randomcheckpics.java

web页面验证码

package com.scitel.checkDemo.bo;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.Random;

public class RandomCheckPics {
	private Properties p=new Properties();
	private BufferedImage imgs;
	private Graphics g;
	private int height,width,length;
	private String a;
	private Random random=new Random();
	private String s=new String();
	//private String[] fontTypes = {"\u5b8b\u4f53","\u65b0\u5b8b\u4f53","\u9ed1\u4f53","\u6977\u4f53","\u96b6\u4e66"}; 
	public RandomCheckPics(String realPath){
		try {
			InputStream in = new BufferedInputStream(new FileInputStream(realPath+"/WEB-INF/char.properties"));
			p.load(in);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		height=Integer.parseInt(p.getProperty("pic.height"));
		width=Integer.parseInt(p.getProperty("pic.width"));
		length=Integer.parseInt(p.getProperty("char.lehgth"));
		imgs=new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
		g=imgs.getGraphics();
		a=p.getProperty("char.char");
		g.setColor(getRandColor(random,200,250));
		g.fillRect(0,0,width,height);
		g.setColor(getRandColor(random,160,200)); 
		g.setFont(new Font("Times New Roman",Font.PLAIN,Integer.parseInt(p.getProperty("noise.size")))); 
		String noise=p.getProperty("noise.char");
		int sssss=Integer.parseInt(p.getProperty("noise.number"));
		for (int i=0;i<sssss;i++) 
		{ 
			g.drawString(noise,random.nextInt(width),random.nextInt(height));
		} 
		for (int i=0;i<length;i++) 
		{ 
			int start = random.nextInt(a.length()); 
			String rand=a.substring(start,start+1); 
			s+=rand; 
			g.setColor(getRandColor(random,10,150)); 
			g.setFont(new Font("\u5b8b\u4f53",Font.PLAIN,Integer.parseInt(p.getProperty("char.size"))));
			g.drawString(rand,(width/length)*i,height-random.nextInt(height/2)); 
		}
		g.dispose();
	}
	private Color getRandColor(Random random,int fc,int bc) 
	{ 
		if(fc>255) fc=255; 
		if(bc>255) bc=255; 
		int r=fc+random.nextInt(bc-fc); 
		int g=fc+random.nextInt(bc-fc); 
		int b=fc+random.nextInt(bc-fc); 
		return new Color(r,g,b); 
	} 
	public BufferedImage getImage(){
		return imgs;
	}
	public String getString(){
		return s;
	}
	
}