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 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
>
<
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
