產生彩色驗證碼

驗證碼 本文將教你如何一步一步地使用javabean實現了產生彩色驗證碼的全過程，並提供原始碼。


 檔案名稱：Image.java
=====================================
/*
 * Created on 2004-8-4
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package myclass.test;

import java.awt.*;
import java.awt.image.*;
import java.util.*;

/**
 * @author
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class Image {
 
  public String sRand="";
 
  public Color getRandColor(int fc,int bc){//給定範圍獲得隨機顏色
   Random random = new Random();
   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 creatImage(){

 // 在記憶體中建立圖象
    int width=60, height=20;
    BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

    // 擷取圖形上下文
    Graphics g = image.getGraphics();

    //產生隨機類
    Random random = new Random();

    // 設定背景色
    g.setColor(getRandColor(200,250));
    g.fillRect(0, 0, width, height);

    //設定字型
    g.setFont(new Font("Times New Roman",Font.PLAIN,18));