Java 将图片转二进制再将二进制转成图片

1. import java.awt.image.BufferedImage;      
2. import java.io.ByteArrayInputStream;      
3. import java.io.ByteArrayOutputStream;      
4. import java.io.File;      
5. import java.io.IOException;      
6.      
7. import javax.imageio.ImageIO;      
8.      
9. import sun.misc.BASE64Decoder;      
10. import sun.misc.BASE64Encoder;      
11.      
12. public class TestImageBinary {      
13.     static BASE64Encoder encoder = new sun.misc.BASE64Encoder();      
14.     static BASE64Decoder decoder = new sun.misc.BASE64Decoder();      
15.           
16.     public static void main(String[] args) {      
17.         System.out.println(getImageBinary());      
18.               
19.         base64StringToImage(getImageBinary());      
20.     }      
21.           
22.     static String getImageBinary(){      
23.         File f = new File("c://20090709442.jpg");             
24.         BufferedImage bi;      
25.         try {      
26.             bi = ImageIO.read(f);      
27.             ByteArrayOutputStream baos = new ByteArrayOutputStream();      
28.             ImageIO.write(bi, "jpg", baos);      
29.             byte[] bytes = baos.toByteArray();      
30.                   
31.             return encoder.encodeBuffer(bytes).trim();      
32.         } catch (IOException e) {      
33.             e.printStackTrace();      
34.         }      
35.         return null;      
36.     }      
37.           
38.     static void base64StringToImage(String base64String){      
39.         try {      
40.             byte[] bytes1 = decoder.decodeBuffer(base64String);      
41.                   
42.             ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);      
43.             BufferedImage bi1 =ImageIO.read(bais);      
44.             File w2 = new File("c://QQ.bmp");//可以是jpg,png,gif格式      
45.             ImageIO.write(bi1, "jpg", w2);//不管输出什么格式图片，此处不需改动      
46.         } catch (IOException e) {      
47.             e.printStackTrace();      
48.         }      
49.     }      
50.      
51. }