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>

<title>My JSP 'index.jsp' starting page</title>

<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-name>DisplayChart</servlet-name>

<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>DisplayChart</servlet-name>

<url-pattern>/servlet/DisplayChart</url-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

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）相关推荐

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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）

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