Java代碼

1. public class ImageData implements Serializable {   
2.   
3.     private static final long serialVersionUID = -8161565799237268271L;   
4.     private BufferedImage image;   
5.     Integer width = 60;   
6.     Integer height = 20;   
7.     Color bankgroud = new Color(0xFFFFFF);   
8.     Color drawColor = new Color(0x000000);   
9.    Font textFont = new Font("Comic Sans ms", Font.PLAIN, 18);   
10.    String str = "0,a,2,x,e,5,j,7,l,9,1,b,c,d,4,f,g,h,i,6,k,8,m,n,o,p,q,r,s,t,u,v,w,3,y,z";     
11.     Random random = new Random();   
12.     public void paint(OutputStream out, Object data) throws IOException {   
13.         if (data instanceof ImageData) {   
14.             // create the image   
15.             image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);   
16.             Graphics graphics = image.getGraphics();   
17.             graphics.setColor(bankgroud);   
18.             graphics.fillRect(0, 0, width, height);    
19.             graphics.setColor(drawColor);   
20.             graphics.drawRect(0, 0, width - 1, height - 1);   
21.             graphics.setFont(textFont);   
22.             //繪制干擾線   
23.             for (int i = 0; i < 160; i++) {   
24.                 int x = random.nextInt(width);   
25.                 int y = random.nextInt(height);   
26.                 int xl = random.nextInt(12);   
27.                 int yl = random.nextInt(12);   
28.                 graphics.setColor(getRandColor(100,250));   
29.                 graphics.drawLine(x, y, x + xl, y + yl);   
30.             }   
31.                        //繪制驗證碼   
32.             graphics.setColor(drawColor);   
33.             String code="" ;   
34.             String[] array = str.split(",");   
35.             for (int i = 0; i < 4; i++) {                           
36.                 String rand = array[random.nextInt(36)];   
37.                 code += rand;      
38.                 graphics.drawString(rand, 13 * i + 6, 16);   
39.             }      
40.                   FacesUtil.getSession().setAttribute("code", code);   
41.             graphics.dispose();   
42.         }   
43.         ImageIO.write(image, "JPEG", out);   
44.     }      
45.   
46.     private Color getRandColor(int fc, int bc) {   
47.         Random random = new Random();   
48.         if (fc > 255)   
49.             fc = 255;   
50.         if (bc > 255)   
51.             bc = 255;   
52.         int r = fc + random.nextInt(bc - fc);   
53.         int g = fc + random.nextInt(bc - fc);   
54.         int b = fc + random.nextInt(bc - fc);   
55.         return new Color(r, g, b);   
56.     }   
57.   
58. }  

public class ImageData implements Serializable {
private static final long serialVersionUID = -8161565799237268271L;
private BufferedImage image;
Integer width = 60;
Integer height = 20;
Color bankgroud = new Color(0xFFFFFF);
Color drawColor = new Color(0x000000);
Font textFont = new Font("Comic Sans ms", Font.PLAIN, 18);
String str = "0,a,2,x,e,5,j,7,l,9,1,b,c,d,4,f,g,h,i,6,k,8,m,n,o,p,q,r,s,t,u,v,w,3,y,z";
Random random = new Random();
public void paint(OutputStream out, Object data) throws IOException {
if (data instanceof ImageData) {
// create the image
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics graphics = image.getGraphics();
graphics.setColor(bankgroud);
graphics.fillRect(0, 0, width, height);
graphics.setColor(drawColor);
graphics.drawRect(0, 0, width - 1, height - 1);
graphics.setFont(textFont);
//繪制干擾線
for (int i = 0; i < 160; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
graphics.setColor(getRandColor(100,250));
graphics.drawLine(x, y, x + xl, y + yl);
}
//繪制驗證碼
graphics.setColor(drawColor);
String code="" ;
String[] array = str.split(",");
for (int i = 0; i < 4; i++) {
String rand = array[random.nextInt(36)];
code += rand;
graphics.drawString(rand, 13 * i + 6, 16);
}
FacesUtil.getSession().setAttribute("code", code);
graphics.dispose();
}
ImageIO.write(image, "JPEG", out);
}
private Color getRandColor(int fc, int bc) {
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);
}
}

Html代碼

1. <a4j:mediaOutput element="img" cacheable="flase" session="false"     
2.                    rendered="true" createContent="#{validateCodeImageData.paint}"     
3.                   value="#{validateCodeImageData}" mimeType="image/jpeg">  
4.  </a4j:mediaOutput>   

<a4j:mediaOutput element="img" cacheable="flase" session="false"
rendered="true" createContent="#{validateCodeImageData.paint}"
value="#{validateCodeImageData}" mimeType="image/jpeg">
</a4j:mediaOutput> 

Xml代碼

1. <managed-bean>      
2.             <managed-bean-name>validateCodeImageData</managed-bean-name>      
3.             <managed-bean-class>      
4.                        com.jxh.common.view.ImageData      
5.             </managed-bean-class>      
6.             <managed-bean-scope>request</managed-bean-scope>      
7.   </managed-bean>