import org.jfree.chart.axis.NumberTickUnit;import org.jfree.chart.axis.ValueAxis;import org.jfree.chart.entity.StandardEntityCollection;import org.jfree.chart.plot.PlotOrientation;import org.jfree.chart.plot.ValueMarker;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.data.xy.XYSeries;import org.jfree.data.xy.XYSeriesCollection;import org.jfree.ui.RectangleAnchor;import org.jfree.ui.TextAnchor;
public class SeriesXY {
public String getImg(HttpSession session ,JspWriter out){ String filename=null; double []xydata1_0={12.8d,12.3d,12.9d,12.2d,13.3d,12.0d,12.8d,13.3d,12.9d,13.9d,12.3d,12.0d,12.8d,12.3d,11.9d,13.2d,12.3d,14.0d,12.8d,12.3d,12.9d,13.2d,13.3d,14.0d,12.8d,13.3d,11.9d,13.9d,12.3d,12.0d,19.8d,12.3d,14.9d,18.2d,12.3d,14.0d,12.8d,12.3d,12.9d,18.2d,13.3d,14.0d,12.8d,14.3d,12.9d,13.9d,12.3d,12.0d,13.8d,12.3d,11.9d,13.2d,12.3d,14.0d,12.8d,12.3d,12.9d,18.2d,16.3d,18.0d,12.8d,12.3d,19.9d,13.9d,12.3d,12.0d,12.8d,12.3d,12.9d,13.2d,12.3d,14.0d,12.8d,12.3d,12.9d,12.2d,13.3d,12.0d,12.8d,13.3d,12.9d,13.9d}; double []xydata1_1={196.0d,223.0d,230.5d,241.0d,195.8d,200.3d,200.0d,230.0d,243.5d,261.0d,259.8d,245.3d,236.0d,260.0d,225.5d,230.0d,190.8d,205.3d,196.0d,223.0d,230.5d,241.0d,195.8d,200.3d,200.0d,230.0d,243.5d,261.0d,259.8d,245.3d,236.0d,260.0d,225.5d,230.0d,190.8d,205.3d,196.0d,223.0d,230.5d,241.0d,195.8d,200.3d,200.0d,230.0d,243.5d,261.0d,259.8d,245.3d,236.0d,260.0d,225.5d,230.0d,190.8d,205.3d,196.0d,223.0d,230.5d,241.0d,195.8d,200.3d,200.0d,230.0d,243.5d,261.0d,259.8d,245.3d,236.0d,260.0d,225.5d,230.0d,190.8d,205.3d,196.0d,223.0d,230.5d,241.0d,195.8d,200.3d,200.0d,230.0d,243.5d,261.0d}; XYSeriesCollection xyCollection=new XYSeriesCollection(); XYSeries xyseries1=new XYSeries("ACompany"); for(int i=0;i<82;i++){ xyseries1.add(xydata1_0[i], xydata1_1[i]);
} XYSeries xyseries2=new XYSeries("BCompany"); xyCollection.addSeries(xyseries1); //分布点状图 JFreeChart chart=ChartFactory.createScatterPlot("电压电流图", "电流","电压", xyCollection, PlotOrientation.VERTICAL, true, false, false); XYPlot plot=(XYPlot) chart.getPlot(); ValueMarker vmarker=new ValueMarker(230d);//设置分割线 vmarker.setLabel("平均电压230V"); vmarker.setLabelPaint(Color.black); vmarker.setPaint(Color.red); vmarker.setLabelFont(new Font("隶书",Font.PLAIN,10)); vmarker.setLabelAnchor(RectangleAnchor.BOTTOM_RIGHT); vmarker.setLabelTextAnchor(TextAnchor.TOP_RIGHT); plot.addRangeMarker(vmarker); ValueMarker xMarker=new ValueMarker(12.50d); xMarker.setLabel("平均电流12.50A"); xMarker.setPaint(Color.orange); xMarker.setLabelFont(new Font("隶书",Font.BOLD,10)); xMarker.setLabelAnchor(RectangleAnchor.BOTTOM_RIGHT); xMarker.setLabelTextAnchor(TextAnchor.BOTTOM_RIGHT); plot.addDomainMarker(xMarker); plot.setRangeGridlinePaint(Color.black);//设置X轴的颜色 ValueAxis yAxis=plot.getRangeAxis(); yAxis.setAutoRange(true); yAxis.setAutoRangeMinimumSize(50.0d); NumberAxis yNumber=(NumberAxis) plot.getRangeAxis(); yNumber.setTickUnit(new NumberTickUnit(50d)); yAxis.setLowerBound(50.0d); plot.setRangeAxis(yAxis); ValueAxis xAxis=plot.getDomainAxis(); xAxis.setAutoRange(false); NumberAxis numberaxis=(NumberAxis)plot.getDomainAxis(); numberaxis.setTickUnit(new NumberTickUnit(0.1D));//设置X轴跨度每次增加1 xAxis.setUpperBound(14.2d); xAxis.setLowerBound(11.8d); XYItemRenderer itRender=plot.getRenderer(); try { PrintWriter pw=new PrintWriter(out); StandardEntityCollection sec = new StandardEntityCollection(); ChartRenderingInfo info = new ChartRenderingInfo(sec); filename=ServletUtilities.saveChartAsJPEG(chart,650, 400,null, session); ChartUtilities.writeImageMap(pw, filename,info, true); } catch (Exception e) { e.printStackTrace(); } return filename; }
}
效果图
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