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struts开发实践-柱形图、饼状图实例
本案主要功能是完成柱形图、饼状图的绘制，并将柱形图、饼状图生成jpg图形并显示。
1。调用的主要函数说明:请参考曲线图部分的说明
2。曲线图绘制文件
/program CurveFrame begin*******/
package test;
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.swing.JFrame;
import java.lang.Math;
/**
- 绘图：柱形图；饼形图
*/
public class StatRectFrame
extends JFrame {
private int[] result;
private String[] title;
private int statStyle;
private Color[] color = {
Color.blue, new Color(255, 92, 0), new Color(255, 0, 30),
new Color(0, 255, 30), new Color(255, 0, 240), Color.cyan};
/**入口参数：结果集，标题集，统计类型：柱状图 or 饼状图 */
public StatRectFrame(int[] result, String[] title, int statStyle) {
this.result = result;
this.title = title;
this.statStyle = statStyle;
}
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
Dimension dim = this.getSize();
if (statStyle == 1) {//饼状图
g2.setColor(Color.white);
g2.fillRect(0, 0, dim.width, dim.height);
int total = result[result.length - 1];
int begTangle = 0;
int endTangle = 0;
g2.setColor(Color.black);
int pointx=dim.width/2;//圆心x
int pointy=dim.height/2;//圆心y
int r=150;//半径
long[] pointsx=new long[result.length-1];
long[] pointsy=new long[result.length-1];
pointsx[0]=pointx+r;
pointsy[0]=pointy;
for (int i = 1; i < result.length - 1; i++) {
if (i >= 6) {
g2.setColor(color[i % 6]);
}
else {
g2.setColor(color[i]);
}
if (result[i] > 0) {
int percent=Math.round((result[i]*100f)/total);
endTangle = Math.round(percent*360f/100f);
title[i]=title[i]+"("+percent+"%)";
g2.fillArc( pointx-r,pointy-r, 2r, 2r,
begTangle, endTangle);
//新中心点
pointsx[i]=Math.round(Math.cos(Math.toRadians(begTangle+endTangle*0.5))*r+pointx);
pointsy[i]=Math.round(pointy-Math.sin(Math.toRadians(begTangle+endTangle*0.5))*r);
//延长点
long pointsxEx=Math.round(Math.cos(Math.toRadians(begTangle+endTangle0.5))(r+50)+pointx);
long pointsyEx=Math.round(pointy-Math.sin(Math.toRadians(begTangle+endTangle0.5))(r+50));
g2.setColor(Color.black);
g2.draw(new Line2D.Double(pointsx[i], pointsy[i], pointsxEx, pointsyEx));
//画文本框
g2.setColor(new Color(251,249,206));
if(((int)pointsxEx)
1<pointx){ (i="" (int="" (int)="" (j="" *="" +="" -="" 0,="" 1)="" 10,="" 110,="" 120="" 120));="" 120,="" 1;="" 2),="" 2);="" 2,="" 20="" 20);="" 30)="" 30,="" <="Math.round(title[i].length()" and="" axis="" background="" basicstroke(2.0f));="" begtangle="begTangle" by="" color="" dim.height="" dim.height);="" dim.width,="" draw="" else="" else{="" endtangle;="" fill="" font="g2.getFont().deriveFont(12.0f);" font.layoutglyphvector()="" for="" g2.draw(new="" g2.drawstring(""="" g2.drawstring(title[i],(int)pointsxex,(int)pointsyex+5);="" g2.drawstring(title[i],(int)pointsxex-110,(int)pointsyex+5);="" g2.drawstring(title[i].substring(="" g2.fillrect(="" g2.fillrect(0,="" g2.setcolor(color.black);="" g2.setcolor(color.white);="" g2.setfont(font);="" g2.setpaint(color.black);="" g2.setstroke(new="" height="" i="" i++)="" if="" in="" int="" j="" j++)="" line2d.double(10,="" make="" one="" one;="" pointsxex,="" pointsxex-110,="" pointsyex="" print="" result.length="" result[0];="" result[i]="" result[i],="" sure="" the="" title="" to="" x="" y="" {="" }="" 柱状图="" 画柱形图="">= 6) {
2
3g2.setColor(color[i % 6]);
4
5}
6
7else {
8
9g2.setColor(color[i]);
10
11}
12
13g2.fillRect(20 + (i - 1) * 30, dim.height - 120 - height * result[i],
14
1520, height * result[i]);
16
17}
18
19}
20
21}
22
23}/*****************program end************************/
24
253。生成jpg图形并显示：与曲线图中介绍的部分类似，不再赘述。</pointx){>