java代码生成扇形图 java绘制扇形图

java生成直方图和饼图

可以啊,用Java2D绘图库很容易的,都是些线、矩形、扇形、字符串而已,以前项目中这么作过,如果不作通用类库的话结构也可以不考虑那么些,直接作个专用方法,传数据对象进去,返回图像BufferedImage之类就行了。只是些四则运算。

创新互联是一家集网站建设,雁江企业网站建设,雁江品牌网站建设,网站定制,雁江网站建设报价,网络营销,网络优化,雁江网站推广为一体的创新建站企业,帮助传统企业提升企业形象加强企业竞争力。可充分满足这一群体相比中小企业更为丰富、高端、多元的互联网需求。同时我们时刻保持专业、时尚、前沿,时刻以成就客户成长自我,坚持不断学习、思考、沉淀、净化自己,让我们为更多的企业打造出实用型网站。

或者找其它类库。

JAVA实现简单的画图板

楼主写一个html,很容易把下面代码嵌入到applet,可以google一下实现,

还有copy自己不知道算不算复制。。。-_-!

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

楼主给你一个我的,直接保存成pb.java编译运行,就是你要的画图功能 ,可以参考一下

____________________________________________________________________

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import java.awt.geom.*;

import java.io.*;

class Point implements Serializable

{

int x,y;

Color col;

int tool;

int boarder;

Point(int x, int y, Color col, int tool, int boarder)

{

this.x = x;

this.y = y;

this.col = col;

this.tool = tool;

this.boarder = boarder;

}

}

class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener

{

int x = -1, y = -1;

int con = 1;//画笔大小

int Econ = 5;//橡皮大小

int toolFlag = 0;//toolFlag:工具标记

//toolFlag工具对应表:

//(0--画笔);(1--橡皮);(2--清除);

//(3--直线);(4--圆);(5--矩形);

Color c = new Color(0,0,0); //画笔颜色

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//画笔粗细

Point cutflag = new Point(-1, -1, c, 6, con);//截断标志

Vector paintInfo = null;//点信息向量组

int n = 1;

FileInputStream picIn = null;

FileOutputStream picOut = null;

ObjectInputStream VIn = null;

ObjectOutputStream VOut = null;

// *工具面板--画笔,直线,圆,矩形,多边形,橡皮,清除*/

Panel toolPanel;

Button eraser, drLine,drCircle,drRect;

Button clear ,pen;

Choice ColChoice,SizeChoice,EraserChoice;

Button colchooser;

Label 颜色,大小B,大小E;

//保存功能

Button openPic,savePic;

FileDialog openPicture,savePicture;

paintboard(String s)

{

super(s);

addMouseMotionListener(this);

addMouseListener(this);

paintInfo = new Vector();

/*各工具按钮及选择项*/

//颜色选择

ColChoice = new Choice();

ColChoice.add("black");

ColChoice.add("red");

ColChoice.add("blue");

ColChoice.add("green");

ColChoice.addItemListener(this);

//画笔大小选择

SizeChoice = new Choice();

SizeChoice.add("1");

SizeChoice.add("3");

SizeChoice.add("5");

SizeChoice.add("7");

SizeChoice.add("9");

SizeChoice.addItemListener(this);

//橡皮大小选择

EraserChoice = new Choice();

EraserChoice.add("5");

EraserChoice.add("9");

EraserChoice.add("13");

EraserChoice.add("17");

EraserChoice.addItemListener(this);

////////////////////////////////////////////////////

toolPanel = new Panel();

clear = new Button("清除");

eraser = new Button("橡皮");

pen = new Button("画笔");

drLine = new Button("画直线");

drCircle = new Button("画圆形");

drRect = new Button("画矩形");

openPic = new Button("打开图画");

savePic = new Button("保存图画");

colchooser = new Button("显示调色板");

//各组件事件监听

clear.addActionListener(this);

eraser.addActionListener(this);

pen.addActionListener(this);

drLine.addActionListener(this);

drCircle.addActionListener(this);

drRect.addActionListener(this);

openPic.addActionListener(this);

savePic.addActionListener(this);

colchooser.addActionListener(this);

颜色 = new Label("画笔颜色",Label.CENTER);

大小B = new Label("画笔大小",Label.CENTER);

大小E = new Label("橡皮大小",Label.CENTER);

//面板添加组件

toolPanel.add(openPic);

toolPanel.add(savePic);

toolPanel.add(pen);

toolPanel.add(drLine);

toolPanel.add(drCircle);

toolPanel.add(drRect);

toolPanel.add(颜色); toolPanel.add(ColChoice);

toolPanel.add(大小B); toolPanel.add(SizeChoice);

toolPanel.add(colchooser);

toolPanel.add(eraser);

toolPanel.add(大小E); toolPanel.add(EraserChoice);

toolPanel.add(clear);

//工具面板到APPLET面板

add(toolPanel,BorderLayout.NORTH);

setBounds(60,60,900,600); setVisible(true);

validate();

//dialog for save and load

openPicture = new FileDialog(this,"打开图画",FileDialog.LOAD);

openPicture.setVisible(false);

savePicture = new FileDialog(this,"保存图画",FileDialog.SAVE);

savePicture.setVisible(false);

openPicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ openPicture.setVisible(false); }

});

savePicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ savePicture.setVisible(false); }

});

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ System.exit(0);}

});

}

public void paint(Graphics g)

{

Graphics2D g2d = (Graphics2D)g;

Point p1,p2;

n = paintInfo.size();

if(toolFlag==2)

g.clearRect(0,0,getSize().width,getSize().height);//清除

for(int i=0; in ;i++){

p1 = (Point)paintInfo.elementAt(i);

p2 = (Point)paintInfo.elementAt(i+1);

size = new BasicStroke(p1.boarder,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

g2d.setColor(p1.col);

g2d.setStroke(size);

if(p1.tool==p2.tool)

{

switch(p1.tool)

{

case 0://画笔

Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line1);

break;

case 1://橡皮

g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder);

break;

case 3://画直线

Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line2);

break;

case 4://画圆

Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(ellipse);

break;

case 5://画矩形

Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(rect);

break;

case 6://截断,跳过

i=i+1;

break;

default :

}//end switch

}//end if

}//end for

}

public void itemStateChanged(ItemEvent e)

{

if(e.getSource()==ColChoice)//预选颜色

{

String name = ColChoice.getSelectedItem();

if(name=="black")

{c = new Color(0,0,0); }

else if(name=="red")

{c = new Color(255,0,0);}

else if(name=="green")

{c = new Color(0,255,0);}

else if(name=="blue")

{c = new Color(0,0,255);}

}

else if(e.getSource()==SizeChoice)//画笔大小

{

String selected = SizeChoice.getSelectedItem();

if(selected=="1")

{

con = 1;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="3")

{

con = 3;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="5")

{con = 5;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="7")

{con = 7;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="9")

{con = 9;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

}

else if(e.getSource()==EraserChoice)//橡皮大小

{

String Esize = EraserChoice.getSelectedItem();

if(Esize=="5")

{ Econ = 5*2; }

else if(Esize=="9")

{ Econ = 9*2; }

else if(Esize=="13")

{ Econ = 13*2; }

else if(Esize=="17")

{ Econ = 17*3; }

}

}

public void mouseDragged(MouseEvent e)

{

Point p1 ;

switch(toolFlag){

case 0://画笔

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p1);

repaint();

break;

case 1://橡皮

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, null, toolFlag, Econ);

paintInfo.addElement(p1);

repaint();

break;

default :

}

}

public void mouseMoved(MouseEvent e) {}

public void update(Graphics g)

{

paint(g);

}

public void mousePressed(MouseEvent e)

{

Point p2;

switch(toolFlag){

case 3://直线

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 4: //圆

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

default :

}

}

public void mouseReleased(MouseEvent e)

{

Point p3;

switch(toolFlag){

case 0://画笔

paintInfo.addElement(cutflag);

break;

case 1: //eraser

paintInfo.addElement(cutflag);

break;

case 3://直线

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 4: //圆

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

default:

}

}

public void mouseEntered(MouseEvent e){}

public void mouseExited(MouseEvent e){}

public void mouseClicked(MouseEvent e){}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==pen)//画笔

{toolFlag = 0;}

if(e.getSource()==eraser)//橡皮

{toolFlag = 1;}

if(e.getSource()==clear)//清除

{

toolFlag = 2;

paintInfo.removeAllElements();

repaint();

}

if(e.getSource()==drLine)//画线

{toolFlag = 3;}

if(e.getSource()==drCircle)//画圆

{toolFlag = 4;}

if(e.getSource()==drRect)//画矩形

{toolFlag = 5;}

if(e.getSource()==colchooser)//调色板

{

Color newColor = JColorChooser.showDialog(this,"调色板",c);

c = newColor;

}

if(e.getSource()==openPic)//打开图画

{

openPicture.setVisible(true);

if(openPicture.getFile()!=null)

{

int tempflag;

tempflag = toolFlag;

toolFlag = 2 ;

repaint();

try{

paintInfo.removeAllElements();

File filein = new File(openPicture.getDirectory(),openPicture.getFile());

picIn = new FileInputStream(filein);

VIn = new ObjectInputStream(picIn);

paintInfo = (Vector)VIn.readObject();

VIn.close();

repaint();

toolFlag = tempflag;

}

catch(ClassNotFoundException IOe2)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read object");

}

catch(IOException IOe)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read file");

}

}

}

if(e.getSource()==savePic)//保存图画

{

savePicture.setVisible(true);

try{

File fileout = new File(savePicture.getDirectory(),savePicture.getFile());

picOut = new FileOutputStream(fileout);

VOut = new ObjectOutputStream(picOut);

VOut.writeObject(paintInfo);

VOut.close();

}

catch(IOException IOe)

{

System.out.println("can not write object");

}

}

}

}//end paintboard

public class pb

{

public static void main(String args[])

{ new paintboard("画图程序"); }

}

用java编写一个颜色为红色,粗线型的笑脸和哭脸,需要继承JFrame类,用java中的绘制图形做

JFreeChart------------它是一种组件技术,专用于在java中实现图形报表

----------饼图,柱状图,折线图

JFreeChart它是一种独立图表技术,它与struts2本身并无关系,只不过,它可以与struts2配合使用

饼图的步骤:

1、创建一个web工程

2、导入struts2框架(core,struts2-jfreeChart)

3、向工程导入(jfreechart.jar,jcommon.jar)

4、创建BaseAction继承于ActionSupport,并且,在类中,声明一个属性 JFreeChart chart;并且生成set,get方法

5、编写ChartAction类,继承于BaseAction

6、在ChartAction类中,编写 showPie()用于显示饼图

7、在struts.xml配置当前action

8、在index.jsp配置,通过img src="chart!showPie.action"进入到指定方法

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

9、编写ChartDao类,模拟从数据库查询数据

//得到饼图需要的数据集

public DefaultPieDataset getPieDataset(){

DefaultPieDataset dp = new DefaultPieDataset();

dp.setValue("联想",321);

dp.setValue("华硕",189);

dp.setValue("戴尔",98);

dp.setValue("IBM",213);

dp.setValue("Apple",287);

dp.setValue("惠普",120);

dp.setValue("SONY",87);

return dp;

}

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

10、在ChartAction中的showPie方法,生成饼图

public String showPie(){

//得以要显示的数据集,根据数据,生成饼图

DefaultPieDataset dp = dao.getPieDataset();

//chart = ChartFactory.createPieChart("标题",要显示在饼图中的数据集,是否显示颜色说明,"是否显示工具提示","是否显示网络地址 ");

chart = ChartFactory.createPieChart("一季度各电脑品牌销售汇总",dp,true,false,false);

return "success";

}

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

11、在struts.xml文件,进行相关配置

package name="struts2" extends="struts-default"

result-types

result-type name="chart" class="org.apache.struts2.dispatcher.ChartResult"/

/result-types

action name="chart" class="org.java.web.ChartAction"

result name="success" type="chart"

param name="width"800/param

param name="height"600/param

/result

/action

/package

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

12、解决乱码

标题区的乱码

Font f1 = new Font("隶书",Font.BOLD,40);

TextTitle tt = new TextTitle("一季度各电脑品牌销售汇总",f1);

chart.setTitle(tt);//绑定标题

颜色提示区乱码

Font f2 = new Font("隶书",Font.BOLD,20);

LegendTitle lt = chart.getLegend();

lt.setItemFont(f2);//设置该区域的字体

解决饼图中的乱码

PiePlot pp = (PiePlot) chart.getPlot();//得到饼图区域

pp.setLabelFont(f2);//设置饼图区域中的字体

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

13、设置饼图中要显示的数据格式

//该对象,用于指定饼图要显示的数据格式 //0:key //1:value 2:百分比

StandardPieSectionLabelGenerator sc = new StandardPieSectionLabelGenerator("{0},{1}台,{2}");

//把显示的格式,绑定饼图中

pp.setLabelGenerator(sc);

需要完整版请联系我

Java绘制扇形图

import java.awt.Graphics;

public class test {

public static void main(String[] args) {

Graphics g = null;

OKString os = new OKString();

os.paint(g);

}

}

null是对Graphics的声明对象(方式)

希望可以帮到你,要是不理解可以再聊。。。

如何用java整合echarts生成饼图

1.分为线上echarts、线下echarts(推荐使用线下echarts)。

2.如果是使用线下echarts,第一步开始下载官网的插件包,先进入主页看见右上角的下载,根据自己需要的图表下载对应的插件包。

powerdesigner怎么用java代码生成类图

使用PowerDesigner软件逆向生成java类图的方法、步骤:1、打开PowerDesiger软件,点击文件-建立新模型,新建Obect-OrientedModel2、点击语言-ReverseEngineerJava,弹出反向生成类图设置窗口;3、在反向生成类图设置窗口中,选择ReverseEngineer,可以选择JavaFiles或JavaDirectories等,在这里我选择JavaDirectories;4、然后点击Add按钮添加目录,在这里我选择一个java源文件目录;5、点击确定,PowerDesigner会显示生成进度窗口,完成以后在PowerDesigner工作空间下会显示类图目录结构;6、到此便将选中的Java目录下的Java类文件生成了静态类结构,


网站名称:java代码生成扇形图 java绘制扇形图
网站网址:http://pwwzsj.com/article/hjdhdc.html