图形校验码 

  1. 	public void verifyCode() throws IOException{
  2. 			
  3. 			HttpServletRequest request = ServletActionContext.getRequest();
  4. 			HttpServletResponse response = ServletActionContext.getResponse();
  5. 			
  6. 	        ValidatorCode codeUtil = ValidatorCodeUtil.getCode();
  7. 	        System.out.println("code="+codeUtil.getCode());
  8. 	                                                          
  9. 	        request.getSession().setAttribute("code", codeUtil.getCode());
  10. 	        // 禁止图像缓存。
  11. 	        response.setHeader("Pragma", "no-cache");
  12. 	        response.setHeader("Cache-Control", "no-cache");
  13. 	        response.setDateHeader("Expires", 0);
  14. 	        response.setContentType("image/jpeg");
  15. 	                                                  
  16. 	        ServletOutputStream sos = null;
  17. 	        try {
  18. 	            // 将图像输出到Servlet输出流中。
  19. 	            sos = response.getOutputStream();
  20. 	            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(sos);
  21. 	            encoder.encode(codeUtil.getImage()); 
  22. 	            sos.flush();
  23. 	            sos.close();
  24. 	        } catch (Exception e) {
  25. 	        } finally {
  26. 	            if (null != sos) {
  27. 	                try {
  28. 	                    sos.close();
  29. 	                } catch (IOException e) {
  30. 	                    e.printStackTrace();
  31. 	                }
  32. 	            }
  33. 	        }
  34. 	    }
  1. package com.w658.util;
  3. import java.awt.Color;
  4. import java.awt.Font;
  5. import java.awt.Graphics2D;
  6. import java.awt.image.BufferedImage;
  7. import java.util.Random;
  9. public class ValidatorCodeUtil
  10. {
  11.   public static ValidatorCode getCode()
  12.   {
  13.     int width = 80;
  15.     int height = 30;
  16.     BufferedImage buffImg = new BufferedImage(width, height, 1);
  17.     Graphics2D g = buffImg.createGraphics();
  19.     // 创建一个随机数生成器类  
  20.     Random random = new Random();
  22.     // 将图像填充为白色  
  23.     g.setColor(Color.WHITE);
  24.     g.fillRect(0, 0, width, height);
  26.     // 创建字体，字体的大小
  27.     Font font = new Font("微软雅黑", 2, 28);
  28.     // 设置字体。  
  29.     g.setFont(font);
  31.     // 画边框。  
  32.     g.setColor(Color.LIGHT_GRAY);
  33.     g.drawRect(0, 0, width - 1, height - 1);
  34.     
  35.     // 随机产生10条干扰线，使图象中的认证码不易被其它程序探测到。  
  36.     //g.setColor(Color.lightGray);  
  37.     g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
  38.     for (int i = 0; i < 10; i++) {  
  39.         int x = random.nextInt(width);  
  40.         int y = random.nextInt(height);  
  41.         int xl = random.nextInt(12);  
  42.         int yl = random.nextInt(12);  
  43.         g.drawLine(x, y, x + xl, y + yl);  
  44.     }  
  46.     StringBuffer randomCode = new StringBuffer();
  48.     int length = 4;
  50.     String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  52.     int size = base.length();
  54.     // 随机产生codeCount数字的验证码。  
  55.     for (int i = 0; i < length; i++)
  56.     {
  57.       int start = random.nextInt(size);
  58.       String strRand = base.substring(start, start + 1);
  60.       // 用随机产生的颜色将验证码绘制到图像中。  
  61.       g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
  62.       g.drawString(strRand, 15 * i + 6, 24);
  64.       // 将产生的四个随机数组合在一起。  
  65.       randomCode.append(strRand);
  66.     }
  68.     //清空缓存  
  69.     g.dispose();
  70.     
  71.     ValidatorCode code = new ValidatorCode();
  72.     code.image = buffImg;
  73.     code.code = randomCode.toString();
  74.     return code;
  75.   }
  77.   static Color getRandColor(int fc, int bc)
  78.   {
  79.     Random random = new Random();
  80.     if (fc > 255)
  81.       fc = 255;
  82.     if (bc > 255)
  83.       bc = 255;
  84.     int r = fc + random.nextInt(bc - fc);
  85.     int g = fc + random.nextInt(bc - fc);
  86.     int b = fc + random.nextInt(bc - fc);
  87.     return new Color(r, g, b);
  88.   }
  90.   public static class ValidatorCode
  91.   {
  92.     private BufferedImage image;
  93.     private String code;
  95.     public BufferedImage getImage()
  96.     {
  97.       return this.image;
  98.     }
  100.     public String getCode()
  101.     {
  102.       return this.code;
  103.     }
  104.   }
  105. }
  1. package com.w658.util;
  3. import java.awt.Color;
  4. import java.awt.Font;
  5. import java.awt.Graphics2D;
  6. import java.awt.image.BufferedImage;
  7. import java.util.Random;
  9. public class ValidatorCodeUtil
  10. {
  11.   public static ValidatorCode getCode()
  12.   {
  13.     int width = 80;
  15.     int height = 30;
  16.     BufferedImage buffImg = new BufferedImage(width, height, 1);
  17.     Graphics2D g = buffImg.createGraphics();
  19.     // 创建一个随机数生成器类  
  20.     Random random = new Random();
  22.     // 将图像填充为白色  
  23.     g.setColor(Color.WHITE);
  24.     g.fillRect(0, 0, width, height);
  26.     // 创建字体，字体的大小
  27.     Font font = new Font("微软雅黑", 2, 28);
  28.     // 设置字体。  
  29.     g.setFont(font);
  31.     // 画边框。  
  32.     g.setColor(Color.LIGHT_GRAY);
  33.     g.drawRect(0, 0, width - 1, height - 1);
  34.     
  35.     // 随机产生10条干扰线，使图象中的认证码不易被其它程序探测到。  
  36.     //g.setColor(Color.lightGray);  
  37.     g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
  38.     for (int i = 0; i < 10; i++) {  
  39.         int x = random.nextInt(width);  
  40.         int y = random.nextInt(height);  
  41.         int xl = random.nextInt(12);  
  42.         int yl = random.nextInt(12);  
  43.         g.drawLine(x, y, x + xl, y + yl);  
  44.     }  
  46.     StringBuffer randomCode = new StringBuffer();
  48.     int length = 4;
  50.     String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  52.     int size = base.length();
  54.     // 随机产生codeCount数字的验证码。  
  55.     for (int i = 0; i < length; i++)
  56.     {
  57.       int start = random.nextInt(size);
  58.       String strRand = base.substring(start, start + 1);
  60.       // 用随机产生的颜色将验证码绘制到图像中。  
  61.       g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
  62.       g.drawString(strRand, 15 * i + 6, 24);
  64.       // 将产生的四个随机数组合在一起。  
  65.       randomCode.append(strRand);
  66.     }
  68.     //清空缓存  
  69.     g.dispose();
  70.     
  71.     ValidatorCode code = new ValidatorCode();
  72.     code.image = buffImg;
  73.     code.code = randomCode.toString();
  74.     return code;
  75.   }
  77.   static Color getRandColor(int fc, int bc)
  78.   {
  79.     Random random = new Random();
  80.     if (fc > 255)
  81.       fc = 255;
  82.     if (bc > 255)
  83.       bc = 255;
  84.     int r = fc + random.nextInt(bc - fc);
  85.     int g = fc + random.nextInt(bc - fc);
  86.     int b = fc + random.nextInt(bc - fc);
  87.     return new Color(r, g, b);
  88.   }
  90.   public static class ValidatorCode
  91.   {
  92.     private BufferedImage image;
  93.     private String code;
  95.     public BufferedImage getImage()
  96.     {
  97.       return this.image;
  98.     }
  100.     public String getCode()
  101.     {
  102.       return this.code;
  103.     }
  104.   }
  105. }





posted @ 2015-05-26 16:26  一口毒苹果  阅读(246)  评论(0)    收藏  举报