生产验证码

Java服务器端

package com.bentengwu.adcutils.util;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;

import javax.imageio.ImageIO;

/**
* ��֤��
* @author dsna
*
*/
public class ValidateCode {
    // ͼƬ�Ŀ�ȡ�
    private int width = 160;
    // ͼƬ�ĸ߶ȡ�
    private int height = 40;
    // ��֤��ַ��
    private int codeCount = 5;
    // ��֤��
    private int lineCount = 150;
    // ��֤��
    private String code = null;
    // ��֤��ͼƬBuffer
    private BufferedImage buffImg=null;

    private char[] codeSequence = {'0','1', '2', '3', '4', '5', '6', '7', '8', '9' };
//    private char[] codeSequence = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
//           'K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
//           'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

    public ValidateCode() {
        this.createCode();
    }

    /**
     *
     * @param width ͼƬ��
     * @param height ͼƬ��
     */
    public ValidateCode(int width,int height) {
        this.width=width;
        this.height=height;
        this.createCode();
    }
    /**
     *
     * @param width ͼƬ��
     * @param height ͼƬ��
     * @param codeCount �ַ��
     * @param lineCount ��
     */
    public ValidateCode(int width,int height,int codeCount,int lineCount) {
        this.width=width;
        this.height=height;
        this.codeCount=codeCount;
        this.lineCount=lineCount;
        this.createCode();
    }

    public void createCode() {
        int x = 0,fontHeight=0,codeY=0;
        int red = 0, green = 0, blue = 0;

        x = width / (codeCount +2);//ÿ��ַ�Ŀ��
        fontHeight = height - 2;//��ĸ߶�
        codeY = height - 4;

        // ͼ��buffer
        buffImg = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
        Graphics2D g = buffImg.createGraphics();
        // ��
        Random random = new Random();
        // ��ͼ��Ϊ��ɫ
        g.setColor(Color.WHITE);
        g.fillRect(0, 0, width, height);
        // ��
        ImgFontByte imgFont=new ImgFontByte();
        Font font =imgFont.getFont(fontHeight);
        g.setFont(font);

        for (int i = 0; i < lineCount; i++) {
            int xs = random.nextInt(width);
            int ys = random.nextInt(height);
            int xe = xs+random.nextInt(width/8);
            int ye = ys+random.nextInt(height/8);
            red = random.nextInt(255);
            green = random.nextInt(255);
            blue = random.nextInt(255);
            g.setColor(new Color(red, green, blue));
            g.drawLine(xs, ys, xe, ye);
        }

        // randomCode��¼��֤��
        StringBuffer randomCode = new StringBuffer();
        // ��codeCount��ַ��֤�롣
        for (int i = 0; i < codeCount; i++) {
            String strRand = String.valueOf(codeSequence[random.nextInt(codeSequence.length)]);
            // ��ɫֵ��ÿ��ַ��ɫֵ��ͬ��
            red = random.nextInt(255);
            green = random.nextInt(255);
            blue = random.nextInt(255);
            g.setColor(new Color(red, green, blue));
            g.drawString(strRand, (i + 1) * x, codeY);
            // ��ĸ��һ��
            randomCode.append(strRand);
        }
        // ��λ��ֵ��֤�뱣�浽Session�С�
        code=randomCode.toString();
    }

    public void write(String path) throws IOException {
        OutputStream sos = new FileOutputStream(path);
            this.write(sos);
    }

    public void write(OutputStream sos) throws IOException {
            ImageIO.write(buffImg, "png", sos);
            sos.close();
    }
    public BufferedImage getBuffImg() {
        return buffImg;
    }

    public String getCode() {
        return code;
    }

    public static void main(String args[]){
       ValidateCode vCode = new ValidateCode(120,40,5,10);
       try {
           OutputStream out =new FileOutputStream(new File("d:/ss"));
           vCode.write(out);
       } catch (Exception e) {
           //
           e.printStackTrace();
       }
       System.out.println(vCode.getCode());
    }

}

public class ValidateCodeController extends WebAbstractController {

   @RequestMapping(method = { RequestMethod.GET, RequestMethod.POST })
   public void vali(HttpSession session, HttpServletResponse response,
           HttpServletRequest request) throws IOException {
       // 设置响应的类型格式为图片格式
       response.setContentType("image/jpeg");
       // 禁止图像缓存。
       response.setHeader("Pragma", "no-cache");
       response.setHeader("Cache-Control", "no-cache");
       response.setDateHeader("Expires", 0);

       ValidateCode vCode = new ValidateCode(100, 40, 4, 10);
       session.setAttribute(Globalconstant.VALIDATE_CODE_NOT_MESSAGE, vCode.getCode());
       vCode.write(response.getOutputStream());
   }
}

html:

js：

/*重置验证码 */
   function changeValidateCode() {
       document.getElementById("validateCode_img").src = "${ctx}/index/public/validateCode/code"
               + Math.random();
       return false;
   }

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