一个关于JAVA绘制仿真立体饼图的程序源码,供大家参考

下面程序是一个APPLET,有爱好的朋友可以将其改为BEAN,

/程序名称:饼形图

//程序类型:Java APPLET

//文件类型:模板文件,由Html驱动,数据为模拟数据

//原文件名:CakeChart.java

//程序版本:1.5

//程序设计人:杨勇

//更新日期:2003-3-13

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

import java.math.*;

import java.util.*;

import java.awt.geom.Arc2D;

import java.awt.geom.*;

import java.awt.Polygon;

import java.util.Date;

import java.applet.*;

public class CakeChart extends Applet

{

//初始数据

private double data[]={100.,50,113.,127.,299.234,120.,93.,123.,127.,199.,157.,189.};

private String percent[]=new String[data.length]; //每个数据所占百分比

private int radian[]=new int[data.length]; //每个数据所对应的弧度数

private double max,min;

//初始化每块饼的颜色

private int dia=240;//设置饼图透明度

private Color c1=new Color(0,255,0,dia);

private Color c2=new Color(255,255,0,dia);

private Color c3=new Color(255,0,0,dia);

private Color c4=new Color(255,128,64,dia);

private Color c5=new Color(255,128,255,dia);

private Color c6=new Color(255,0,128,dia);

private Color c7=new Color(233,124,24,dia);

private Color c8=new Color(204,119,115,dia);

private Color c9=new Color(89,159,230,dia);

private Color c10=new Color(148,140,179,dia);

private Color c11=new Color(128,0,64,dia);

private Color c12=new Color(174,197,208,dia);

private Color colors[]={c1,c2,c3,c12,c11,c6,c4,c8,c9,c10,c5,c7};

//统计图的宽度和高度

private int width=600;

private int height=400;

//定义标题起始坐标变量

private int titleStart_x;

private int titleStart_y;

//定义圆心坐标

private int oval_x=60;

private int oval_y=90;

//定义椭圆的长轴和短轴

private int long_axes=280;

private int short_axes=200;

//定义图例区域起点坐标

private int cutlineRect_x=70;

private int cutlineRect_y=450;

//定义图倒区域矩形的宽度和高度

private int cutlineRect_width=100;

private int cutlineRect_heigth=235;

//定义日期变量

private Date date=new Date();

//定义统计图其他显示信息的超始坐标

private int otherInfo_x1;

private int otherInfo_y1;

private int otherInfo_x2;

private int otherInfo_y2;

private int otherInfo_x3;

private int otherInfo_y3;

//定义标题XY轴信息

private String title="服务器流量统计 (饼形统计图) ";

private String otherInfo1="西南师范大学网络教育学院";

private String otherInfo2="www.eduwest.com";

private String otherInfo3="绘图日期：";

//双缓冲设置

private Image offScreenImage =null;

private Graphics offScreenBuffer =null;

public CakeChart()

{

}

public void init()

{

offScreenImage=this.createImage(width,height);

offScreenBuffer=offScreenImage.getGraphics();

NumberBudget();

CoorBudget();

}

public void NumberBudget()

{

//求数据中的最大值和最小值

max=data[0];

min=data[0];

for(int mm=0;mm<data.length;mm++)

{

if(data[mm]>max)

max=data[mm];

if(data[mm]<min)

min=data[mm];

}

//对数据进行求和运算

float allData_sum=0;

for(int s=0;s<data.length;s++)

{

allData_sum+=data[s];

}

//计算每个数据占总数的百分比

for(int p=0;p<data.length;p++)

{

percent[p]=String.valueOf(Math.round(data[p]/allData_sum*100))+"%";

}

//计算每个数据所对应的弧度数

for(int r=0;r<data.length;r++)

{

radian[r]=Math.round((float)data[r]/allData_sum*360);

}

}

public void CoorBudget()

{

//预算标题信息的起始坐标

titleStart_x=22;

titleStart_y=(width/2)-(title.length()*15/2);

//初始化统计图其他显示信息的起始坐标(位置固定)

otherInfo_x1=390;

otherInfo_y1=450;

otherInfo_x2=400;

otherInfo_y2=480;

otherInfo_x3=390;

otherInfo_y3=5;

}

public void update(Graphics g)

{

paint(g);

}

public void paint(Graphics g)

{

PaintBackground(offScreenBuffer);

PaintChart(offScreenBuffer);

g.drawImage(offScreenImage,0,0,this);

}

public void PaintBackground(Graphics g)

{

//渐变背景初始颜色

Color BackStartColor=Color.white;

Color BackLastColor=new Color(162,189,230);

Color titleColor=Color.black;

Color otherInfoColor=new Color(41,78,118);

//标题背景颜色

Color titleBackColor=new Color(147,179,225);

//统计图中心区域颜色

Color cutlineColor=new Color(0,128,255,50);

//图例数据颜色

Color cutDataColor=Color.white;

Font titleFont=new Font("黑体",Font.BOLD,18);

Font otherFont=new Font("宋体",Font.PLAIN,12);

String year="";

String month="";

String day="";

Graphics2D g2=(Graphics2D)g;

RenderingHints hints = new RenderingHints(null);

hints.put(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);

g2.setRenderingHints(hints);

GradientPaint gradient=new GradientPaint(0,0,BackStartColor,0,400,BackLastColor,false);

g2.setPaint(gradient);

Rectangle2D rect=new Rectangle2D.Double(0,0,width,height);

g2.fill(rect);

//绘制标题背景

g2.setColor(titleBackColor);

g2.fill3DRect(0,0,width,30,true);

//绘制图例区域背景

g2.setColor(cutlineColor);

g2.fillRect(cutlineRect_y,cutlineRect_x,cutlineRect_width,cutlineRect_heigth);

g2.setColor(Color.white);

g2.drawRect(cutlineRect_y,cutlineRect_x,cutlineRect_width,cutlineRect_heigth);

//绘制统计图标题

g2.setFont(titleFont);

g2.setColor(titleColor);

g2.drawString(title,titleStart_y,titleStart_x);

//显示统计图其它信息

g2.setFont(otherFont);

g2.setColor(otherInfoColor);

g2.drawString(otherInfo1,otherInfo_y1,otherInfo_x1);

g2.drawString(otherInfo2,otherInfo_y2,otherInfo_x2);

g2.drawString(otherInfo3,otherInfo_y3,otherInfo_x3);

//显示绘制日期

year=Integer.toString(1900+date.getYear());

month=Integer.toString(date.getMonth()+1);

day=Integer.toString(date.getDate());

g2.drawString(year+"年"+month+"月"+day+"日",otherInfo_y3+60,otherInfo_x3);

//显示数据百分比

int colorRectWH=15;

int space=5; //图例中小色块之间的间隔距离

int addData=cutlineRect_x;

for(int i=0;i<data.length;i++)

{

g2.setColor(colors[i]);

g2.fill3DRect(cutlineRect_y,addData,colorRectWH,colorRectWH,true);

if(data[i]==max data[i]==min)

g2.setColor(Color.red);

else

g2.setColor(cutDataColor);

g2.drawString(String.valueOf(data[i])+" ("+percent[i]+")",cutlineRect_y+20,addData+colorRectWH-space);

addData+=colorRectWH+space;

}

}

public void PaintChart(Graphics g)

{

int start=0;

int rVal=192;

int gVal=192;

int bVal=192;

int frameCount=60;

Graphics2D g2=(Graphics2D)g;

RenderingHints hints = new RenderingHints(null);

hints.put(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);

g2.setRenderingHints(hints);

for(int t=20;t>=0;t--)

{

rVal=t*255/frameCount;

gVal=t*255/frameCount;

bVal=t*255/frameCount;

g2.setColor(new Color(rVal,gVal,bVal,50));

g2.drawOval(oval_x,oval_y+t,long_axes,short_axes);

}

for(int a=0;a<data.length;a++)

{

Arc2D arc = new Arc2D.Float(Arc2D.PIE);

g2.setColor(colors[a]);

arc.setFrame(oval_x,oval_y,long_axes,short_axes);

arc.setAngleStart(start);

arc.setAngleExtent(radian[a]);

g2.fill(arc);

if(data[a]==max data[a]==min)

g2.setColor(Color.white);

else

g2.setColor(new Color(223,223,223,150));

g2.draw(arc);

start+=radian[a];

}

}

HTML程序:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML>

<HEAD>

<TITLE> New Document </TITLE>

<META NAME="Generator" CONTENT="EditPlus">

<META NAME="Author" CONTENT="">

<META NAME="KeyWords" CONTENT="">

<META NAME="Description" CONTENT="">

</HEAD>

<BODY>

<APPLET CODE="CakeChart.class" WIDTH="600" HEIGHT="400">

</APPLET>

</BODY>

</HTML>

==============================

说明:

必须将HTML和CLASS放在一个目录里,必须安装JRE(1.4及以上版本).

==============================

国外也有类似API包,有免费的也有收费的,

比如:http://www.visualmining.com(商业的,不过可以学习其系统架构,很不错)

http://www.jfree.org/(免费的,不过API文档要收费)

--------------------------------

希望对大家有所帮助,也希望大家指出程序中的不足,谢谢!

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