vimage.java

用jsp做的一个小例子

package com.today.common;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;

import javax.imageio.ImageIO;

public class VImage {
	public String getVImage(OutputStream os) {
		String str = "";
		BufferedImage bf = new BufferedImage(60, 20, BufferedImage.TYPE_INT_BGR);
		Graphics g = bf.getGraphics();
		g.setFont(new Font("宋体", Font.BOLD, 16));
		g.setColor(Color.WHITE);
		g.fillRect(0, 0, 60, 20);
		g.setColor(Color.BLACK);
		Random r=new Random();
		g.setColor(new Color(200+r.nextInt(50),200+r.nextInt(50),200+r.nextInt(50)));
		for (int i = 0; i < 80; i++) {
			g.drawLine(r.nextInt(60),r.nextInt(20),r.nextInt(60),r.nextInt(20));
			
		}
		for (int i = 0; i < 4; i++) {
			g.setColor(new Color(r.nextInt(150),r.nextInt(150),r.nextInt(150)));
			for (int j = 0; j < 2; j++) {
				g.drawLine(r.nextInt(60),r.nextInt(20),r.nextInt(60),r.nextInt(20));
			}
			int s=r.nextInt(10);
			str+=s;
			g.drawString(String.valueOf(s),12*i+5,15);
			
		}
		try {
			ImageIO.write(bf,"JPEG",os);
			os.flush();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return str;
	}
}