import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.HttpServlet;import org.jfree.data.*;
import org.jfree.chart.*;
/**
* 演示通过servlet直接输出图表
*/
public class ChartDemoServlet extends HttpServlet { public void service(ServletRequest req, ServletResponse res)
throws ServletException, IOException
{
res.setContentType("image/jpeg");
DefaultPieDataset data = getDataSet();
JFreeChart chart = ChartFactory.createPie3DChart("水果产量图",
data,
true,
false,
false
);
ChartUtilities.writeChartAsJPEG(res.getOutputStream(),
100,chart,400,300,null);
}
/**
* 获取一个演示用的简单数据集对象
* @return
*/
private static DefaultPieDataset getDataSet() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("苹果",100);
dataset.setValue("梨子",200);
dataset.setValue("葡萄",300);
dataset.setValue("香蕉",400);
dataset.setValue("荔枝",500);
return dataset;
}
}
import javax.servlet.*;
import javax.servlet.http.HttpServlet;import org.jfree.data.*;
import org.jfree.chart.*;
/**
* 演示通过servlet直接输出图表
*/
public class ChartDemoServlet extends HttpServlet { public void service(ServletRequest req, ServletResponse res)
throws ServletException, IOException
{
res.setContentType("image/jpeg");
DefaultPieDataset data = getDataSet();
JFreeChart chart = ChartFactory.createPie3DChart("水果产量图",
data,
true,
false,
false
);
ChartUtilities.writeChartAsJPEG(res.getOutputStream(),
100,chart,400,300,null);
}
/**
* 获取一个演示用的简单数据集对象
* @return
*/
private static DefaultPieDataset getDataSet() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("苹果",100);
dataset.setValue("梨子",200);
dataset.setValue("葡萄",300);
dataset.setValue("香蕉",400);
dataset.setValue("荔枝",500);
return dataset;
}
}
<html xmlns:v="urn:schemas-microsoft-com:vml"><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title></title>
<style>v\:*{behavior:url(#default#vml)}/*声明v为vml变量*/</style>
</head><body onload="InitVRML();"><script>
//模拟数据
var RecordSetArray=new Array();
//模拟记录条数
var iRecordCount=20;
for(iIndex=0;iIndex<iRecordCount;iIndex++)
{
var UnitArray=new Array();
UnitArray[0]=iIndex;
UnitArray[1]=Math.round(Math.random()*1000);
RecordSetArray[iIndex]=UnitArray;
}
//模拟数据Y轴最大值[范围]
var iRecordMaxX=20;//模拟数据X轴最大值[范围]
var iRecordMaxY=1000;//模拟数据Y轴最大值[范围]
//坐标系统
var iScreenWidth=400;//真实宽度PX
var iScreenHeight=400;//真实高度PX
var iCoordSizeX=4000;//分隔宽度
var iCoordSizeY=4000;//分隔高度
var iCoordSizeStep=200;//坐标轴与边距
var iRectSize=100;//柱状图柱体宽度
var vGroup=null;//VRML区域
function Line(iRecordCount)
{
VRMLID.innerHTML="";
InitVRML();
CoordSize();
CoordSizeLine();
var iFromX=iCoordSizeStep;
var iFromY=0;
for(iIndex=0;iIndex<iRecordCount;iIndex++)
{
var vLine=document.createElement("v:line");
vLine.style.left="0";
vLine.style.top="0";
vLine.from="'"+iFromX+","+iFromY+"'";
iFromX=iCoordSizeStep+Math.round(RecordSetArray[iIndex][0]*(iCoordSizeX-iCoordSizeStep)/iRecordMaxX);
iFromY=Math.round(RecordSetArray[iIndex][1]*(iCoordSizeY-iCoordSizeStep)/iRecordMaxY);
vLine.to="'"+iFromX+","+iFromY+"'";
vLine.strokecolor="#000000";
vLine.strokeweight="1";
vLine.title="模拟数据第"+RecordSetArray[iIndex][0]+"条";
//var vStroke=document.createElement("v:stroke");
//vStroke.EndArrow="Classic";
//vStroke.StartArrow="Oval";
//vLine.appendChild(vStroke);
vGroup.appendChild(vLine);
}
}
function Circle(iRecordCount)
{
VRMLID.innerHTML="";
InitVRML();
var varMax=Math.pow(2,16)*360;
var vTotal=1;
var vStartAngle=0;
var vEndAngle=0;
var vPreAngle=0;
for(kIndex=0;kIndex<iRecordCount;kIndex++)
{
vTotal+=RecordSetArray[kIndex][1];
}
for(iIndex=0;iIndex<iRecordCount;iIndex++)
{
var vShape=document.createElement("v:shape");
vStartAngle+=vPreAngle;
vPreAngle=RecordSetArray[iIndex][1]/vTotal;
vEndAngle=RecordSetArray[iIndex][1]/vTotal; vShape.style.width=iCoordSizeX-2*iCoordSizeStep;
vShape.style.height=iCoordSizeY-2*iCoordSizeStep;
vShape.style.top=iCoordSizeStep;
vShape.style.left=iCoordSizeStep;
vShape.strokecolor="black";
vShape.fillcolor=RandColor(); vShape.path="M 2000 2000 AE 2000 2000 2000 2000 "+parseInt(varMax*vStartAngle)+" "+parseInt(varMax*vEndAngle)+" xe";
vShape.title="第"+RecordSetArray[iIndex][0]+"块";
vShape._scale=parseInt(360*(vStartAngle+vEndAngle/2));
vGroup.appendChild(vShape);
}
}
function Bar(iRecordCount)
{
VRMLID.innerHTML="";
InitVRML();
CoordSize();
CoordSizeLine();
var iStep=Math.round(iCoordSizeX/iRecordCount);
for(iIndex=1;iIndex<iRecordCount;iIndex++)
{
var iRnd=Math.round(Math.random()*(iCoordSizeY-iCoordSizeStep));
var vRect=document.createElement("v:rect");
vRect.style.left=iStep*iIndex;
vRect.style.top=(iCoordSizeY-iCoordSizeStep)-Math.round(RecordSetArray[iIndex][1]*(iCoordSizeY-iCoordSizeStep)/iRecordMaxY);
vRect.style.width=iRectSize;
vRect.style.height=Math.round(RecordSetArray[iIndex][1]*(iCoordSizeY-iCoordSizeStep)/iRecordMaxY);
vRect.fillColor="#EEEEEE";
vRect.title="模拟数据第"+RecordSetArray[iIndex][0]+"条的Y轴图示";
vGroup.appendChild(vRect);
}
}
function DrawLinesX(iMaxX,Object)
{
var iStep=Math.round(iCoordSizeX/iMaxX);
for(var iIndex=1;iIndex<=iMaxX;iIndex++)
{
var vLine=document.createElement("v:line");
vLine.from=iStep*iIndex+","+(iCoordSizeY-iCoordSizeStep);
vLine.to=iStep*iIndex+","+(iCoordSizeY-Math.round(iCoordSizeStep/2));
var vStroke=document.createElement("v:stroke");
vStroke.endArrow="Diamond";
vStroke.dashStyle="dot";
vLine.appendChild(vStroke);
Object.appendChild(vLine);
}
}
function DrawLinesY(iMaxY,Object)
{
var iStep=Math.round(iCoordSizeY/iMaxY);
for(var iIndex=0;iIndex<iMaxY;iIndex++)
{
var vLine=document.createElement("v:line");
vLine.from=iCoordSizeStep+","+iStep*iIndex;
vLine.to=Math.round(iCoordSizeStep/2)+","+iStep*iIndex;
var vStroke=document.createElement("v:stroke");
vStroke.endArrow="Diamond";
vStroke.dashStyle="dot";
vLine.appendChild(vStroke);
Object.appendChild(vLine);
}
}
function InitVRML()
{
VRMLID.innerHTML="";
vGroup=document.createElement("v:group");
vGroup.style.width=iScreenWidth+"px";
vGroup.style.height=iScreenHeight+"px";
vGroup.coordsize=iCoordSizeX+","+iCoordSizeY;
var vRect=document.createElement("v:rect");
vRect.style.width=iCoordSizeX+"px";
vRect.style.height=iCoordSizeY+"px";
vRect.fillColor="#FFFFFF";
vRect.strokeColor="#000000";
var vShadow=document.createElement("v:shadow");
vShadow.on="true";
vShadow.type="single";
vShadow.color="silver";
vShadow.offset="5pt,5pt";
vRect.appendChild(vShadow);
vGroup.appendChild(vRect); VRMLID.appendChild(vGroup);
}
function CoordSize()
{
var vLineX=document.createElement("v:line");
vLineX.from=iCoordSizeStep+","+iCoordSizeStep;
vLineX.to=iCoordSizeStep+","+(iCoordSizeY-iCoordSizeStep);
var vStrokeX=document.createElement("v:stroke");
vStrokeX.startArrow="classic";
vStrokeX.endArrow="oval";
vStrokeX.dashStyle="single";
vLineX.appendChild(vStrokeX);
vGroup.appendChild(vLineX); var vLineY=document.createElement("v:line");
vLineY.from=iCoordSizeStep+","+(iCoordSizeY-iCoordSizeStep);
vLineY.to=(iCoordSizeX-iCoordSizeStep)+","+(iCoordSizeY-iCoordSizeStep);
var vStrokeY=document.createElement("v:stroke");
vStrokeY.startArrow="oval";
vStrokeY.endArrow="classic";
vStrokeY.dashStyle="single";
vLineY.appendChild(vStrokeY);
vGroup.appendChild(vLineY);
}
function CoordSizeLine()
{
DrawLinesX(RecordSetArray.length,vGroup);
DrawLinesY(RecordSetArray.length,vGroup);
}
function RandColor()
{
return "rgb("+parseInt(Math.random()*255)+","+parseInt(Math.random()*255)+","+parseInt(Math.random()*255)+")";
}
function Zoom(iValue)
{
var varX=4000;
var varY=4000;
vGroup.coordsize=parseInt(varX/iValue)+","+parseInt(varY/iValue);
}
</script>
<center>
<input type="button" value="初始设置" onclick="InitVRML();">
<input type="button" value="柱状图" onclick="Bar(RecordSetArray.length);">
<input type="button" value="饼图" onclick="Circle(RecordSetArray.length);">
<input type="button" value="折线图" onclick="Line(RecordSetArray.length)">
<select onchange="Zoom(this.value)">
<option value="0.2" selected>20%</option>
<option value="0.25">25%</option>
<option value="0.4">40%</option>
<option value="0.5">50%</option>
<option value="0.75">75%</option>
<option value="0.8">80%</option>
<option value="1">原始大小</option>
<option value="1.25">125%</option>
<option value="1.5">150%</option>
<option value="2">200%</option>
<option value="3">300%</option>
<option value="4">400%</option>
</select>
<br>
<br>
<div id=VRMLID></div>
</center>
</body></html>