JAVA Graphics2D画笔初体验 博客分类： JDK//Demo javaGraphics

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class Test {
    
    public static void main(String []args){
        Test.pressFive("d:/generImage.png", 1, 0, 0, 0, 0);
    }
    
    /** 
     * 生成五边形用的函数 
     * @param dstImg，输出图片文件名称 
     * @param v1，有效值为0-4 
     * @param v2，有效值为0-4 
     * @param v3，有效值为0-4 
     * @param v4，有效值为0-4 
     * @param v5，有效值为0-4 
     */  
    public final static void pressFive(String dstImg,int v1,int v2,int v3,int v4,int v5) {  
       try {  
           int picWidth=600,picHeight=600;  
           BufferedImage bufferedImage = new BufferedImage(picWidth, picHeight, BufferedImage.TYPE_INT_RGB);  
           Graphics2D g = bufferedImage.createGraphics();  
           g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 1.0f));  
             
           //填充背景  
           g.setColor(new Color(255,255,255));  
           g.fillRect(0, 0, picWidth, picHeight);  
           int min = 90,deta=20,mark=50;  
           int [][]p1 = new int[5][2];           
           for(int i=0; i<5; i++){  
               p1[i][0]=picWidth/2;  
               p1[i][1]=picHeight/2-min-deta*i;  
           }  
             
           int [][]px = new int[5][5];  //一维：五个角中的那个角，二维：从里到外0-4  
           int [][]py = new int[5][5];    
           double angle=0.0;  
           //计算五个五边形的顶点。  
           for(int i=0; i<5; i++){  
               angle = 72*Math.PI*i/180;  
               for(int j=0; j<5; j++){  
                   px[i][j]=(int) Math.round(picWidth/2+(min+deta*j)*Math.sin(angle));  
                   py[i][j]=(int) Math.round(picHeight/2-(min+deta*j)*Math.cos(angle));  
               }  
           }  
           //绘制五个五边形  
           g.setColor(new Color(128,128,128));  
           for(int i=0; i<5; i++){  
               g.drawPolygon(new int[]{px[0][i],px[1][i],px[2][i],px[3][i],px[4][i]},  
                   new int[]{py[0][i],py[1][i],py[2][i],py[3][i],py[4][i]}, 5);  
           }  
             
           //绘制根据指定的顶点序号，绘制五边形  
           g.setColor(new Color(0,204,255));  
           g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f));  
           g.fillPolygon(new int[]{px[0][v1],px[1][v2],px[2][v3],px[3][v4],px[4][v5]},   
                   new int[]{py[0][v1],py[1][v2],py[2][v3],py[3][v4],py[4][v5]}, 5);  
     
           //输出文字  
           g.setColor(new Color(16,16,16));  
           int fontsize=12;  
           g.setFont(new Font("黑体",Font.PLAIN,fontsize));  
           String [] text = {"金","木","水","火","土"};  
            g.drawString(text[0]+"/"+(v1)*mark, px[0][4],py[0][4]-fontsize);  
            g.drawString(text[1]+"/"+(v2)*mark, px[1][4],py[1][4]);  
            g.drawString(text[2]+"/"+(v3)*mark, px[2][4],py[2][4]+fontsize);  
            g.drawString(text[3]+"/"+(v4)*mark, px[3][4]-fontsize*7,py[3][4]);  
            g.drawString(text[4]+"/"+(v5)*mark, px[4][4]-fontsize*7,py[4][4]);  
             
           g.dispose();  
           //保存图片  
           ImageIO.write(bufferedImage, "JPG", new File(dstImg));  
       } catch (IOException e) {  
           e.printStackTrace();  
       }  
    }  

}