验 证 码

/**
  * 生成验证码

  * @author：陈勇 QQ：369232566
  */
 public String toValidateImage() {
  String num = RndImage.random();
  OutputStream out = null;
  try {
   out = response.getOutputStream();
   RndImage.Imageout(num, out, 60, 20);
   Smcy.settingSession(request, "validate", num);
  } catch (IOException e) {
   // TODO Auto-generated catch block
  } finally {
   if (null != out) {
    // try {
    // out.close();
    // out.flush();
    // } catch (IOException e) {
    // TODO Auto-generated catch block
    // }
   }
  }
  return null;
 }

 

 

 

 

 

 

 

 

 

00000000000000000000000000000000000000000000000

 

 

 

package com.cn.zy.utils.common;

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

import javax.imageio.ImageIO;

/**
 * XDoclet definition: 生成验证码类 
 * 

  * @author：陈勇 QQ：369232566
 *
 */
public class RndImage {
 // ������λ��ķ���
 public static String random() {
  java.util.Random rnd = new java.util.Random();
  int i = 10000 + rnd.nextInt(10000);
  String str = "" + i;
  return str.substring(1, str.length());
 }

 public static void Imageout(String num, OutputStream out, int width,
   int height) {
  BufferedImage romimage = null;
  java.util.Random rnd = new java.util.Random();
  try {
   romimage = new BufferedImage(width, height,
     BufferedImage.TYPE_INT_RGB);
   Graphics2D g = (Graphics2D) romimage.getGraphics();
   g.setColor(Color.lightGray);
    g.setBackground(Color.white);
   g.fillRect(0, 0, width, height);
   Font mFont = new Font("Tahoma", Font.ITALIC, height * 3 / 3);
   g.setFont(mFont);
   String[] str1 = new String[4];
   for (int i = 0; i < str1.length; i++) {
    str1[i] = "" + num.charAt(i);
    g.setColor(getRandomColor());
    g.drawString(str1[i], 13 * i + 1, height * 4 / 5);
   }

   for (int i = 0; i < 7; i++) {
    int x = rnd.nextInt(width - 1);
    int y = rnd.nextInt(height - 1);
    int xl = rnd.nextInt(6) + 1;
    int yl = rnd.nextInt(12) + 1;
    g.drawLine(x, y, x + xl * 10, y + yl * 10);
   }
   for (int i = 0; i < 1; i++) {
    int x = rnd.nextInt(width - 1);
    int y = rnd.nextInt(height - 1);
    int xl = rnd.nextInt(12) + 1;
    int yl = rnd.nextInt(6) + 1;
    g.drawLine(x, y, x - xl * 10, y - yl * 10);
   }
   g.dispose();

   ImageIO.write(romimage, "JPEG", out);

  } catch (IOException ex) {
   // System.out.println("������֤�����ʧ�ܣ�" + ex.toString());

  }
 }

 private static Color getRandomColor() {
  java.util.Random rnd = new java.util.Random();
  return new Color(rnd.nextInt(105), rnd.nextInt(105), rnd.nextInt(205));
 }

}