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。
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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。。。-_-!
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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
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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,
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