Java使用圖檔顯示電子郵件位址

今天在逛oschina的時候看見裡面有一個代碼分享的功能還不錯，蕃薯老大貼出了一段代碼個人覺得很實用轉出來分享下。 

Java代碼  

1. import java.awt.Color;  
2. import java.awt.Font;  
3. import java.awt.FontMetrics;  
4. import java.awt.Graphics2D;  
5. import java.awt.image.BufferedImage;  
6. import java.awt.image.IndexColorModel;  
7. import java.io.FileOutputStream;  
8. import java.io.IOException;  
9. import java.io.OutputStream;  
10. import javax.imageio.ImageIO;  
11. public class TextImageUtils {  
12.     private final static IndexColorModel icm = createIndexColorModel();  
13.     static IndexColorModel createIndexColorModel() {  
14.         BufferedImage ex = new BufferedImage(1, 1, BufferedImage.TYPE_BYTE_INDEXED);  
15.         IndexColorModel icm = (IndexColorModel) ex.getColorModel();  
16.         int SIZE = 256;  
17.         byte[] r = new byte[SIZE];  
18.         byte[] g = new byte[SIZE];  
19.         byte[] b = new byte[SIZE];  
20.         byte[] a = new byte[SIZE];  
21.         icm.getReds(r);  
22.         icm.getGreens(g);  
23.         icm.getBlues(b);  
24.         java.util.Arrays.fill(a, (byte)255);  
25.         r[0] = g[0] = b[0] = a[0] = 0; //transparent  
26.         return new IndexColorModel(8, SIZE, r, g, b, a);  
27.     }  
28.     public static void MakeEmailImage(String email, OutputStream out) throws IOException {  
29.         int height = 22;  
30.         BufferedImage bi = new BufferedImage(255,height,BufferedImage.TYPE_INT_RGB);          
31.         Graphics2D g = (Graphics2D)bi.getGraphics();  
32.         Font mFont = new Font("Verdana", Font.PLAIN, 14);  
33.         g.setFont(mFont);  
34.         g.drawString(email, 2, 19);  
35.         FontMetrics fm = g.getFontMetrics();  
36.         int new_width = fm.charsWidth(email.toCharArray(), 0, email.length()) + 4;  
37.         int new_height = fm.getHeight();  
38.         BufferedImage nbi = new BufferedImage(new_width, new_height,   
39.             BufferedImage.TYPE_BYTE_INDEXED, icm);  
40.         Graphics2D g2 = (Graphics2D)nbi.getGraphics();  
41.         g2.setColor(new Color(0,0,0,0));//透明  
42.         g2.fillRect(0,0,new_width,new_height);  
43.         g2.setFont(mFont);  
44.         g2.setColor(new Color(200,0,0));  
45.         g2.drawString(email, 2, new_height-4);  
46.         ImageIO.write(nbi, "gif", out);  
47.     }  
48.     public static void MakePhoneImage(String phone, OutputStream out) throws IOException {  
49.         int height = 22;  
50.         BufferedImage bi = new BufferedImage(255,height,BufferedImage.TYPE_INT_RGB);          
51.         Graphics2D g = (Graphics2D)bi.getGraphics();  
52.         Font mFont = new Font("Verdana", Font.BOLD, 20);  
53.         g.setFont(mFont);  
54.         g.drawString(phone, 2, 19);  
55.         FontMetrics fm = g.getFontMetrics();  
56.         int new_width = fm.charsWidth(phone.toCharArray(), 0, phone.length()) + 4;  
57.         int new_height = fm.getHeight();  
58.         BufferedImage nbi = new BufferedImage(new_width, new_height,  
59.             BufferedImage.TYPE_BYTE_INDEXED, icm);  
60.         Graphics2D g2 = (Graphics2D)nbi.getGraphics();  
61.         g2.setColor(new Color(0,0,0,0));//透明  
62.         g2.fillRect(0,0,new_width,new_height);  
63.         g2.setFont(mFont);  
64.         g2.setColor(new Color(200,0,0));  
65.         g2.drawString(phone, 2, new_height-4);        
66.         ImageIO.write(nbi, "gif", out);  
67.     }  
68.     public static void MakeProductAttribute(String attribute, OutputStream out) throws IOException{  
69.         int height = 22;  
70.         BufferedImage bi = new BufferedImage(255,height,BufferedImage.TYPE_INT_RGB);          
71.         Graphics2D g = (Graphics2D)bi.getGraphics();  
72.         Font mFont = new Font("宋體", Font.BOLD, 13);  
73.         g.setFont(mFont);  
74.         g.drawString(new String(attribute), 2, 19);  
75.         FontMetrics fm = g.getFontMetrics();  
76.         int new_width = fm.charsWidth(attribute.toCharArray(), 0, attribute.length()) + 4;  
77.         int new_height = fm.getHeight();  
78.         BufferedImage nbi = new BufferedImage(new_width, new_height,  
79.            BufferedImage.TYPE_BYTE_INDEXED, icm);  
80.         Graphics2D g2 = (Graphics2D)nbi.getGraphics();  
81.         g2.setColor(new Color(0,0,0,0));//透明  
82.         g2.fillRect(0,0,new_width,new_height);  
83.         g2.setFont(mFont);  
84.         g2.setColor(new Color(200,0,0));  
85.         g2.drawString(attribute, 2, new_height-4);  
86.         ImageIO.write(nbi, "gif", out);  
87.     }  
88.     public static void main(String[] args) throws IOException {  
89.         String num = "020-85551111";  
90.         FileOutputStream fos = new FileOutputStream("D:/phone.gif");  
91.         try{  
92.             MakePhoneImage(num, fos);  
93.         }finally{  
94.             fos.close();  
95.         }  
96.         String email = "[email protected]";  
97.         FileOutputStream fos2 = new FileOutputStream("D:/email.gif");  
98.         try{  
99.             MakeEmailImage(email, fos2);  
100.         }finally{  
101.             fos2.close();  
102.         }  
103.     }  
104. }